Nonlinear regularization operators as derived from the micromorphic approach to gradient elasticity, viscoplasticity and damage

S Forest - Proceedings of the Royal Society A …, 2016 - royalsocietypublishing.org
The construction of regularization operators presented in this work is based on the
introduction of strain or damage micromorphic degrees of freedom in addition to the …

[HTML][HTML] Efficient gradient enhancements for plasticity with ductile damage in the logarithmic strain space

J Friedlein, J Mergheim, P Steinmann - European Journal of Mechanics-A …, 2023 - Elsevier
We contrast different gradient-enhancements for plasticity-damage material models in the
logarithmic strain space and compare them to reference models based on multiplicative …

[HTML][HTML] Observations on additive plasticity in the logarithmic strain space at excessive strains

J Friedlein, J Mergheim, P Steinmann - International Journal of Solids and …, 2022 - Elsevier
Additive plasticity in the logarithmic strain space is compared to multiplicative plasticity for
various loading cases including coaxial and non-coaxial plastic deformations. Even though …

The exponentiated Hencky-logarithmic strain energy: part III—coupling with idealized multiplicative isotropic finite strain plasticity

P Neff, ID Ghiba - Continuum Mechanics and Thermodynamics, 2016 - Springer
We investigate an immediate application in finite strain multiplicative plasticity of the family of
isotropic volumetric–isochoric decoupled strain energies F ↦ W_\rm eH (F):= W _\rm eH …

Loss of ellipticity for non-coaxial plastic deformations in additive logarithmic finite strain plasticity

P Neff, ID Ghiba - International Journal of Non-Linear Mechanics, 2016 - Elsevier
In this paper we consider the additive logarithmic finite strain plasticity formulation from the
view point of loss of ellipticity in elastic unloading. We prove that even if an elastic energy F↦ …

[PDF][PDF] Micromorphic approach to gradient plasticity and damage

S Forest - Handbook of Nonlocal Continuum Mechanics …, 2019 - matperso.minesparis.psl.eu
Eringen and Mindlin's original micromorphic continuum model is presented and extended
towards finite elastic-plastic deformations. The framework is generalized to any additional …

Hyperplastic material model with damage for woven composites

T Mandys, T Kroupa, V Laš, L Lobovský - Composites Science and …, 2019 - Elsevier
A hyperplastic material model with damage was developed in order to describe the non-
linear mechanical behaviour of woven composites. The proposed model is based on …

[PDF][PDF] Loss of ellipticity in additive logarithmic finite strain plasticity

P Neff, ID Ghiba - arXiv preprint arXiv:1410.2819, 2014 - math.uaic.ro
In this paper we consider the additive logarithmic finite strain plasticity formulation from the
view point of loss of ellipticity in elastic unloading. We prove that even if an elastic energy …

An inverse finite element approach to calculate full-field forming strains

R Ritt, M Machado, M Fischlschweiger… - Key engineering …, 2015 - Trans Tech Publ
A methodology to calculate surface strains from a rectangular grid placed on a forming blank
is introduced. This method consists of treating the grid points as nodes of a finite element …

[PDF][PDF] The exponentiated Hencky-logarithmic strain energy. Part III: Coupling with idealized multiplicative isotropic finite strain plasticity

P Ne, ID Ghiba - 2015 - math.uaic.ro
The exponentiated Hencky-logarithmic strain energy. Part III: Coupling with idealized
multiplicative isotropic nite strain plas Page 1 The exponentiated Hencky-logarithmic strain …