AXISYMMETRICAL THERMOELASTIC BEHAVIOR FOR A NONHOMOGENEOUS MEDIUM WITH A PENNY-SHAPED CRACK
作者:
Sang-Pyo Jeon, Yoshinobu Tanigawa,
期刊:
Journal of Thermal Stresses
(Taylor Available online 1999)
卷期:
Volume 22,
issue 8
页码: 781-804
ISSN:0149-5739
年代: 1999
DOI:10.1080/014957399280652
出版商: Informa UK Ltd
关键词: Axisymmetrical Problem;Crack Problem;Infinite Body;Nonhomogeneous Medium;Thermal Stress Intensity Factor;Thermoelasticity;Thick Plate
数据来源: Taylor
摘要:
Axisymmetrical thermoelastic singular stress problems for a nonhomogeneous infinite body and thick plate are considered, theoretically. It is assumed that the nonhomoge neous material properties of shear modulus of elasticity G, the coefficient of linear thermal expansion alpha, and the thermal conductivity lambda vary with the axial coordinate z according to the power product form. As an analytical model, a nonhomogeneous infinite body and thick plate with a penny-shaped crack subject to an arbitrarily distributed axisymmetrical heat supply on its crack surface are considered. The distributions of the displacement component and the stress component are analyzed using the fundamental equation system proposed in our previous paper, and the thermal stress intensity factor at a crack tip is evaluated theoretically. Numerical calculations are carried out for several cases taking into account the variety of nonhomogeneity of G, alpha, and lambda. Thereafter, the distributions of the displacements, stresses, and thermal stress intensity factor at the crack tip are shown graphically, and the influence of these nonhomogeneous material properties on the thermoelastic field and the thermal stress intensity factor is discussed.
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