[HTML][HTML] A variational approach to effective models for inelastic systems

G Jezdan, S Govindjee, K Hackl - International Journal of Solids and …, 2024 - Elsevier
Given a set of inelastic material models, a microstructure, a macroscopic structural geometry,
and a set of boundary conditions, one can in principle always solve the governing equations …

Experiment and simulation study on vibration control of an ancient pagoda with damping devices

T Li, S Wang, T Yang - … Journal of Structural Stability and Dynamics, 2018 - World Scientific
In order to choose an effective method for improving the seismic performance of an ancient
pagoda called the Small Wild Goose Pagoda, 12 damping devices of varying properties are …

On the cyclic stability of the thermomechanical behavior of NiTi shape memory cylindrical actuators

JS Owusu-Danquah, AF Saleeb - European Journal of Mechanics-A/Solids, 2017 - Elsevier
The cyclic performance of cylindrical SMA actuators are investigated, taken into account the
individual effects of the (1) selected SMA material,(2) geometric configuration of the actuator …

Modeling the cyclic behavior of shape memory alloys

J Waimann, P Junker, K Hackl - Shape Memory and Superelasticity, 2017 - Springer
The phenomenon of functional fatigue occurs during cyclic loading of pseudoelastic shape
memory alloys. We model this effect by considering an irreversible martensitic volume …

A phenomenological model for the simulation of functional fatigue in shape memory alloy wires

T Bartel, M Osman, A Menzel - Meccanica, 2017 - Springer
In this contribution, a modelling framework for functional fatigue in shape memory alloy wires
is introduced. The approach is in particular designed to reproduce the effective response …

Variational modeling of temperature induced and cooling-rate dependent phase transformations in polycrystalline steel

J Waimann, S Reese - Mechanics of Materials, 2022 - Elsevier
Phase transformations in steel have a high impact on the material properties. The material is
modified by a changed stiffness as well as residual stresses which are a result of …

Variational modeling and finite-element simulation of functional fatigue in polycrystalline shape memory alloys

J Waimann, K Hackl, P Junker - Journal of Optimization Theory and …, 2020 - Springer
Based on our previous works, we present the finite-element implementation of an energy-
based material model that displays the effect of functional fatigue of shape memory alloys …

Modeling the material behavior of heterogeneous materials considering a two‐scale FE–FFT‐based simulation framework

A Schmidt, C Gierden, J Waimann, S Reese - PAMM, 2023 - Wiley Online Library
In various engineering applications, components subjected to high mechanical or multi‐
physical loads such as thermal, thermo‐mechanical, or electro‐thermal loads are …

Variationelle Modellierung irreversibler Effekte in polykristallinen Formgedächtnislegierungen

J Waimann - 2018 - hss-opus.ub.ruhr-uni-bochum.de
Shape memory alloys are attractive materials for industrial applications. A requirement for
this usage are material models which are able to predict the microstructural processes. The …

Variational material modeling of the transformation induced plasticity in polycrystalline steel

J Waimann, S Reese, P Junker - … Mechanik-European Journal …, 2020 - journals.ub.ovgu.de
The effect of transformation induced plasticity (TRIP) describes the coupling of plastic
deformations and solid/solid phase transformations in steel. A result of this complex …