Experimental Determination of Dissipated Energy Density as a Measure of Strain-Induced Damage in Composites

Abstract

An approach to characterizing failure behavior and degree of load induced internal damage in composite materials and structures is formulated. This approach is based on a systematic experimental procedure to observe response of composite materials subjected to multiaxial load environment. The energy dissipated by internal failure mechanisms is employed as a measure of internal damage and is characterized by an energy dissipation function, which is identified by means of a deconvolution procedure data provided by NRL's automated in-plane loader. Use of this information as a failure analysis and prediction tool is demonstrated by simulating the structural response of some naval structural components made from several different composite materials. In addition, a general theory for the derivation of the constitutive behavior of the damaged composites is presented.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 17, 1992
Accession Number
ADA250322

Entities

People

  • Gerald E. Nash
  • Irvin Wolock
  • John G Michopoulos
  • Phillip W. Mast
  • Ray W. Thomas
  • Robert Badaliance

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Actuators
  • Composite Materials
  • Databases
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Graphitic Materials
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Reinforced Plastics
  • Structural Components
  • Structural Response
  • Three Dimensional

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Software Engineering.
  • Structural Dynamics.