Abstract:

The two-dimensional generalized J-integral of mixed modes for stiffened plates is derived by means of principle of virtual work and constitutive equations as Eq. 4. The relationships between the two components of the generalized J-integral （J₁ and J₂） and the stress intensity factors （K1₁and K₂） are also established as Eqs. 13,14.The convergency and path-independent property of the J-integral are evident by the given formulas. According to the above-mentioned relations, the stress intensity factors are calculated with two different kinds of finite elements. The results obtained by these two kinds of elements are in good agreement.