SYMPOSIA PAPER Published: 01 January 1977
STP35558S

Analysis of Stable and Catastrophic Crack Growth Under Rising Load

Source

Some metals exhibit slow crack growth prior to instability under rising load. This paper is concerned with an elastic-plastic finite element plane-stress analysis of stable and catastrophic crack growth in a center-cracked panel of a ductile material, subjected to a monotonically increasing applied stress. The stable crack growth phenomenon is modeled by incorporating a local failure criterion in the stress-analysis procedure. An automatic reidealization procedure is developed to refine the finite element mesh at the new crack-tip position before external load is increased. The method is applied to study the crack-growth behavior of geometrically similar panels of different material stress-strain curves, and results are compared with experiment. The effects of some important parameters on crack growth and stability under rising load are discussed.

Author Information

Varanasi, SR
Stress and Fatigue Research, Boeing Commerical Airplane Company, Seattle, Wash.
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Details
Developed by Committee: E08
Pages: 507–519
DOI: 10.1520/STP35558S
ISBN-EB: 978-0-8031-4703-4
ISBN-13: 978-0-8031-0356-6