Stress Field Variations during Dynamic Loading
Abstract
An understanding of and the ability to analytically predict the stress and strain field ahead of a crack tip is an essential portion of understanding the fracture process. In the case of dynamic loading induced fracture, fracture may be divided into three broad categories: (1) fracture caused by a single stress wave or a small number of stress wave interactions, (2) stress wave dominated fractures caused by the complex combinations of initial, refractive and reflective stress waves and (3) fractures which occur after the kinetic energy associated with stress wave interactions is negligible. The current work examines the fracture of a three point bend specimen of A517 steel which fails by stress wave dominated brittle fracture. The Mode I stress contours during the dynamic loading transient are examined in detail. Five distinct Mode I stress contour patterns caused by the continual interactions of stress waves with increasing time are observed to occur prior to fracture.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 18, 1991
- Accession Number
- ADA242121
Entities
People
- Virginia G. Degiorgi
Organizations
- United States Naval Research Laboratory