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Finite-Element Analysis of Current-Induced Thermal Stress n a Conducting Sphere

Submitted by hasanzhong on
research
plastic deformation
Pb-free solder
electronic interconnects
finite-element modeling

Understanding the electrothermal-mechanical behavior of electronic inter-

connects is of practical importance in improving the structural reliability of

electronic devices. In this work, we use the finite-element method to analyze

the Joule-heating-induced thermomechanical deformation of a metallic sphere

that is sandwiched between two rigid plates. The deformation behavior of the

sphere is elastic–perfectly plastic with Young’s modulus and yield stress

decreasing with temperature. The mechanical stresses created by Joule

Thermodynamic model for strain-induced crystallization in rubber - Eccomas

Submitted by Joachim Guilie on
research
rubber
Constitutive model
Micro-sphere
Strain induced crystallization
Cyclic
Cristallisation sous contrainte

Natural rubber (NR) is known to crystallize under strain (SIC) so that NR samples subjected to loading-unloading cycles exhibit hysteresis. A brief review of the numerous experiments conducted on this material is given. Detailed information on the microstructure is therefore available, particularly simultaneous measurements of stress versus elongation and

Quick start - strains from displacements in triangular mesh

Submitted by Samarth Raut on
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Computational Mechanics Forum
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shell elements
membrane theory
finite strains

Hello,

  I need suggestions/advice regarding quick starting point for getting strains (Green-Lagrangian) from displacement vector field defined over nodes of a triangular mesh ?

I understand that this is a well established theory, however, I was wondering if I can avoid reinventing the wheel !

Can someone help  me regarding which would be the fastest way to get there ( compute strains )? 

Thanks, 

FEM versus FFT

Submitted by DoQuangHuy on
research
computational mechanics
numerical methods
homogenization
FEM
FFT
micomechanics

Dear all,

In micomechanics, homogenization of heterogeneous
materials based on FEM is traditional. Homogenization based on FFT technique has been recently found (in many literatures) to have much more advantages
in term of accuracy, computational cost and resource consumption.

I am wondering why FEMs are still
widely used in education, research, and industries of
generally
computational
mechanics ?

Please could anyone help me to clarify
my question?

Thanks

Boundary conditions and gradient discontinuity in lower-order gradient plasticity

Submitted by Amit Acharya on
research
Gradient Plasticity
evolution problem

Amit Acharya, Huang Tang, Sunil Saigal, John L. Bassani, On boundary conditions and plastic strain-gradient discontinuity in lower-order gradient plasticity, Journal of the Mechanics and Physics of Solids, 52 (2004) 1793 – 1826

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