TORSIONAL IMPACT RESPONSE OF A PENNY-SHAPED CRACK IN A FUNCTIONAL GRADED STRIP

被引：0

作者：

冯文杰

李向国

王守东

机构：

[1] Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute, Shijiazhuang 050043, P.R.China

[2] ,Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute, Shijiazhuang 050043, P.R.China

[3] ,Department of Resource and Information, University of Petroleum, Beijing 102200, P.R.China

来源：

Applied Mathematics and Mechanics(English Edition) | 2004年 / 12期

关键词：

dynamic stress intensity factor; torsional impact; penny-shaped crack; functionally graded strip; integral transform; energy density factor;

D O I：

暂无

中图分类号：

O346.1 [断裂理论];

学科分类号：

080102 ;

摘要：

The torsional impact response of a penny-shaped crack in a nonhomogeneous strip is considered. The shear modulus is assumed to be functionally graded such that the mathematics is tractable. Laplace and Hankel transforms were used to reduce the problem to solving a Fredholm integral equation. The crack tip stress field is obtained by considering the asymptotic behavior of Bessel function. Explicit expressions of both the dynamic stress intensity factor and the energy density factor were derived.And it is shown that, as crack driving force, they are equivalent for the present crack problem. Investigated are the effects of material nonhomogeneity and (strip’s) highness on the dynamic fracture behavior. Numerical results reveal that the peak of the dynamic stress intensity factor can be suppressed by increasing the nonhomogeneity parameter of the shear modulus, and that the dynamic behavior varies little with the adjusting of the strip’s highness.

引用

页码：1398 / 1404

页数：7

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