A NUMERICAL-SIMULATION OF FATIGUE GROWTH OF MULTIPLE SURFACE INITIALLY SEMICIRCULAR DEFECTS UNDER TENSION

被引：20

作者：

LIN, XB ^{[1
]}

SMITH, RA ^{[1
]}

机构：

[1] UNIV SHEFFIELD,DEPT MECH & PROC ENGN,SHEFFIELD S1 4DU,S YORKSHIRE,ENGLAND

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 1995年 / 62卷 / 03期

关键词：

D O I：

10.1016/0308-0161(94)00021-A

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The shape development of a row of five small initially semicircular surface defects through the thickness of a plate under tension is numerically predicted by the step-by-step finite element simulating technique developed by the present authors. Fatigue growth of these cracks during pre-coalescence, coalescence and post-coalescence periods is examined in detail. The fatigue crack growth of a single surface crack with the same initial size is also simulated and compared with that of the multiple crack configuration. The comparison shows that the fatigue growth of each individual defect is almost independent prior to coalescence and the interaction between them is very limited even as they approach each other very closely. The fatigue crack growth curve predicted by the numerical technique is compared with those obtained by the ASME Pressure Vessel Code and the 'no interaction and immediate transition (NIIT)' simplified method. The results show that the two simplified estimations are more conservative than that of the present numerical simulating method.

引用

页码：281 / 289

页数：9

共 12 条

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