Singular perturbation analysis of dynamic fields in a thermoelastic solid with a small surface-breaking crack

• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2006,（5）
• 页码范围: 449-454
• 页数: 6页
• 语种: 英文

摘要

An asymptotic analysis is presented for a dynamic problem of a semi-infinite isotropic thermoelastic solid with a small surface breaking crack. The exterior surface of the solid is subjected to a series of short thermal pulses. The crack surface is traction free and an ideal thermal contact is assumed across the crack. The stress intensity factor is asymptotically evaluated as a function of the crack depth and time. The effect of a boundary layer associated with the diffusive term is identified. The theoretical model is supplied with numerical simullations.