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Gao, Hongfen; Cheng, Yumin

A complex variable meshless manifold method for fracture problems. (English) Zbl 1267.74124

Int. J. Comput. Methods 7, No. 1 (2010).
Summary: Based on the complex variable moving least-squares (CVMLS) approximation and the finite cover theory, the complex variable meshless manifold method (CVMMM) for fracture problems is presented in this paper. The CVMMM employs two cover systems which are the mathematical cover system and the physical cover system. The shape function in the CVMMM is derived with the CVMLS approximation and the finite cover theory. The finite cover theory is used to model cracks which lead to interior discontinuous displacements. At the tip of a crack of a problem, we use the analytical solution near the tip of a crack to extend the trial function of the CVMMM, then the corresponding approximation function is obtained. From the minimum potential energy principle, the corresponding formulae of the CVMMM for fracture problems are presented. Some numerical examples are presented to demonstrate the method in this paper.

Cited in 10 Documents

MSC:

74S30 Other numerical methods in solid mechanics (MSC2010)
74S70 Complex-variable methods applied to problems in solid mechanics
74R10 Brittle fracture

Keywords:

complex variable meshless manifold method; finite cover theory; complex variable moving least-squares approximation; crack; stress intensity factor
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