Influence of Specimen Geometry on Crack Propagation and Arrest Toughness
- 1 January 1980
- book chapter
- Published by ASTM International
- p. 89-108
- https://doi.org/10.1520/stp27442s
Abstract
A number of crack propagation experiments on four different specimen geometries were performed in order to investigate the existence of a unique relationship between crack propagation toughness and crack-tip velocity. For one geometry, dynamic finite-element method (FEM) calculations were found to be necessary in order to obtain proper stress-intensity factors, whereas quasi-static FEM-calculations were found to be sufficient for the other geometries. Crack-tip velocities were determined from continuous recordings of crack length versus time, which was measured by an impedance method. The stress-intensity factor and the instantaneous crack-tip velocity were obtained for a number of crack lengths for each experiment. The experimental results do not contradict the hypothesis of a unique relationship between these two quantities at low load levels; neither do they contradict the hypothesis of a geometry-independent crack arrest toughness. At high load levels a deviation from the uniqueness was observed. The height of the specimens was found to influence the crack propagation toughness level at the beginning of deviation from the unique relationship.This publication has 9 references indexed in Scilit:
- Numerical evaluation by FEM of crack propagation experimentsInternational Journal of Fracture, 1980
- Relation Between Crack Velocity and the Stress Intensity Factor in Birefringent PolymersPublished by ASTM International ,1977
- Elastodynamic Near-Tip Stress and Displacement Fields for Rapidly Propagating Cracks in Orthotropic MaterialsJournal of Applied Mechanics, 1975
- Crack arrest in elastic sheetsJournal of the Mechanics and Physics of Solids, 1974
- On the uniqueness of plane elastodynamic solutions for running cracksJournal of Elasticity, 1974
- A dynamic analysis of unstable crack propagation and arrest in the DCB test specimenInternational Journal of Fracture, 1974
- Crack propagation experiments on strip specimensEngineering Fracture Mechanics, 1974
- A note on the stress singularity at a non-uniformly moving crack tipJournal of Elasticity, 1974
- On crack propagation in solidsInternational Journal of Solids and Structures, 1969