University of Illinois Urbana-Champaign

Mechanics of fatigue damage and degradation in random short fiber composites part i damage evolution and accumulation part ii analysis of property degradation

Wang, S.S.; Chim, E.S.M.; Suemasu, H.

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https://hdl.handle.net/2142/112210

Description

Title
Mechanics of fatigue damage and degradation in random short fiber composites part i damage evolution and accumulation part ii analysis of property degradation
Author(s)
  • Wang, S.S.
  • Chim, E.S.M.
  • Suemasu, H.
Issue Date
1985-01
Keyword(s)
  • Short Fiber Composites
  • Damage Evolution
  • Property Degradation
Abstract
Cyclic fatigue damage in random short-fiber composites is studied experimentally and analytically. In the experimental phase of the study, the fatigue damage is observed to involve various forms of microcracking, originated from microscopic stress concentrators in the highly heterogeneous microstructure. In the analytical portion of the study, a probabilistic treatment of the microcracks is conducted to evaluate the statistical nature of the microscopic fatigue damage. The density and cumulative distribution of microcrack lengths are found to follow the well-known Weibull-form functions, and microcrack orientation density and cumulative distribution have expressions of a fourth-order power form of the cos8 function. Fatigue damage evolution and accumulation in the random short-fiber composite are analyzed in detail through the development of probabilistic microcrack density and distribution functions during the cyclic loading history.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 470
  • 1985-6001
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112210
Sponsor(s)/Grant Number(s)
Office of Naval Research 85/01; Owens Corning Fiberglass Corporation 85/01 N000 14 79 C 0579 85/01
Copyright and License Information
Copyright 1985 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.