Elastic-plastic Simulation Of Plate With A
Blunt Slit Subjected To Uni-axial Tension
Author(s)
S. Ohtaki, S. Kobayashi & T. Yamamoto
Abstract
By the progress of a computer, the elastic-plastic simulation becomes easier
under the mathematical assumption. However, results of the numerical analysis
of the elastic-plastic problem depend on the assumption of yield conditions,
definition of yield points and approximation of the stress-strain diagram of the
material and other factors. The best way to testify the precision is to compare the
numerical results with the experimental ones. In this paper, the authors study a
numerical simulation of the elastic-plastic problem under plane stress by the
finite element method. Calculation is executed by using FEM software LUSAS.
The plastic theory is based on the strain incremental one, and Prandtl-Reuss
equations are used. As a yield condition, von Mises’ one is adopted. The
definition of the yield stress is determined by the proportional limit. Three
approximations of stress-strain diagrams are selected. To verify the
numerical results, an experiment is conducted under the same condition by the
photoelastic coating method. However, it is not easy to evaluate the stress
distributions from the isochromatic fringes. A numerical example of thin plate
with a blunt slit subjected to uni-axial tension is presented. Stress distributions
in the minimum cross-section and stress contours are presented and examined.
Keywords: structural analysis, finite element method, elastic-plastic problem,
stress concentration.
Keywords
structural analysis, finite element method, elastic-plastic problem,
stress concentration.
Related Book
Other papers in this volume
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