Fatigue growth behavior for surface crack in welding joints under combined compressive and bending stresses》.pdf

International Journal of Fatigue 77 (2015) 50–63 Contents lists available at ScienceDirect International Journal of Fatigue journal homepage: /locate/ijfatigue Fatigue growth behavior for surface crack in welding joints under combined compressive and bending stresses Wei Shen a,⇑, Renjun Yan a, Enqian Liu b, Lin Xu a a Key Laboratory of High Performance Ship Technology of Ministry of Education, Wuhan University of Technology, Wuhan 430063, China b Department of Naval Architecture and Marine Engineering, University of Strathclyde, Glasgow G40LZ, United Kingdom a r t i c l e i n f o a b s t r a c t Article history: It has been demonstrated by experiments that crack can grow under cyclic compressive loading. Received 26 August 2014 However, it is difficult to observe and describe accurately by mathematical methods. In addition, cracks Received in revised form 5 March 2015 may close under compressive loading, which also increases the complexity of the problem. The fatigue Accepted 8 March 2015 growth behavior for surface cracks under biaxial loadings was studied by fatigue tests of HTS-A steel. Available online 16 March 2015 According to experimental evidences, it is concluded that the transverse compressive stress not only changes the fracture morphology but also affect crack propagation life. Considering the influence of Keywords: the compre