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The evaluation of T-stress using bou...

Li, Jian.

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The evaluation of T-stress using boundary element method.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The evaluation of T-stress using boundary element method./
作者:	Li, Jian.
面頁冊數:	119 p.
附註:	Source: Masters Abstracts International, Volume: 42-06, page: 2322.
Contained By:	Masters Abstracts International42-06.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ89849
ISBN:	0612898490

The evaluation of T-stress using boundary element method.
Li, Jian.

The evaluation of T-stress using boundary element method. - 119 p.

Source: Masters Abstracts International, Volume: 42-06, page: 2322.

Thesis (M.A.Sc.)--Carleton University (Canada), 2004.

A two-dimensional numerical study employing the boundary element method (BEM) of elastic T-stress for test specimens and thick-walled cylinders is presented in this thesis. The T-stress, together with the stress intensity factor K, provide a more reliable two-parameter prediction of fracture in linear elastic fracture mechanics. In this study, both the direct displacement approach and a contour integral approach, in conjunction with BEM analysis, have been developed to obtain the T-stress. A wide range of relative crack-tip element sizes, crack length ratios and different loading conditions are considered. The technique is first validated with analytical and finite element solutions in the literature for an infinite plate and three test specimens. Some general guidelines for proper mesh design are developed. The pressured thick-walled cylinder problem is one of much practical importance in industry. When cracked in the radial direction, it is normally considered to be as a 'low-constraint' geometry. T-stress solutions for this problem under internal pressure and crack face loading conditions are obtained. Different radius ratios and relative crack lengths are considered. Using the BEM results as reference T-stress solutions, the T-stress weight functions for thick-walled cylinder have also been derived. Results of the study show that the two-dimensional BEM analysis, together with weight function method, can be used to provide a quick and accurate estimate of T-stress for 2-D crack problems.

ISBN: 0612898490Subjects--Topical Terms:

783786
Engineering, Mechanical.

The evaluation of T-stress using boundary element method.
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245 1 4 $a The evaluation of T-stress using boundary element method.
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500 $a Source: Masters Abstracts International, Volume: 42-06, page: 2322.
500 $a Advisers: X. Wang; C. L. Tan.
502 $a Thesis (M.A.Sc.)--Carleton University (Canada), 2004.
520 $a A two-dimensional numerical study employing the boundary element method (BEM) of elastic T-stress for test specimens and thick-walled cylinders is presented in this thesis. The T-stress, together with the stress intensity factor K, provide a more reliable two-parameter prediction of fracture in linear elastic fracture mechanics. In this study, both the direct displacement approach and a contour integral approach, in conjunction with BEM analysis, have been developed to obtain the T-stress. A wide range of relative crack-tip element sizes, crack length ratios and different loading conditions are considered. The technique is first validated with analytical and finite element solutions in the literature for an infinite plate and three test specimens. Some general guidelines for proper mesh design are developed. The pressured thick-walled cylinder problem is one of much practical importance in industry. When cracked in the radial direction, it is normally considered to be as a 'low-constraint' geometry. T-stress solutions for this problem under internal pressure and crack face loading conditions are obtained. Different radius ratios and relative crack lengths are considered. Using the BEM results as reference T-stress solutions, the T-stress weight functions for thick-walled cylinder have also been derived. Results of the study show that the two-dimensional BEM analysis, together with weight function method, can be used to provide a quick and accurate estimate of T-stress for 2-D crack problems.
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