International Journal of Pressure Vessels and Piping,Volume 83,Issue 3,March 2006,Pages 188-196

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Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure
 Tạp chí International Journal of Pressure Vessels and Piping 2006 March; 83 (3):188-196
 Tác giả   M. Staat and Duc Khoi Vu
 Nơi thực hiện   Aachen University of Applied Sciences, Campus Jülich, Ginsterweg 1, 52428 Jülich, Germany
 Từ khóa   Limit analysis; Limit load; Global collapse; Circumferentially cracked pipe
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English[sửa]

Abstract

Published limit load formulae for circumferential defects overestimate the burst pressure for penetrating defects in pipes by the factor two in the short crack limit, because they only consider axial stress. Therefore, a class of limit load solution is discussed which takes the triaxial state of stress into account. The solutions for pressure loaded crack faces are improved analytically. Primal–dual limit analysis with the finite element method is used to adjust all solutions to numerical results. Limit loads are obtained for circumferential cracks of all sizes in thick-walled cylinders.

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