Fatigue growth behavior for surface crack in welding joints under combined compressive and bending stresses
作者： Wei Shen , Renjun Yan , Enqian Liu , Lin Xu
DOI: 10.1016/J.IJFATIGUE.2015.03.005
关键词: Materials science 、 Composite material 、 Butt joint 、 Transverse plane 、 Crack closure 、 Compressive strength 、 Fracture (geology) 、 Bending (metalworking) 、 Welding 、 Structural engineering 、 Fracture mechanics
摘要: Abstract It has been demonstrated by experiments that crack can grow under cyclic compressive loading. However, it is difficult to observe and describe accurately mathematical methods. In addition, cracks may close loading, which also increases the complexity of problem. The fatigue growth behavior for surface biaxial loadings was studied tests HTS-A steel. According experimental evidences, concluded transverse stress not only changes fracture morphology but affect propagation life. Considering influence stress, this paper proposed an equivalent SIF model subjected bending stresses on basis McEvily formula. Finally, comparisons are made between prediction results data.
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