A Study of Composite Material Damage Induced by Laser-Supported Detonation Waves
Abstract
A model for ductile fracture is applied to the analysis of failure modes on a carbon-phenolic composite, loaded at the surface by a laser-supported detonation wave. It is demonstrated that for a 100 joule/cm square, 10 ns pulse the model predicts failure of the sample as the third reflected tensile stress wave propagates through it. It is argued that high-intensity, short pulses are capable of producing damage efficiently in composites, but that with LSD surface loading rather than direct laser-target interaction the rapid stress relief required for front-surface spall failure is difficult to achieve. The attenuation of stress waves in the composite due to dispersion and viscous dissipation, the effects of defects in the virgin material, and the nucleation and growth parameters for cracks in different composite materials are critical factors in the analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1976
- Accession Number
- ADA033629
Entities
People
- G. A. Gurtman
- J. R. Triplett
Organizations
- Utility Systems Science and Software (United States)