SEDL / STP / STP969-EB / STP33092S

Approximate Methods for Analysis of Dynamic Crack Growth and Arrest

Nilsson, F
Professor, Uppsala University, Uppsala,

Pages: 8    Published: Jan 1988

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Abstract

Approximate methods that are less time-consuming than finite-element method (FEM) analysis are needed for dynamic crack propagation and arrest calculations. In this context the one-dimensional wave propagation models, where the cracked section is modeled by a flexibility matrix, may be a reasonable alternative. Such models are compared with fully dynamic two-dimensional FEM calculations of experimentally observed crack growth histories in an edge-cracked rectangular sheet. A fairly good agreement is obtained; the discrepancies could mainly be ascribed to differences in the end conditions. The author concludes that spring models are worth further examination in order to make them a practical tool for engineering design analysis.