Finite element numerical simulation on longitudinal and transverse surface crack

doi:10.16411/j.cnki.issn1006-7736.2015.01.010

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Journal of Dalian Maritime University ›› 2015, Vol. 41 ›› Issue (1) : 49-53. DOI: 10.16411/j.cnki.issn1006-7736.2015.01.010

HUANG Ru-xu*, HUANG Jin-hao, WAN Zheng-quan

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Abstract

Behavior of the butt welded joint and plate surface crack propagation under tension load is studied by using finite element analysis and two coupled Paris fatigue growth laws in consideration of the retardation of the crack growth on surface layer. Results show that the butt welded joint longitudinal surface crack shapes change quickly into extremely shallowlong crack at the initial propagation phase and finally into shallowlong crack, while the plate surface crack shape and the butt welded joint transverse crack shapes change quickly into extremely near semicircular crack and finally into near semicircular crack. The butt welded joint longitudinal surface crack propagation rates are faster than those of plate surface crack and butt welded joint transverse crack.

Key words

welding structure / longitudinal surface crack / transverse surface crack / crack propagation / butt welded joint / finite element

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HUANG Ru-xu*, HUANG Jin-hao, WAN Zheng-quan. Finite element numerical simulation on longitudinal and transverse surface crack[J]. Journal of Dalian Maritime University. 2015, 41(1): 49-53 https://doi.org/10.16411/j.cnki.issn1006-7736.2015.01.010

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