The Calculation of dynamic fracture parameters of metal material under impact loading
Dynamic fracture mechanics,which doesnt neglect the inertia effect of the subject investigated,is widely used in analysis of effectiveness of engineering structure and equipment,etc.But the research of dynamic fracture is much more complicated than quasi-static fracture problem while considering inertia effect and stress wave effect,as a result of which,even the analytical result of stress intensity factor at the crack tip of such simple sample as three-point bending beam hasnt been determined by far.To satisfy the request of theoretic and experimental analysis,this paper describes a numerical method to compute dynamic fracture parameters of three-point bending sample impacted by Hopkinson Pressure Bar based on Virtual Crack Closure Technique (VCCT),in which the dispersion and inertia effect are accounted in the input loading.Using the dynamic fracture experimental data in literature related,corresponding dynamic fracture toughness is gained through the method presented in this paper.The calculated results are in satisfactory agreement with the results in literature related.
Three-point bending sample Hopkinson pressure bar Dynamic stress intensity factor Finite element Virtual crack closure technique
H.Y.Chen X.G Zeng Q.Y.Wang J.L.Li S.S.Xu
College of Architecture and Environment,Sichuan University,Chengdu 610065,China
国际会议
成都
英文
165-169
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）