A convenient method for the strength evaluation of cracked functionally graded material plates under different loadings

As functionally graded material (FGM) plates are widely used in engineering and industrial fields, the fracture strength evaluation of cracked FGM plate becomes increasingly important. However, due to gradation mechanical properties FGM, few analytical methods simple available. In this paper, a convenient method for under different loadings is proposed terms stress intensity factor (SIF) appearing at crack tip. This uses stable relationship singular fields between homogeneous greatly simplify complex SIF calculation process plate. The results show that SIFs tension, bending, three-point bending (experiment) can be obtained conveniently accurately by using two formulas, trends critical also investigated directly even if solution (reference problem) unknown. Comparisons with published theoretical experimental indicated present reliable, precise, practical determine perform prediction.