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- W2023753820 abstract "An infinite linear elastic body containing a semi-infinite crack is loaded by a planar antiplane stress pulse parallel to the crack. The stress wave strikes the crack at time t=0 and at some arbitrary later time tf, the crack begins to extend straight ahead with constant speed vo. After some later tb, the crack suddenly stops, then kinks and propagates with constant speed vc, making an angle δ with the original crack. A superposition scheme is used to construct the exact full-field solution of the propagating crack. The full-field solution for stresses for the constant speed propagating crack with a delay time tf is found to be the Mode III analog of Baker’s problem in Mode I plus the stress pulse, and the displacement on the crack faces behind the moving crack tip is just the solution of Baker’s problem when expressed in crack tip coordinates and is independent of the delay time tf. When the crack suddenly stops, the stress field, which is radiated out from the stopped crack tip, corresponds to the stationary crack stress field of a crack whose crack tip has been at the stopped crack position for all time. The dynamic stress intensity factor at the kinked crack tip is then obtained by using a perturbation method. The region of the stress intensity factor controlled field is investigated for both stationary and propagating cracks. It is found that this region depends on the loading conditions and which stress components are considered. The region also depends on the crack tip speed and will contract as the crack tip speed increases." @default.
- W2023753820 created "2016-06-24" @default.
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- W2023753820 date "1988-03-01" @default.
- W2023753820 modified "2023-09-23" @default.
- W2023753820 title "Initiation, Propagation, and Kinking of an Antiplane Crack" @default.
- W2023753820 doi "https://doi.org/10.1115/1.3173615" @default.
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