کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
808067 | 905669 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mode I fracture initiation in limestone by strain energy density criterion Mode I fracture initiation in limestone by strain energy density criterion](/preview/png/808067.png)
The critical mode I stress intensity factor obtained from fracture tests on laboratory specimens is often used as fracture toughness in brittle and quasi-brittle materials. However, considerable variations in the experimental results reported for a given material may suggest the dependency of critical mode I stress intensity factor on the geometry and loading conditions of the test specimen. The main purpose of this paper is to study the effect of T-stress on the critical mode I stress intensity factor of brittle and quasi-brittle materials. The minimum strain energy density criterion was revisited to take the effect of T-stress into account. The results obtained were then compared with a series of experimental results reported for limestone. It is shown as a result that the formulation presented in this paper is capable of estimating the experimental results in a satisfactory manner.
Journal: Theoretical and Applied Fracture Mechanics - Volume 57, Issue 1, February 2012, Pages 14–18