## Abstract Physical optics (PO) is a wellβknown asymptotic technique for evaluating the fields scattered from an object. Evaluation of a surface integral forms the crux of this technique. In this paper, the PO integral is formulated for planeβwave incidence and farβfield observation. Then, this in
A physical interpretation of the M-integral for a griffith crack
β Scribed by John Short
- Publisher
- Springer Netherlands
- Year
- 1987
- Tongue
- English
- Weight
- 114 KB
- Volume
- 34
- Category
- Article
- ISSN
- 1573-2673
No coin nor oath required. For personal study only.
β¦ Synopsis
The relationship between the mode I energy release rate G_ and the mode i I stress intensity factor K I is well known.
Eshelby [i], for example, derived the result
π SIMILAR VOLUMES
## A B S T R A C T A brittle crack is in a state of "semi-stable" equilibrium when its stress intensity factor, K0, is equal to the fracture toughness, Kc; any perturbation which makes K o > K c will cause crack extension. The influence of the actual value of this perturbation on the resulting mot
The equivalence of the crack extension criteria associated with the Griffith and Elliott crack models is demonstrated, the underlying reasons for the equivalence being discussed by means of the path independent J integral that has been used extensively in other considerations of crack problems.