Research Study to Define the Critical Failure Mechanisms in Notched Composites under Compression Fatigue Loading.
Abstract
Analytical and experimental studies of identify the dominant failure mechanisms for compression fatigue of notched composite laminates have been conducted. The effects of stacking sequence and matrix material on damage growth as well as failure mechanisms under compression fatigue loading are reported. Two types of resin materials and four kinds of laminate layups have been considered. Two of the stacking sequences are fiber dominated and two are quasi-isotropic. Ultrasonic C-scans and photomicrographic studies have been utilized for experimental observations. An analytical methodology developed for the study of tension fatigue of notched laminates has been modified to obtain patterns of damage growth under quasi-static load by increasing it gradually in steps. For each step increase in load, a finite element stress analysis is performed and intralaminar and/or interlaminar failures in the elements are predicted.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1981
- Accession Number
- ADA113654
Entities
People
- A. P. Nagarkar
- B. W. Rosen
- R. B. Pipes
- R. Walsh