应变测量数据在全尺寸飞机结构疲劳试验裂纹检测中的应用

摘要

通过对全尺寸飞机疲劳试验中同一载荷状态下多次重复测量应变数据的统计分析,根据其变化规律和贴片位置,预估飞机结构可能产生裂纹的区域,并利用无损检测确定裂纹的具体位置和长度,为全尺寸飞机疲劳试验探索一种新的裂纹检测方法.%A new crack inspection method for full-scale aircraft fatigue experiment was proposed. With this method, structure crack areas were predicted by statistical analysis of repetitive metrical strain values under the same load condition in full-scale aircraft fatigue experiment, and by strain gauge locations. Scatheless inspection technique was employed to obtain crack locations and crack length.