Stress Field Effects on Dynamic Fracture.
Abstract
The introduction of inertia terms in the theoretical model of thin ring expansion showed that the classical plastic instability concepts, defined in terms of the local strain in the necking region, no longer applied. The introduction of the role of void growth in triggering local necking, through the recently proposed constitutive equation for porous plastic materials allowed this difficulty to be overcome. A criterion based on a critical void volume fraction provided the alternative means to predict failure. This theory was applied to number of configurations (thin ring, thick plate and thick cylinder) under high strain rate loading conditions, and the theoretical results were found to compare favorably with experimental values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1981
- Accession Number
- ADA110779
Entities
People
- Ian M. Fyfe
Organizations
- University of Washington