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.
基金
国家自然科学基金(10232030)资助
关键词
数字散斑相关技术
白光散斑
疲劳实验
残余应变
digital speckle correlation technique
white-light speckle
fatigue experiment
residual strain
