Dynamic stress intensity factors for homogeneous and smoothly heterogeneous materials using the interaction integral method

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:43

Article

Song, Seong Hyeok ; Paulino, Glaucio H.

关键词: dynamic stress intensity factors (DSIFs);    interaction integral;    non-homogeneous materials;    functionally graded materials (FGMs);   

DOI  :  10.1016/j.ijsolstr.2005.06.102

来源: Elsevier

【 摘 要 】

Dynamic stress intensity factors (DSIFs) are important fracture parameters in understanding and predicting dynamic fracture behavior of a cracked body. To evaluate DSIFs for both homogeneous and non-homogeneous materials, the interaction integral (conservation integral) originally proposed to evaluate SIB for a static homogeneous medium is extended to incorporate dynamic effects and material non-homogeneity, and is implemented in conjunction with the finite element method (FEM). The technique is implemented and verified using benchmark problems. Then, various homogeneous and non-homogeneous cracked bodies under dynamic loading are employed to investigate dynamic fracture behavior such as the variation of DSIFs for different material property profiles, the relation between initiation time and the domain size (for integral evaluation), and the contribution of each distinct term in the interaction integral. (c) 2005 Elsevier Ltd. All rights reserved.

【 授权许可】

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