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Low Cycle Fatigue Crack Propagation in Stainless Steel Under Combined Torsion and Tension |
YU Huichen; SUN Yanguo;XIE Shishu; K. TANAKA |
Beijing Institute of Aeronautical Materials; Beijing 100095 |
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Cite this article:
YU Huichen; SUN Yanguo; XIE Shishu; K. TANAKA. Low Cycle Fatigue Crack Propagation in Stainless Steel Under Combined Torsion and Tension. Acta Metall Sin, 2005, 41(1): 73-.
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Abstract Low cycle fatigue crack propagation tests were
conducted on a circumferentially pre--cracked round
bar of a stainless steel under various combinations of
cyclic torsion and tension. The crack propagation rate was
expressed as a power function of $J$ integral range for both single and
mixed mode. For the same $J$--integral range,
the mode I propagation rate is the highest and
the mode III one is the lowest. The fatigue fracture surface is
macroscopically flat under the conditions of excessive plasticity.
Striations were observed on the fatigue fracture
surface under mixed mode loading, and their
spacing value is equal to the crack propagation rate value,
the same as in mode I case.
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Received: 13 January 2004
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