University of Illinois Urbana-Champaign

Failure analysis of microflawed ductile matrix materials

Frishmuth, Ronald E.

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https://hdl.handle.net/2142/112114

Description

Title
Failure analysis of microflawed ductile matrix materials
Author(s)
Frishmuth, Ronald E.
Issue Date
1974-04
Keyword(s)
  • Failure Analysis
  • Microflaw
  • Ductile Matrix
Abstract
It is shown in this study that linear elastic fracture mechanics techniques do not provide a consistent geometry-independent means of predicting failure in microflawed ductile matrix materials. Several aspects of microflawed material behavior during fracture testing suggest that considerable plastic behavior occurs on the microscale in microflawed materials. It is suggested that limit analysis techniques applied first on the microscale then extended to the macroscale may provide a consistent means of failure prediction. Three-dimensional limit surfaces are developed for several types of microflawed materials. Comparison of these limit criteria with currently available theories and experimental data on microflawed materials in the absence of macroscale notches shows that the proposed theory is valid for smooth material failure predictions. Subsequent extension of the microscale limit surfaces to continuum macroscale structural analysis shows that the proposed theory will provide an upper bound failure prediction. It is also shown that linear elastic fracture mechanics methods will provide a lower bound failure prediction.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 384
  • 1974-6006
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112114
Sponsor(s)/Grant Number(s)
Advanced Research Projects Agency, ARPA Order No. 2169, 74/04
Copyright and License Information
Copyright 1974 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.