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    題名: Transient analysis of a mode-III crack propagating in a piezoelectric medium
    作者: Ing, Yi-Shyong;Wang, Mau-Jung
    貢獻者: 淡江大學航空太空工程學系
    關鍵詞: Boundary conditions;Crack propagation;Elasticity;Fracture mechanics;Laplace transforms;Loads (forces);Stress analysis;Stress intensity factors;Surface waves;Dynamic fractures;Electric displacement intensity factors;Energy release rates;Piezoelectric materials
    日期: 2004-11
    上傳時間: 2013-03-20 16:25:26 (UTC+8)
    出版者: Kidlington: Pergamon
    摘要: The transient response of a semi-infinite, propagating crack subjected to dynamic anti-plane concentrated loading in a piezoelectric medium is investigated. A new fundamental solution for the piezoelectric material is proposed and the transient response of the propagating crack is determined by superposition of the fundamental solution in the Laplace transform domain. Exact analytical transient solutions for the dynamic stress intensity factor, the dynamic electric displacement intensity factor, and the dynamic energy release rate are obtained by using the Cagniard method of Laplace inversion and are expressed in explicit forms. The results indicate that the dynamic intensities of a propagating crack can be represented by the product of a universal function and the corresponding solution for a stationary crack. It is also found that the dynamic stress intensity factor and the dynamic energy release rate go to zero as the propagating speed approaches the Bleustein–Gulyaev piezoelectric surface wave speed under this particular boundary condition.
    關聯: International Journal of Solids and Structures 41(22-23), pp.6197-6214
    DOI: 10.1016/j.ijsolstr.2004.05.019
    顯示於類別:[航空太空工程學系暨研究所] 期刊論文

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