An updated Lagrangian implicit FEM model for the analysis of large thermo-mechanically coupled hyperelasticviscoplastic deformations of isotropic porous materials is considered. An appropriate framework for constitutive modelling is introduced that includes a stress-free thermally expanded con9guration and a plastically deformed unstressed damaged con9guration. A two-level iterative scheme is e...

A Hadamard instability analysis of the partial differential equations governing a coupled thermo-mechano-chemical system predicts instability of the spinoidal decomposition type as well as instability of the "negative creep" type.

A unilateral contact problem without friction in quasi-coupled thermo-elasticity and with uncertain input data is analysed. The worst scenario method is used to nd the most "dangerous" admissible input data.

Underground rock dynamic disasters are becoming more severe due to the increasing depth of human operations underground. temperature and pressure conditions contribute significantly these disasters. Therefore, it is important understand coupled thermo-mechanical (TM) behaviour rocks for long-term safety maintenance underground tunnelling mining. Moreover, investigation damage, strength failure ...

Purpose – The purpose of this paper is to access performance of existing computational techniques to model strongly non-linear coupled thermo-electric problems. Design/methodology/approach – A thermistor is studied as an example of a strongly non-linear diffusion problem. The temperature field and the current flow in the device are mutually coupled via ohmic heating and very rapid variations of...

A variational formulation of the coupled thermo-mechanical boundary-value problem for general dissipative solids is presented. The coupled thermo-mechanical boundary-value problem under consideration consists of the equilibrium problem for a deformable, inelastic and dissipative solid with the heat conduction problem appended in addition. The variational formulation allows for general dissipati...

A coupled elastoplastic-damage constitutive model taking into account chemo-induced elastoplastic-damage effects for the modeling of coupled chemothermo-hygro-mechanical behavior of concretes at high temperature is proposed in this article. A three-step operator split algorithm for the integration of the rate coupled constitutive equations is developed. Consistent tangent modulus matrices for c...

This paper presents an effective numerical approach for welding process parameter optimization to minimize weld-induced distortion in structures. A numerical optimization framework based on coupled Genetic Algorithm (GA) and Finite Element Analysis (FEA) is developed and implemented for a low and a high fidelity model. Classical weakly coupled thermo-mechanical analysis with thermo-elasto-plast...