Mechanical Failure Modes of Composite Plastic Bonded Explosives

Abstract

The initial part of the uniaxial stress versus strain response in compression can be described in terms of an undamaged modulus, Eo, a peak stress, sigma(m) (a failure stress), and a strain at the peak stress, epsilon(m) (a failure strain). Sigma(m) increases in proportion to Eo and epsilon(m) is approximately constant with changes in temperature and strain rate for all of the composites considered. In addition, sigma(m) increases in proportion to Eo(exp 1/2) and epsilon(m) is proportional to 1/Eo(exp 1/2) for larger values of Eo for some of the composites. Brittle fracture is often, but not always, observed for the larger values of Eo. These results suggest two separate failure modes, and possible mechanisms for each mode are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1998
Accession Number
ADA360047

Entities

People

  • Donald A. Wiegand

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Counter IED
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Compressive Strength
  • Engineering
  • Explosives
  • Failure Mode And Effect Analysis
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Particle Size
  • Plastic Bonded Explosives
  • Polymer Matrix Composites
  • Rdx
  • Strain Rate
  • Stress Strain Relations
  • Stresses

Readers

  • Data Mining and Knowledge Discovery.
  • Mathematics or Statistics
  • Structural Health Monitoring of Composite Structures.