The Mechanics of Dynamic Fracture
Abstract
Some concepts available for interpreting dynamic fracture phenomena are reviewed. These include the mechanical characterization of crack edge fields, energy variations associated with crack growth, and experimental observations relevant to the points raised. More recently developed and still incomplete ideas on the influence of crack tip plasticity, material strain rate sensitivity and three dimensional effects are also outlined. Dynamic fracture is a branch of the engineering science of fracture mechanics concerned with fracture phenomena on a time scale for which inertial resistance of the material to motion is significant. The deformable body typically contains a dominant crack or other stress concentrating defect, and the phenomena of primary interest are those associated with conditions for the onset of extension of a crack or its arrest. Material inertia can have a significant effect in a variety of ways. Load transfer from the rapidly loaded boundary of a body to the region of a crack edge can occur by means of stress waves. Likewise, a rapidly running crack emits stress waves which can be geometrically reflected or scattered back to the region of the crack.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA243779
Entities
People
- Lambert Ben Freund
Organizations
- Brown University