کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
771477 | 897637 | 2006 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Green’s functions for the T-stress of small kink and fork cracks Green’s functions for the T-stress of small kink and fork cracks](/preview/png/771477.png)
Green’s functions for T-stresses used so far are restricted to symmetric crack problems, for instance, edge cracks normal to the free surface of a rectangular plate. In the case of more complicated cracks, component geometries, and loading cases, a more general formulation of the Green’s function has to be used. Such a relation was recently proposed by the authors. As an example, Green’s functions for T-stresses acting at the tip of a kinked crack were determined by extending the Cotterell–Rice procedure. Application to the edge-cracked plate revealed an excellent agreement of local T-stress with results obtained directly from FE computations. A simple approximate relation with a high accuracy for kink angles of up to 30° is proposed that allows an estimate of the T-stress from the stress field of the unkinked crack. It is shown that the T-stress of a kinked crack under pure mode-I loading can be computed roughly as the difference of the radial and tangential stresses of the unkinked crack at the tip of the kink.
Journal: Engineering Fracture Mechanics - Volume 73, Issue 10, July 2006, Pages 1426–1435