(1989-07) Husain, Imad Ahmed; El-Zafrany, A.; Cookson, A.
This work dealt with elasto-plastic analysis of 2-dimensional and
axisymmetric problems using the finite-element and boundary-element
techniques. The analysis is based upon a vide range of yield
criteria and hardening rules so as to be suitable for most
engineering materials.
Many accuracy measures have been employed with the boundary-integral
equation derivations, such as isoparametric boundary elements,
singular quadrature, corner models, finite-difference schemes for
internal stress evaluation, high-order integration cells, and the
use of boundary-integral expressions for domain loading terms.
A programming package has been developed vith its own mesh generator
and results plotter. The package has been validated using several
case studies including a benchmark test case recommended by NAFEMS.
The finite-element analysis of elasto-plastic problems proved to be
more stable and reliable than the corresponding boundary-element
analysis.