南京航空航天大学k8凯发集团主页平台管理系统 郭万林-k8凯发集团

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所属单位：航空学院

发表刊物：engineering fracture mechanics

关键字：elastic-plastic crack border fields out-of-plane constraint factor t-z in-plane constraint coefficient a(t) higher order j-t-z-a(t) solution j-t-z solution

摘要：higher order j-a(2) solution has been developed to improve the hrr singular solution under ideal plane strain conditions in power-law hardening solids with the the second a(2) being considered to take into account of the in-plane constraint effect, and the j-t-z singular solution has been obtained for three-dimensional (3d) cracked body by introducing the out-of-plane stress constraint factor t-z. here a higher order j-t-z-a(t) solution is developed on the basis of the j-t-z and j-a(2) solutions and validated against comprehensive 3d finite element (fe) analyses for specimens with through-thickness, surface, embedded and corner cracks. it is shown that better agreements are obtained between the higher order j-t-z-a(t) solution and 3d fe results in all simulated conditions than previously available two- or three-parameter solutions. for specimens of high in-plane constraint, such as the single-edge cracked tension specimen, compact specimen and single-edge-notched bending specimen under three-point bending, the j-t-z leading singular solution itself shows sufficient accuracy. this universal characterization of crack border stress fields confirms that the developed j-t-z-a(t) solution combines the advantages of the j-t-z and j-a(2) solutions, which can service as a solid foundation of elastic-plastic fracture mechanics.

issn号：0013-7944

是否译文：否

发表时间：2019-12-01

合写作者：cui, pengfei

通讯作者：郭万林