孔边残余应变与疲劳循环次数相关性实验  

Experiment on correlation of residual strain around the hole and fatigue life cycle

作　　者：朱金花[1] 潘华烨[1] 何世平[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,安徽合肥230027

出　　处：《中国科学技术大学学报》2006年第4期388-390,共3页JUSTC

基　　金：国家自然科学基金(10232030)资助

摘　　要：对有限宽中心带孔拉伸试样进行疲劳试验.在疲劳加载过程中,按一定的疲劳周次在零载荷状态下停机,并采集试件表面上预先制备的白光散斑图.再应用数字散斑相关技术测量了不同疲劳循环次数后孔周的残余变形场,并给出了孔边最大残余应变与疲劳循环次数的关系曲线.Fatigue tests were carried out on the limited width specimen with center-hole. During the experiment, the fatigue-loading was paused after fixed fatigue cycle and the white-light speckle patterns were acquired without loading. The residual deformation around the hole was measured by digital speckle correlation technique and the relation curves of residual strain at the side of hole vs fatigue life cycles were obtained.

关 键 词：数字散斑相关技术 白光散斑 疲劳实验 残余应变 

分 类 号：O346.22[理学—固体力学]