Title of article :
Application of the inverse elasticity problem to identify irregular interfacial configurations
Author/Authors :
Khodadad، نويسنده , , Mahmud and Dashti Ardakani، نويسنده , , Mohsen، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Abstract :
An inverse elasticity problem is solved to identify the irregular boundary between the components of a multiple connected domain using displacement measurements obtained from an uniaxial tension test. The boundary elements method (BEM) coupled with the particle swarm optimization (PSO) and conjugate gradient method (CGM) are employed. Due to the ill-posed nature of this inverse elasticity problem, and the need for an initial guess of the unknown interfacial boundary when local optimization methods are implemented, a Meta heuristic procedure based on the PSO algorithm is presented. The CGM is then employed using the best initial guess obtained by the PSO to reach convergence. This procedure is highly effective, since the computational time reduces considerably and accuracy of the results is reasonable. Several example problems are solved and the accuracy of obtained results is discussed. The influence of material properties and the effect of measurement errors on the estimation process are also addressed.
Keywords :
boundary element method , Inverse elasticity problem , Interface geometry estimation , conjugate gradient method , particle swarm optimization
Journal title :
Engineering Analysis with Boundary Elements
Journal title :
Engineering Analysis with Boundary Elements