ON THE IMPACT FATIGUE CRACK GROWTH BEHAVIOUR OF METALLIC MATERIALS |
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| Authors: | T. Tanaka H. Nakayama K. Kimura |
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| Affiliation: | Faculty of Science and Engineering, Ritsumeikan University, Kyoto 603.;Faculty of Junior College of Automobile Industry, Osaka Industrial University, Osaka 574.;Toyota Motor Co. Ltd, Toyoto 471, Japan |
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| Abstract: | The impact fatigue crack growth characteristics of a low carbon steel and an aluminium alloy were studied. An impact fatigue testing machine of the Hopkinson bar type was used in these experiments to conduct a series of crack growth tests under simple impact stresses. The following characteristics of impact fatigue crack growth behaviour were revealed: (1) crack growth rate is higher in impact fatigue than in non-impact fatigue; (2) crack opening ratio in impact fatigue takes a higher value than in non-impact fatigue; (3) crack tip plastic zone size is smaller in impact fatigue than in non-impact fatigue. |
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