I work as a tenured Associate Professor in Computational Structural Engineering at
Department of Civil Engineering,
Aalto University
School of Engineering.
I was appointed as
August-Wilhelm Scheer Visiting Professor at
Technische Universität München (TUM)
and Honorary Fellow of
TUM Institute for Advanced Study (TUM-IAS) in 2018.
My visiting professorship was be hosted by
Prof. Ernst Rank,
Chair for Computation in Engineering,
and
Dr.-Ing. Stefan Kollmannsberger,
Group for Simulation in Applied Mechanics.
Since 2018, I have served as Editor-in-Chief in
Journal of Structural Mechanics (Rakenteiden Mekaniikka), while in 2019 I have been invited to the Editorial Board of
Mathematics and Mechanics of Solids,
elected to the Executive Committee of
Nordic Association of Computational Mechanics (a member of ECCOMAS and IACM)
and chosen to be the secretary of the Finnish National Committee on Theoretical and Applied Mechanics (a member of IUTAM).
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Theoretical and applied mechanics -- physico-mathematical models and numerical methods for mechanics of solids and structures
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The THEORETICAL FOCUS of my research group is close to my personal research background in the crossroads of Theoretical and Applied Mechanics and Numerical Analysis with a focus on Computational Mechanics, Computational Structural Mechanics and Computational Structural Engineering. My research group focuses on models and methods for mechanics of solids and structures, especially finite element methods (FEM) and isogeometric analysis (IGA) for mechanics of thin structures, such as plates, shells and beams. Our activities range from continuum models and related numerical methods all the way down to programming, software issues and applications, such as structural analysis and design (see Design+Analysis below) as well as
integration of Computer-Aided Design / Building Information Modeling (CAD / BIM), Computer-Aided Engineering / Finite Element Analysis (CAE / FEA) and Computer-Aided Manufacturing (CAM) such as additive manufacturing (or 3D-printing).
My most recent research project, funded by Academy of Finland (2013-2018),
entitled Isogeometric adaptive methods for thin-walled structures -- with applications from architectural and industrial design in structural and mechanical engineering,
focused our activities on generalized continuum models of strain gradient elasticity theories and isogeometric Galerkin methods.
Currently, I have one post-doctoral researcher in my group -- Jalal Torabi -- and one full-time doctoral student -- Tuan Nguyen -- under my supervision forming the core of the research group. A part-time doctoral student Antti Valkonen supplements the group with an industrial point of view,
with some master and bachelor students conducting their MSc and BSc Theses under my supervision or instruction.
Quite recently, former members of my group have moved on to senior researcher and lecturer positions in other institutes or industry: post-doctoral researchers Loc Tran Vinh, Ioannis Tsiptsis, Sergei Khakalo, Viacheslav Balobanov, Summer Shahzad and Antti H. Niemi.
Every now and then, typically for summer periods,
we hire master and/or bachelor students for research assistant positions.
Altogether, we are interested in collaboration within both academic research topics and ambitious industrial applications in the aforementioned fields.
How do we deal with the blinking singularities of a star plate? We snow them by adaptively refined mesh flakes!
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Design+Analysis -- multi-faceted teams, research and teaching projects, visiting lectures
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The APPLICATIONAL FOCUS of my research group is on
small-scale research and teaching projects
accomplished by multi-faceted Design+Analysis teams focusing on
computational models and methods of structural and mechanical engineering combined with parametric and algorithmic architecture and design.
New materials and digitalized production technologies are essential side topics as well, with links to research groups of our site university working on complex materials and digital design methodologies, especially.
Modeling materials with a microstructure is an important goal of our computational approach.
Altogether, we are interested in collaboration within both academic research topics and ambitious industrial applications in the aforementioned fields.
Radical Wood Pavilion Shanghai
The first Design+Analysis project was an educational project for designing, analyzing, manufacturing and constructing a
Radical Wood Pavilion
with furniture for
Radical Design Week Shanghai 2012
as one of the
RDW 2012 activities presented by Aalto University.
First photos of the pavilion have been published on the
Facebook page of Aalto ENG,
while
an article in Aalto ENG News
and another one in
Puu | Wood | Holz | Bois magazine (1/2013, pp. 22-27)
provide some further information.
The design-analysis-manufacturing process of the project utilizes and study
modern computer aided technologies for structural design and analysis of
wood architecture and furniture design.
A related
Design+Analysis Workshop 2012 - Radical Wood Pavilions
was organized at Aalto University Department of Civil and Structural Engineering
for graduate and post-graduate students in
structural engineering, architecture and design during September 2012
(cf. the
workshop schedule). Further D+A workshops on similar -- or totally different -- themes will be organized in the future.
Another Generosity at the 16th International Architecture Exhibition 2018 in Venice
At
International Architecture Exhibition in Venice 2018,
I was involved in a project entitled
Another Generosity, curated by Eero Lundén and Juulia Kauste. The presentation was created by Lundén Architecture Company in collaboration with a collection of Nordic voices, Bergent, BuroHappold Engineering, Aalto University and Pneumocell.
Seminars and Special Assignments
Various Design+Analysis special assignments and seminar works have been accomplished by students from
Department of Civil Engineering,
School of Engineering,
in collaboration with students from
Department of Design and
Department of Architecture,
School of Arts, Design and Architecture.
These project works typically include design of structural details, structural analysis with both analytical and computational tools, and sometimes experimental testing and site construction as well; here a couple of examples:
Design+Analysis visiting lectures
Design+Analysis VISITING LECTURES target for presenting and discussing a diverse collection of topics related to Computational Structural Engineering from the perspective of Structural Analysis and in the context of Architectural, Industrial and Structural Design, with a special emphasis on Theoretical and Applied Mechanics of Solids and Structures. Accordingly, term design – besides architectural, industrial and structural design – refers to designing models and methods, whereas term analysis refers to analyzing models and methods – besides structural analysis.
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Nina Korshunova:
The Finite Cell Method and its Application to the Material Characterization of Additively Manufactured Microarchitectured Structures;
Chair for Computational Modeling and Simulation, Technische Universität München, Germany;
November 23, 2016.
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Prof. Arash Yavari:
Elastodynamic Transformation Cloaking;
School of Civil Engineering and Environmental,
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology, US;
July 9, 2019.
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Adj. Prof. Timo Saksala:
Numerical Modelling of Quasi-Brittle Materials with Polygonal Finite Elements;
Laboratory of Civil Engineering, Tampere University, Finland;
May 2, 2019.
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Prof. Francesco dell'Isola:
“Data-driven” or “Theory-driven”? - An Epistemological Reflexion Motivated by the Need of Designing Exotic Metamaterials;
Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Italy;
December 7, 2017.
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Prof. Jan Sladek:
Micro/nano-Sized Piezoelectric Structures Analyzed by Strain Gradient Theories;
Institute of Construction and Architecture, Slovak Academy of Sciences, Slovakia;
October 26, 2017.
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Prof. Alexander Freidin:
Equilibrium Two-Phase Microstructures
against Optimal Composite Microstructures;
Institute for Problems in Mechanical Engineering, Russian Academy of Sciences;
Institute of Applied Mathematics and Mechanics, Saint-Petersburg State University, Saint-Petersburg Polytechnic University;
January 11, 2017.
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Dr. Stefan Kollmannsberger:
A High-Order Accurate Computational Framework for the Simulation of SLM Processes;
Chair for Computation in Engineering, Technische Universität München, Germany;
November 23, 2016.
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Prof. Alexander Freidin:
Chemical Affinity Tensor and Stress-Assist Chemical Reaction Front Propagation in Solids;
Institute for Problems in Mechanical Engineering, Russian Academy of Sciences;
Institute of Applied Mathematics and Mechanics, Saint-Petersburg State University, Saint-Petersburg Polytechnic University;
January 8, 2015.
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Dr. Josef Kiendl:
Isogeometric Analysis and Shape Optimization of Shell Structures;
Department of Civil Engineering and Architecture University of Pavia, Italy;
April 23, 2014.
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Dr. Miroslav Tuma:
Enhanced incomplete Cholesky factorization;
Department of Computational Methods, Institute of Computer Science
Academy of Sciences of the Czech Republic;
November 11, 2013.
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Publications in peer-reviewed journals [and research reports or preprints]
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L. V. Tran, J. Niiranen:
A geometrically nonlinear Euler–Bernoulli beam model within strain gradient elasticity with isogeometric analysis and lattice structure applications;
Mathematics and Mechanics of Complex Systems
8, 345-371
(2020).
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T. H. A. Nguyen, J. Niiranen:
A second strain gradient damage model with a numerical implementation for quasi-brittle materials with micro-architectures;
Mathematics and Mechanics of Solids
25, 515-546
(2020).
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S. Khakalo, J. Niiranen:
Anisotropic strain gradient thermoelasticity for cellular structures: plate models, homogenization and isogeometric analysis;
Journal of the Mechanics and Physics of Solids,
134, 103728
(2020).
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S. Khakalo, J. Niiranen:
Lattice structures as thermoelastic strain gradient metamaterials: Evidence from full-field simulations and applications to functionally step-wise-graded beams;
Composites Part B: Engineering,
177, 107224
(2019).
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I. N. Tsiptsis, L. Liimatainen, T. Kotnik, J. Niiranen:
Structural optimization employing isogeometric tools in Particle Swarm Optimizer;
Journal of Building Engineering,
24, 100761
(2019).
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V. Balobanov, J. Kiendl, S. Khakalo, J. Niiranen:
Kirchhoff-Love shells within strain gradient elasticity: weak and strong formulations and an H^3-conforming isogeometric implementation;
Computer Methods in Applied Mechanics and Engineering,
344, 837-857
(2019).
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L. Koskela, A. Ferrantelli, J. Niiranen, E. Pikas, B. Dave:
Epistemological explanation of lean construction
;
Journal of Construction Engineering and Management,
145, 04018131
(2019).
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J. Niiranen, V. Balobanov, J. Kiendl, S. B. Hosseini:
Variational formulations, model comparisons and numerical methods for Euler-Bernoulli micro- and nano-beam models;
Mathematics and Mechanics of Solids
24, 312-335
(2019).
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S. Shahzad, J. Niiranen:
Analytical solution with validity analysis for an elliptical void and a rigid inclusion under uniform or nonuniform anti-plane loading;
Theoretical and Applied Fracture Mechanics,
97, 62-72
(2018).
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V. Balobanov, J. Niiranen:
Locking-free variational formulations and isogeometric analysis for the Timoshenko beam models of strain gradient and classical elasticity;
Computer Methods in Applied Mechanics and Engineering,
339,
137-159
(2018).
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S. Shahzad, J. Niiranen:
Analytical solutions and stress concentration factors for annuli with inhomogeneous boundary conditions;
Journal of Applied Mechanics,
85(7), 071008
(2018).
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S. Khakalo, J. Niiranen:
Form II of Mindlin's second strain gradient theory of elasticity with a simplification: for materials and structures from nano- to macro-scales;
European Journal of Mechanics - A/Solids
71, 292-319
(2018).
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S. Khakalo, V. Balobanov, J. Niiranen:
Modelling size-dependent bending, buckling and vibrations of 2D triangular lattices by strain gradient elasticity models: applications to sandwich beams and auxetics;
International Journal of Engineering Science,
127, 33-52
(2018).
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S. T. Yaghoubi, V. Balobanov, M. Mousavi, J. Niiranen:
Variational formulations and isogeometric analysis for the dynamics of anisotropic gradient-elastic flexural and shear-deformable beams;
European Journal of Mechanics - A/Solids
69, 113-123
(2018).
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A. Morozov, S. Khakalo, V. Balobanov, A. B. Freidin, W. H. Müller, J. Niiranen:
Modeling chemical reaction front propagation by using an isogeometric analysis;
Technische Mechanik
38, 73-90
(2018).
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J. Niiranen, S. Khakalo, V. Balobanov:
Isogeometric finite element analysis of mode I cracks within strain gradient elasticity;
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
50 (3),
99-121
(2017).
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S. Khakalo, J. Niiranen:
Gradient-elastic stress analysis near cylindrical holes in a plane under bi-axial tension fields;
International Journal of Solids and Structures,
110-111,
351–366 (2017).
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S. Khakalo, J. Niiranen:
Isogeometric analysis of higher-order gradient elasticity by user elements of a commercial finite element software;
Computer-Aided Design,
82,
154–169 (2017).
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J. Niiranen, A. H. Niemi:
Variational formulations and general boundary conditions for sixth-order boundary value problems of gradient-elastic Kirchhoff plates;
European Journal of Mechanics - A/Solids,
61,
164–179
(2017).
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J. Niiranen, J. Kiendl, A. H. Niemi, A. Reali:
Isogeometric analysis for sixth-order boundary value problems of gradient-elastic Kirchhoff plates;
Computer Methods in Applied Mechanics and Engineering,
316,
328-348
(2017).
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J. Niiranen, S. Khakalo, V. Balobanov, A. H. Niemi:
Variational formulation and isogeometric analysis of fourth-order boundary value problems of gradient-elastic bar and plane strain/stress problems;
Computer Methods in Applied Mechanics and Engineering,
308,
182–211
(2016).
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S. M. Mousavi, J. Niiranen, A. H. Niemi:
Differential cubature method for gradient-elastic Kirchhoff plates;
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
48 (3)
(2015).
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L. Beirao da Veiga,
T.J.R. Hughes,
J. Kiendl,
C. Lovadina,
J. Niiranen
A. Reali,
H. Speleers:
A locking-free model for Reissner-Mindlin plates: Analysis and isogeometric implementation via NURBS and triangular NURPS;
Mathematical Models and Methods in Applied Sciences,
25 (8),
1519-1551
(2015).
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L. Beirao da Veiga, J. Niiranen,
R. Stenberg:
A posteriori error analysis for the postprocessed MITC plate elements;
SIAM Journal on Numerical Analysis
51 (1),
1-23
(2013).
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error analysis for the Morley plate element with general boundary conditions;
International Journal for Numerical Methods in Engineering,
83 (1),
1-26
(2010).
[preprint Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A556
(2008).]
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J. Niiranen:
Laattarakenteiden laskennallisten menetelmien virheanalyysi ja adaptiiviset elementtimenetelmät,
Error analysis of computational methods for plate structures and adaptive finite element methods (in finnish);
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
42 (3),
99-121
(2009).
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J. Luntta, J. Niiranen:
Perusteita ja esimerkkejä laattarakenteiden mallinnuksesta elementtimenetelmällä,
Basic principles and examples for finite element analysis of plate structures (in finnish);
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
42 (3),
122-137 (2009).
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J. Niiranen, M. Vuorinen:
Elementtimenetelmän adaptiivinen verkontihennys laattarakenteiden analysoinnissa,
Adaptive finite element mesh refinements in plate structure analysis (in finnish);
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
42 (3),
149-170 (2009).
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A family of C^0 finite elements for Kirchhoff plates II: Numerical results;
Computer Methods in Applied Mechanics and Engineering,
197 (21-24),
1850-1864
(2008).
[preprints
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A526
(2007);
Pubblicazioni, Preprints - Technical Reports,
I.M.A.T.I. - C.N.R.,
20-PV (2006).]
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J. Niiranen:
A priori and a posteriori error analysis of finite element methods for plate models;
Dissertation,
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A534
(2007).
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A family of C^0 finite elements for Kirchhoff plates I: Error analysis;
SIAM Journal on Numerical Analysis,
45 (5),
2047-2071
(2007).
[preprints
arXiv
math.NA/0611690;
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A483
(2006).]
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M. Lyly,
J. Niiranen, R. Stenberg:
Superconvergence and postprocessing of MITC plate elements;
Computer Methods in Applied Mechanics and Engineering,
196 (33-34),
3110-3126
(2007).
[preprint
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A474
(2005).]
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error estimates for the Morley plate bending element;
Numerische Mathematik,
106 (2),
165-179
(2007).
[preprint
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A492
(2006).]
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M. Lyly, J. Niiranen, R. Stenberg:
A refined error analysis of MITC plate elements;
Mathematical Models and Methods in Applied Sciences,
16 (7),
967-977
(2006).
[preprint
Helsinki University of Technology, Institute of Mathematics,
Research Reports,
A482
(2005).]
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M. Lyly, J. Niiranen, R. Stenberg:
Computational results for the superconvergence and postprocessing of MITC plate elements;
Rakenteiden Mekaniikka, Journal of Structural Mechanics,
38 (3), 75-78 (2005),
Special Issue for the Proceedings of the 18th Nordic Seminar on Computational Mechanics,
Espoo, October 27-30, 2005, J. Paavola, J. Freund (eds.).
pdf-preprint
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Publications in other journals
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Publications in conference proceedings and collections
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S. Khakalo, J. Niiranen:
Variational Formulations and Galerkin Methods for Strain Gradient Elasticity (peer-reviewed);
Encyclopedia of Continuum Mechanics, Living Edition,
Springer-Verlag GmbH Germany, Springer Nature 2018, Springer, Berlin, Heidelberg
(2019).
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G. Filz, S. Shahzad, J. Niiranen:
Pringle: equitangential bending active frame and minimal surface robe-net;
In: Proceedings of the IASS Symposium 2018, Creativity in Structural Design, Caitlin Mueller, Sigrid Adriaenssens (eds.), July 16-20, 2018, MIT, Boston, USA.
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L. Koskela, E. Pikas, J. Niiranen, A. Ferrantelli, B. Dave:
On epistemology of construction engineering and management (peer-reviewed);
In: LC3 2017 Volume II – Proceedings of the 25th Annual Conference of
the International Group for Lean Construction (IGLC), Walsh, K., Sacks, R., Brilakis, I. (eds.), Heraklion, Greece,
pp. 169–176.
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V. Balobanov, S. Khakalo, J. Kiendl, J. Niiranen:
Shell models in the framework of generalized continuum theories: isogeometric implementation and applications;
In Malte von Scheven, Marc-André Keip, Nils Karajan (eds.),
Proceedings of the 7th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry,
October 11-13, 2017 in Stuttgart, Germany,
pp. 480-484.
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J. Niiranen, S. Khakalo, V. Balobanov:
Strain gradient elasticity theories in lattice structure modelling;
In Malte von Scheven, Marc-André Keip, Nils Karajan (eds.),
Proceedings of the 7th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry,
October 11-13, 2017 in Stuttgart, Germany,
pp. 471-475.
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S. Khakalo, V. Balobanov, J. Niiranen:
Isogeometric static analysis of gradient-elastic plane strain/stress problems (peer-reviewed);
In H. Altenbach and S. Forest (eds.),
Advanced Structured Materials, Generalized Continua as Models for Classical and Advanced Materials,
pp. 229-236.
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V. Balobanov, S. Khakalo, J. Niiranen:
Isogeometric analysis of gradient-elastic 1D and 2D problems (peer-reviewed);
In H. Altenbach and S. Forest (eds.),
Advanced Structured Materials, Generalized Continua as Models for Classical and Advanced Materials,
pp. 37-46.
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J. Niiranen, S. Khakalo, V. Balobanov, A. H. Niemi, J. Kiendl, B. Hosseini, A. Reali:
Isogeometric analysis of gradient-elastic thin structures;
In A. Berezovski, K. Tamm, T. Peets (eds.),
Proceedings of the
NSCM-28,
28th Nordic Seminar on Computational Mechanics, 22–23 October Tallinn, Estonia, 2015; pp. 125-128.
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S. Khakalo, J. Niiranen, V. Balobanov:
Isogeometric static and dynamic analysis of gradient-elastic plane strain/stress problems with applications;
In A. Berezovski, K. Tamm, T. Peets (eds.),
Proceedings of the
NSCM-28,
28th Nordic Seminar on Computational Mechanics, 22–23 October Tallinn, Estonia, 2015; pp. 85-88.
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V. Balobanov, J. Niiranen, S. Khakalo:
Isogeometric analysis of gradient-elastic rods and 2D gradient-elastic dynamic problems;
In A. Berezovski, K. Tamm, T. Peets (eds.),
Proceedings of the
NSCM-28,
28th Nordic Seminar on Computational Mechanics, 22–23 October Tallinn, Estonia, 2015; pp. 33-36.
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V. Balobanov, J. Niiranen, S. Khakalo, B. Hosseini:
Isogeometric static and dynamic analysis of gradient-elastic plane strain problems;
In R. Kouhia, J. Mäkinen, S. Pajunen and T. Saksala (eds.),
Proceedings of the
XII Finnish Mechanics Days,
June 4-5, Tampere, Finland. Finnish Association for Structural Mechanics, Helsinki, Finland, 2015, pp. 273–276.
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S. Khakalo, J. Niiranen, V. Balobanov, B. Hosseini:
Isogeometric analysis of gradient-elastic rods and 2D gradient-elastic dynamic problems;
In R. Kouhia, J. Mäkinen, S. Pajunen and T. Saksala (eds.),
Proceedings of the
XII Finnish Mechanics Days,
June 4-5, Tampere, Finland. Finnish Association for Structural Mechanics, Helsinki, Finland, 2015, pp. 277–280.
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D. Paudel, J. Romanoff, B. Auchmann, J. Niiranen, M. Maciejewski:
Quench Simulation of Superconducting Magnets with Commercial Multiphysics Software;
CERN-THESIS-2015-090, (2015).
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J. Niiranen, A. Niemi, J. Kiendl:
Isogeometric analysis for gradient-elastic Kirchhoff plates;
In A. Eriksson, A. Kulachenko, M. Mihaescu, G Tibert (eds.),
Proceedings of
NSCM-27,
the 27th Nordic Seminar on Computational Mechanics,
Royal Institute of Technology, Stockholm, Sweden, October 12–24, 2014;
pages 276-279;
TRITA-MEK Technical Report 2014:24, KTH Mechanics, Stockholm, Sweden, 2014.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
Residual based a posteriori error estimates for MITC plate elements;
In J. Eberhardsteiner, H. J. Böhm, F. G. Rammerstorfer (eds.),
Conference Proceedings of
ECCOMAS 2012,
6th European Congress on Computational Methods in Applied Sciences and Engineering,
University of Vienna, Austria, September 10–14, 2012.
Paper ID 1825, 15 p.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A residual based a posteriori error estimator for post-processed MITC plate elements;
In J. Freund and R. Kouhia (eds.), Proceedings of the
24th Nordic Seminar on Computational Mechanics,
Helsinki, Finland, October 3-4, 2011; pages 89-92;
Aalto University publication series Science + Technology 23/2011,
Helsinki, Finland, 2011.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error estimates for MITC plate elements;
In D. Aubry, P. Diez, B. Tie, N. Pares (eds.),
Adaptive Modeling and Simulation 2011;
Proceedings of
ADMOS 2011,
the V International Conference on Adaptive Modeling and Simulation,
Paris, France, June 6-8, 2011;
pages 353-364;
CIMNE, Barcelona, Spain, 2011.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error analysis and adaptive computations for Kirchhoff-Love plate bending elements;
In R. Mäkinen, P. Neittaanmäki, T. Tuovinen, K. Valpe (eds.),
Proceedings of the
10th Finnish Mechanics Days, Jyväskylä, Finland, December 3-4, 2009; pages 24-33;
University of Jyväskylä, Reports of the Department of Mathematical Information Technology, Series A. Collections, No. A 1/2009.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error analysis for the Morley plate element;
In Ph. Bouillard, P. Diez (eds.),
Adaptive Modeling and Simulation 2009;
Proceedings of
ADMOS 2009,
the IV International Conference on Adaptive Modeling and Simulation,
Bruxelles, Belgium, May 25-27, 2009;
pages 47-50;
CIMNE, Barcelona, Spain, 2009.
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J. Niiranen, L. Beirao da Veiga, R. Stenberg:
A posteriori error analysis for Kirchhoff plate elements (peer-reviewed);
In K. Kunisch, G. Of, O. Steinbach (eds.),
Numerical Mathematics and Advanced Applications;
Proceedings of
ENUMATH 2007,
the 7th European Conference on Numerical Mathematics and Advanced Applications,
Graz, Austria, September 2007;
pages 57-64;
Springer-Verlag, Berlin, Heidelberg, 2008.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A new family of C^0 finite elements for the Kirchhoff plate model;
In B. Miara, G. Stavroulakis and V. Valente (eds.),
Topics on Mathematics for Smart Systems;
Proceedings of the
European Conference,
Rome, Italy, October 26-28, 2006;
pages 45-60;
World Scientific, Singapore, 2007.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A new finite element method for Kirchhoff plates;
In V. Cutello, G. Fotia, L. Puccio (eds.),
Applied and Industrial Mathematics in Italy II;
Selected Contributions from the
8th SIMAI Conference,
Baia Samuele (Ragusa), Italy, 22-26 May, 2006;
pages 125-136;
World Scientific, 2007.
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M. Lyly, J. Niiranen, R. Stenberg:
Some new results on MITC plate elements;
In the Conference Proceedings of ECCM 2006,
III European Conference on Computational Solid and Structural Mechanics,
Lisbon, Portugal, June 5-9, 2006. Paper number 2000, 14 p.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A new finite element method for Kirchhoff plates;
In the Conference Proceedings of ECCM 2006,
III European Conference on Computational Solid and Structural Mechanics,
Lisbon, Portugal, June 5-9, 2006. Paper number 1970, 15 p.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A family of C^0 finite elements for Kirchhoff plates with free boundary conditions (peer-reviewed);
In A. Bermudez de Castro, D. Gomez, P. Quintela and P. Salgado (eds.),
Numerical Mathematics and Advanced Applications;
Proceedings of
ENUMATH 2005,
the 6th European Conference on Numerical Mathematics and Advanced Applications,
Santiago de Compostela, Spain, July 18-22, 2005;
pages 1051-1058;
Springer-Verlag, Berlin, Heidelberg, New York, 2006.
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M. Lyly, J. Niiranen, R. Stenberg:
A postprocessing method for the MITC plate elements (peer-reviewed);
In A. Bermudez de Castro, D. Gomez, P. Quintela and P. Salgado (eds.),
Numerical Mathematics and Advanced Applications;
Proceedings of
ENUMATH 2005,
the 6th European Conference on Numerical Mathematics and Advanced Applications,
Santiago de Compostela, Spain, July 18-22, 2005;
pages 1059-1067;
Springer-Verlag, Berlin, Heidelberg, New York, 2006.
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M. Lyly, J. Niiranen, R. Stenberg:
Jälkikäsittelymenetelmä MITC-laattaelementeille,
A postprocessing method for MITC plate elements (in finnish);
VIII Suomen mekaniikkapäivät, Espoossa 12.-13. kesäkuuta 2003,
Toim. P. Råback, K. Santaoja, R. Stenberg,
Teknillisen korkeakoulun lujuusopin laboratorion julkaisuja,
TKK-LO-36, Espoo (2003), 541-552.
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Selected conference talks and visiting lectures
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J. Niiranen, S. Tuteja, V. Balobanov and S. Khakalo:
Solids and structures in strain gradient elasticity: numerical comparisons between dimension reduction models and 3D models;
The ECCOMAS Conference on Computational Solid and Structural Mechanics,
(Solids, Structures and Coupled Problems), UK, June 11–15, 2018.
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J. Niiranen, S. Khakalo, V. Balobanov, A. H. Niemi, J. Kiendl and A. Reali:
Isogeometric analysis of gradient-elastic thin structures;
ECCOMAS Congress 2016,
European Congress on Computational Methods in Applied Sciences and Engineering
Crete Island, Greece, June 5–10, 2016.
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J. Niiranen, A. Niemi, J. Kiendl:
Isogeometric analysis of gradient-elastic Kirchhoff plates;
WCCM XI - ECCM V - ECFD VI,
the 11th World Congress on Computational Mechanics,
Barcelona, Spain, July 20–25, 2014.
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J. Niiranen:
Radical Wood Pavilion Shanghai 2012;
Visiting lecture at the Institute of Cross-Cutting Technologies, Chairs of
Computation in Engineering and
Computational Modeling and Simulation,
Faculty of Civil Engineering and Surveying,
Technische Universität München,
Germany, February 4, 2013.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
Residual based a posteriori error estimates for MITC plate elements;
ECCOMAS 2012,
6th European Congress on Computational Methods in Applied Sciences and Engineering,
University of Vienna, Austria, September 10–14, 2012.
pdf-slides
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J. Niiranen, L. Beirao da Veiga, R. Stenberg:
A posteriori error estimates for MITC plate elements;
ADMOS 2011,
the V International Conference on Adaptive Modeling and Simulation,
Paris, France, June 6-8, 2011.
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J. Niiranen:
Finite element methods for plate structure models
- superconvergence, postprocessing and adaptivity;
Seminar in Applied Mathematics,
Department of Mathematics,
University of Milan,
Italy, June 4, 2009.
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error analysis for the Morley plate element;
ADMOS 2009,
International Conference on Adaptive Modeling and Simulation,
Bruxelles, Belgium, May 25-27, 2009.
pdf-slides
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L. Beirao da Veiga, J. Niiranen, R. Stenberg:
A posteriori error analysis for Kirchhoff plate elements;
ENUMATH 2007,
the 7th European Conference on Numerical Mathematics and Advanced Applications,
Graz, Austria, September 10-14, 2007.
pdf-slides
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M. Lyly, J. Niiranen, R. Stenberg:
Computational results for the superconvergence and postprocessing of MITC plate elements;
NSCM18,
the 18th Nordic Seminar on Computational Mechanics,
Espoo, October 27-30, 2005.
pdf-slides
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D.Sc. Thesis
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I have finished my DSc studies in 2007 at the
Department of Mathematics,
TKK,
funded mainly by the
Finnish National Graduate School in Engineering Mechanics
and the
Academy of Finland.
For my dissertation, A priori and a posteriori error analysis of finite element methods for plate models,
and the defence, please see the links below. For a printed copy of the thesis, please contact me.
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M.Sc. Thesis and related documents
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Research projects and collaboration
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Academy Research Fellow project funded by the
Academy of Finland:
Isogeometric adaptive methods for thin-walled structures -- with applications from architectural and industrial design in structural and mechanical engineering (2013-2018).
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Visiting Post-doctoral Researcher funded by Tutkijat maailmalle foundation union at
IMATI - CNR, Istituto di Matematica Applicata e Tecnologie Informatiche,
Pavia, Italy (September 2012-January 2013).
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Postdoctoral researcher's project funded by the
Academy of Finland:
Adaptive finite element methods for thin structures -- from rigorous theory to efficient computations (2009-2012).
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Researcher in a research project funded by
TEKES - Finnish Funding Agency for Technology and Innovation:
Modelling and simulation of coupled problems in mechanics and electrical engineering, KOMASI (2005-2008).
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Visiting Researcher at
IMATI - CNR, Istituto di Matematica Applicata e Tecnologie Informatiche,
Pavia, Italy (May-July, 2006).
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Young Researcher in a research project funded by the
Academy of Finland:
Foundations of Computational Mechanics (2003-2006).
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Young Researcher in a Research Training Network funded by the
European Commission's 5th Framework Programme:
Smart Systems; New Materials, Adaptive Systems and their Nonlinearities;
Modeling, Control and Numerical Simulation (2002-2006).
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Enterprise connections
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I am interested in collaboration within both academic research topics and ambitious industrial applications in the fields of computational structural and mechanical engineering combined with parametric and algorithmic architecture and design.
Advanced analysis techniques for thin-walled structures, in particular, together with new materials and digitalized production technologies, are the most natural topics for innovations combining theoretical and practical expertise.
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Most of the Master's Theses under my supervision have been conducted in collaboration with the leading structural engineering, structural design and construction consultancy companies in Finland. It can be considered as a rule that our graduates finally sign contracts for serving as structural designers/analysts in these companies -- Ramboll Finland, Sweco Finland and Pöyry Finland serving as examples.
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Within non-standard architectural engineering, Lundén Architecture Company has been a key partner for us in developing teaching and development practices focusing, in particular, on collaborative design approaches, digital design methodologies and non-standard wooden structures.
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Engineering office
Insinööritoimisto FEMdata
was my employer during 1997-2002.
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I have worked as a trainee for
KCI Konecranes,
Konecranes VLC Corporation, during 1995-1996.
Jarkko Niiranen
January 1, 2021
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