| タイトル | Modelling and measurement of crack closure and crack growth following overloads and underloads |
| 著者（英） | Dexter, R. J.; Davidson, D. L.; Hudak, S. J. |
| 著者所属（英） | Southwest Research Inst. |
| 発行日 | 1989-01-01 |
| 言語 | eng |
| 内容記述 | Ignoring crack growth retardation following overloads can result in overly conservative life predictions in structures subjected to variable amplitude fatigue loading. Crack closure is believed to contribute to the crack growth retardation, although the specific closure mechanism is dabatable. The delay period and corresponding crack growth rate transients following overload and overload/underload cycles were systematically measured as a function of load ratio and overload magnitude. These responses are correlated in terms of the local 'driving force' for crack growth, i.e. the effective stress intensity factor range. Experimental results are compared with the predictions of a Dugdale-type (1960) crack closure model, and improvements in the model are suggested. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 89A49739 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/361930 |
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