Transient analysis of a propagating crack with finite length subjected to a horizontally polarized shear wave
學年 87
學期 2
出版（發表）日期 1999-04-01
作品名稱 Transient analysis of a propagating crack with finite length subjected to a horizontally polarized shear wave
作品名稱（其他語言）
著者 Ing, Yi-shyong; Ma, Chien-ching
單位 淡江大學航空太空工程學系
出版者 Kidlington: Pergamon
著錄名稱、卷期、頁數 International Journal of Solids and Structures 36(30), pp.4609-4627
摘要 In this study, the transient response of a finite crack subjected to an incident horizontally polarized shear wave and then propagated with a constant speed in an unbounded elastic solid is investigated. Initially, the finite crack with crack length l is stress-free and at rest. At time t = 0, an incident horizontally polarized shear wave strikes at one of the crack tips and will arrive at the other tip at a later time. Then, two crack tips propagate along the crack tip line with different velocities as the corresponding stress intensity factors reach their fracture toughness. The correspondent configuration is shown in Fig. 1. In analyzing this problem, diffracted waves generated by two propagating crack tips must be taken into account and it makes the analysis extremely difficult. In order to solve this problem, the transform formula in the Laplace transform domain between moving and stationary coordinates is first established. Complete solutions are determined by superposition of proposed fundamental solutions in the Laplace transform domain. The fundamental solutions to be used are from the problems of applying exponentially distributed traction and screw dislocation on crack faces and along the crack tip line, respectively. The exact transient solutions of dynamic stress intensity factor for the first few diffracted waves that arrive at two crack tips are obtained and expressed in compact formulations. Numerical calculations of dynamic stress intensity factors for both tips are evaluated and the results are discussed in detail.
關鍵字
語言 en
ISSN 0020-7683
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Ma, Chien-ching
審稿制度
國別 GBR
公開徵稿
出版型式 紙本
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