Efficient and accurate two-scale FE-FFT-based prediction of the effective material behavior of elasto-viscoplastic polycrystals

J Kochmann, S Wulfinghoff, L Ehle, J Mayer… - Computational …, 2018 - Springer
Recently, two-scale FE-FFT-based methods (eg, Spahn et al. in Comput Methods Appl Mech
Eng 268: 871–883, 2014; Kochmann et al. in Comput Methods Appl Mech Eng 305: 89–110 …

A gradient plasticity grain boundary yield theory

S Wulfinghoff, E Bayerschen, T Böhlke - International Journal of Plasticity, 2013 - Elsevier
A strain gradient crystal plasticity theory is presented that accounts for the resistance of grain
boundaries against plastic flow based on an interface yield condition. This theory …

[HTML][HTML] A damage growth criterion for anisotropic damage models motivated from micromechanics

S Wulfinghoff, M Fassin, S Reese - International Journal of Solids and …, 2017 - Elsevier
The field of continuum damage mechanics addresses mathematical models for the
degradation of the mechanical properties of engineering materials, in particular for softening …

[HTML][HTML] A reduced micromorphic single crystal plasticity model at finite deformations. Application to strain localization and void growth in ductile metals

C Ling, S Forest, J Besson, B Tanguy… - International Journal of …, 2018 - Elsevier
A micromorphic single crystal plasticity model is formulated at finite deformations as an
extension of Mandel's classical theory based on a multiplicative decomposition of the …

Gradient crystal plasticity including dislocation-based work-hardening and dislocation transport

S Wulfinghoff, T Böhlke - International Journal of Plasticity, 2015 - Elsevier
This work aims at the formulation of a gradient crystal plasticity model which incorporates
some of the latest developments in continuum dislocation theory and is, at the same time …

An efficient solution scheme for small-strain crystal-elasto-viscoplasticity in a dual framework

D Wicht, M Schneider, T Böhlke - Computer Methods in Applied Mechanics …, 2020 - Elsevier
Computational homogenization schemes based on the fast Fourier transform (FFT) enable
studying the effective micromechanical behavior of polycrystalline microstructures with …

Efficient two-scale FE-FFT-based mechanical process simulation of elasto-viscoplastic polycrystals at finite strains

C Gierden, J Kochmann, J Waimann… - Computer Methods in …, 2021 - Elsevier
The purpose of this work is the development of an efficient two-scale numerical scheme for
the prediction of the local and overall mechanical behavior of polycrystalline materials with …

A thermomechanical finite strain shape memory alloy model and its application to bistable actuators

M Sielenkämper, S Wulfinghoff - Acta Mechanica, 2022 - Springer
This work presents a thermomechanical finite strain shape memory alloy model that utilizes
a projection method to deal with the incompressibility constraint on inelastic strains. Due to …

Dark energy in crystals: prediction of stored energy in polycrystalline aggregates

V Phalke, S Forest, HJ Chang, T Rose… - Journal of Materials …, 2024 - Springer
During the plastic deformation of metallic materials, part of expended mechanical energy
diffuses as heat. The fraction of plastic work converted into heat is called the Taylor–Quinney …

A generalized cohesive zone model and a grain boundary yield criterion for gradient plasticity derived from surface-and interface-related arguments

S Wulfinghoff - International Journal of plasticity, 2017 - Elsevier
In this work, new generalized interface models for gradient plasticity based on the
dislocation density tensor are presented. The first one is a new generalized cohesive zone …