Matti Ristinmaa
Lund University
156 Papers
675 Citations
Matti Ristinmaa is an academic researcher from Lund University. The author has contributed to research in topics: Finite element method & Constitutive equation. The author has an hindex of 28, co-authored 142 publications. Previous affiliations of Matti Ristinmaa include Chalmers University of Technology.
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Papers
Modelling multiphase transport in deformable cellulose based materials exhibiting internal mass exchange and swelling
TL;DR: In this paper, a thermodynamically consistent model for porous cellulose networks is proposed based on mixture theory using chemical potentials as flow potentials, which enables analysis of transient flow accounting for effects of deformation, swelling and moisture sorption dynamics.
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Model Describing Material-Dependent Deformation Behavior in High-Velocity Metal Forming Processes
Håkan Hallberg,Håkan Hallberg,Kristina Ryttberg,Kristina Ryttberg,Matti Ristinmaa,Matti Ristinmaa +5 more
TL;DR: In this article, a constitutive model for rate-dependent and thermomechanically coupled plasticity at finite strains is presented, where the stored energy is assumed to be a function of a single internal variable which differs from the effective plastic strain.
Long term evolution of microstructure and stress around tin whiskers investigated using scanning Laue microdiffraction
TL;DR: In this paper, the authors used scanning Laue microdiffraction to study the evolution of the microstructure and the stress field around two tin whiskers during ageing for up to 21 months.
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Response of moist paperboard during rapid compression and heating
Henrik Askfelt,Matti Ristinmaa +1 more
TL;DR: In this article, the authors provide explicit formats of the necessary constitutive relations specific to moist paperboard exposed to extensive compression and heating in short periods of time, as well as specific interaction terms for orthotropic paperboard.
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A physically motivated modification of the strain equivalence approach
Mattias Olsson,Matti Ristinmaa +1 more
TL;DR: In this paper, a modification of the postulate of strain equivalence is proposed based on physical arguments, which predicts the elastic strain to vanish when failure takes place, and the results reveal that the modification gives promising results.
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