WIT Press


Simulation On Non-uniform Velocity Dynamic Crack Growing By TDBEM

Price

Free (open access)

Paper DOI

10.2495/BE990021

Volume

25

Pages

10

Published

1999

Size

794 kb

Author(s)

Zhenhan Yao, Zhihong Zhou & Bo Wang

Abstract

The time-domain dual boundary element method (TDBEM), due to its single-region feature, has been successfully used for simulating crack growth problem M. However the previous work pay little attention to weakly singular integration in TDBEM, which may result in error about several percent ^. To improve the accuracy of numerical integration, first, the quadratic or biquadratic equations have been derived to find out weakly singular points in an elerm nt, and the element is divided into several integration sections according to he singular points. Each section only has one singular point at the end. Then, a function transformation has been introduced into weakly singular integration of each section to eliminate the singularity. The method is turned out to

Keywords