General laws of multiple fracture at static,cyclic and dynamic loading
Multiple fracture patterns of specimens from low-and medium carbon steel tested in conditions of static,dynamic and cyclic loading were studied.Cumulative distributions of microcracks by length under static and cyclic loading,distributions of the number of fragments by their mass under dynamic loading and amplitude distributions of acoustic emission signals were plotted.The parameters of these distributions at different stages of loading were estimated.It was studied the influence of specimen thickness,the distance to the fracture surface,the grain size and the failure mechanism on these parameters.The general laws characterizing multiple fractures at different loading conditions were found.They include,in particular,a change in function describing the distributions and a reduction of the exponents of these functions before fracture.The physical meaning of the estimated distribution parameters,the possibility of their use for the fracture prediction and material selection are discussed.
Multiple fracture Damage evolution General fracture laws
Luidmila R.Botvina
Department of SSA,A.A.Baikov Institute of Metallurgy and Materials Science,Russian Academy of Sciences,119991
国际会议
北京
英文
1-7
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）