A parametric numerical analysis of stress intensity factors on multiple interacting surface cracks in T-butt joints using FRANCE3D
Under the action of repeated loading,fatigue cracks often initiated in stress concentration areas of aging ship structures.Multiple surface cracks are among the most typical cracks in the vicinity of weld toe of T-butts. It is well known that the existence of multiple cracks may lead to the failure of structures more easily than a single crack. Therefore,the interaction between multiple surface cracks should be taken into account rationally as a basis of fatigue life analysis. In this paper,a parametric analysis of stress intensity factor of a lead crack with disturbing crack in the vicinity of its crack tips is conducted taking the disturbing crack shape and position as the influential parameters. The boundary element analyses are performed to calculate the SIFs at each position along the crack front using FRANC3D. And the disturbing factor in terms of the SIF increment was accordingly discussed and quantified by comparing the SIFs with respect to the existence of disturbing cracks.
Stress intensity factor Multiple interacting surface cracks Fatigue life Disturbing factor Boundary element analyses
Sung-Won Kang Myung-Hyun Kim Wen-De Song Kyu-Seon Jeong
Department of Naval Architecture and Ocean Engineering,Pusan National University,Korea
国际会议
Fracture Mechanics and Applications 2008(国际断裂力学2008年年会)(FM2008)
杭州
英文
123-128
2008-10-31（万方平台首次上网日期，不代表论文的发表时间）