Completely reversed torsional fatigue failures are reported for two aluminum alloys, 60-40 brass and SAE 4340 steel, in the life range of ½ to 20,000 cycles. Cyclic hysteresis loops were measured and the total plastic strain energy to cause fracture is reported. The results are interpreted using hysteresis energy as a criterion for fatigue damage and also in terms of the Coffin Equation for low cycle fatigue. Both methods of interpretation give good agreement with tests results. For practical purposes, the data is adequately described by substituting shear strains for normal strains in the Coffin Equation.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
TAM R 203
1967-0499
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/111916
Copyright and License Information
Copyright 1961 Board of Trustees of the University of Illinois
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.
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