Accession Number:

ADA164392

Title:

Cumulative Damage Model for Advanced Composite Materials.

Descriptive Note:

Final technical rept. Aug 83-Apr 85 on Phase 3,

Corporate Author:

DYNA EAST CORP PHILADELPHIA PA

Report Date:

1985-10-15

Pagination or Media Count:

278.0

Abstract:

This report represents the details of a methodology in which cumulative damage in composite laminates is mathematically modeled. The basic concept adopted in the theoretical development is to regard the accumulation of damage in laminates as a load andor time dependent process. The process begins with the initiation of sublaminate cracks at locations where dominating material flaws exist under sustaining load, then, thus, the requirement of the model is to be able to describe the process and thereby relate the laminate strength stiffness, and service life properties as a function of loading history. In this research program, the cumulative damage model is developed from five stages of effort Numerical, experimental, theorization, simulation, and predictioncorrelation. Keywords Composite materials Graphite-epoxy laminates Matrix cracks Edge delamination Fracture mechanics Strain energy rate Random flaw distribution Stochastic processes.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE