کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
279216 | 1430349 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of T-stress on crack growth under mixed mode I–III loading Effect of T-stress on crack growth under mixed mode I–III loading](/preview/png/279216.png)
For a crack subjected to combined mode I and III loading the influence of a T-stress is analyzed, with focus on crack growth. The solid is a ductile metal modelled as elastic–plastic, and the fracture process is represented in terms of a cohesive zone model. The analyzes are carried out for conditions of small scale yielding, with the elastic solution applied as boundary conditions on the outer edge of the region analyzed. For several combinations of the stress intensity factors KI and KIII and the T-stress crack growth resistance curves are calculated numerically in order to determine the fracture toughness. In all situations it is found that a negative T-stress adds to the fracture toughness, whereas a positive T-stress has rather little effect. For given values of KI and T the minimum fracture toughness corresponds to KIII = 0.
Journal: International Journal of Solids and Structures - Volume 45, Issues 18–19, September 2008, Pages 5181–5188