WIT Press


A Boundary Element Superposition Method For The Evaluation Of Singular Coefficients And Indices In V-notched Plates

Price

Free (open access)

Paper DOI

10.2495/BE940471

Volume

7

Pages

11

Published

1994

Size

714 kb

Author(s)

R.N.L. Smith & D. Delia-Ventura

Abstract

A boundary element superposition method for the evaluation of singular coefficients and indices in V-notched plates R.N.L. Smith" & D. Delia-Ventura* ABSTRACT A series of numerical tests shows the accuracy and efficiency of the two- step superposition approach in evaluating the strength of the stress intensity factor for a V-notch plate. A new and general numerical scheme is described for the determination of powers in the expansion of crack and notch tip fields. The accuracy of this scheme is demonstrated by obtaining estimates of the dominant eigenvalue of V-notches via BEM superposition. INTRODUCTION A variety of techniques have been applied to calculate the behaviour of the stresses in the neighbourhood of a crack or a V-notch. The finite element method (FEM) is an efficient method for solving elliptic boundary value problems. However, when a boundary singularity is present (such as a crack or V-notch) the solution is of poor accuracy. Various modifications to overcome this

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