不同实验室试样间拘束度的匹配性研究  

STUDY ON THE MATCHING OF CRACK-TIP CONSTRAINTS AMONG DIFFERENT LABORATORY SPECIMENS

作　　者：杨杰 刘玉嫚 吴凡 YANG Jie;LIU YuMan;WU Fan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;China National Heavy Duty Truck Group Co.,Ltd.,Research&Development Center,Jinan 250101,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]中国重型汽车集团有限公司技术发展中心,济南250101

出　　处：《机械强度》2019年第6期1308-1314,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51605292)资助~~

摘　　要：裂尖拘束度的匹配是目前结构完整性评定中所面临的难题。由于拘束参数的限制,不同实验室试样间、实验室试样与实际结构间拘束度的匹配还没有建立。基于统一拘束参数Ap,以常用实验室SENB,CT,SENT和CCT试样为研究对象,对不同拘束状态下各试样的裂尖拘束进行研究,构建了不同试样的J/Jref-槡A p关联线,建立了不同试样间拘束度的匹配。本研究将为构建纳入拘束的准确的结构完整性评定技术和方法提供科学支持。The matching of crack tip constraints is a difficult problem in the current structure integrity assessment method.Due to the restriction of current constraint parameters,the matching of crack tip constraints between different laboratory specimens,between laboratory specimens and actual structures have not been established.In this paper,based on the unified constraint parameter Ap,the constraints of different SENB,CT,SENT and CCT specimens were studied,the J/Jref-(Ap)1/2 correlation lines and the matching of crack tip constraints between different laboratory specimens were established.This study will provide scientific support for building an accurate structure integrity assessment method which considers constraint.

关 键 词：拘束 匹配 实验室试样 结构完整性评定 

分 类 号：TH114[机械工程—机械设计及理论] O346[理学—固体力学]