Accession Number:

ADA250322

Title:

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

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1992-04-17

Pagination or Media Count:

76.0

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 NRLs 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.

Subject Categories:

  • Laminates and Composite Materials
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE