Three-dimensional elastic-plastic j-integral calculations for semielliptical surface cracks in a tensile plate
✍ Scribed by G.P. Nikishkov; S.N. Atluri
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 495 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
Using a finite element method, in conjunction with an equivalent domain integral approach, the elastic-plastic crack-tip J-integral is computed for semielliptical surface flaws in a plate under a remote tensile load. The computed elastic-plastic values of the J-integral are compared to the elastic ones. It is concluded that a linear elastic fracture mechanics approach can be used for semielliptical cracks of relative depth of a/r = 0.25 and aspect ratio of c/a 5 3, up to load levels of 0.9cr, with an error of no more than 10% in the (equivalent) elastic-plastic stress intensity factor. A simple empirical equation for evaluating the elastic-plastic J-integral for surface flaws is proposed.