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Effect of R ratio and ΔK level on the hysteretic energy dissipated during fatigue crack propagation
The evolution of U, the cyclic work to produce a unit area of fatigue crack, with respect to the R ratio and the Delta K level has been measured for a 2024-T351 Al alloy. The value of U reaches a constant minimum level for Delta K values greater than a critical level, Delta K sub cr . Delta K sub cr...
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Published in: | Scripta metallurgica 1987-08, Vol.21 (8), p.1045-1049 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The evolution of U, the cyclic work to produce a unit area of fatigue crack, with respect to the R ratio and the Delta K level has been measured for a 2024-T351 Al alloy. The value of U reaches a constant minimum level for Delta K values greater than a critical level, Delta K sub cr . Delta K sub cr decreased as R increased. The value of U decreased for Delta K < Delta K sub cr . There is some mechanical energy loss at low R due to crack surface contact. 12 ref.--D.O.N. |
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ISSN: | 0036-9748 |
DOI: | 10.1016/0036-9748(87)90247-X |