Thermal shock waves induced by a moving crack

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910349· OSTI ID:5727055

Tzou, D Y ^[1]

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1. Univ. of New Mexico, Albuquerque (United States)

The near-tip behavior of the thermal field around a moving crack is investigated analytically in this work. The thermal field is characterized by a thermal Mach number defined as the ratio between the linear speed v of the moving crack and the heat propagation speed C in the solid. Mathematically, M = {upsilon}/C. In the subsonic range with M < 1, a detailed comparison with the thermal diffusion model is made. In the transonic and the supersonic ranges with M{ge}1, thermal shock waves, which separate the heat affected zone from the thermally undisturbed zone, are shown to exist in the physical domain. A swinging phenomenon for the transition from the subsonic to the supersonic ranges. Also, the r dependency of the near-tip temperature is found to be the same as that of the near-tip heat flux vector. It transits from r{sup 1/2}, r, to r{sup 2} as the thermal Mach number transits from the subsonic, transonic, to the supersonic ranges.

• OSTI ID: 5727055
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 112:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer &amp; Fluid Flow
CALCULATION METHODS
CRACK PROPAGATION
FLUID FLOW
HEAT AFFECTED ZONE
MATHEMATICAL MODELS
SHOCK WAVES
SUBSONIC FLOW
SUPERSONIC FLOW
THERMAL SHOCK
TRANSONIC FLOW
ZONES