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| The finite element simulating calculation of surface crack growth under quasi static loading |
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| DOI：10.7511/jslx19964063 |
| KeyWord:surface crack,fracture criterion,stable crack growth,finite element simulating calculation., |
| Chen Jiang Lou Yiqing |
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| Abstract: |
| The prediction of geometric features of surface crack growth under quasi static loading is recognized as one of the attractive projects in LBB assessment. Since the current fracture criteria do not take the variation of actual fracture resistance in the front of surface crack into account, the simulating calculations could not predict the true geometric features of surface crack growth under quasi static loading very well. In this paper, a new fracture criterion of variable resistance, which will take actual fracture resistance under different stress state into account, is firstly proposed by the authors. Then, the geometric features of surface crack growth under quasi static loading are predicted with 3 D finite element simulation. Moreover, the various parameters during crack growth process are calculated simultaneously. The calculated results are in good agreement with experimental values obtained from multi specimen testing. |
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