基于锁相红外热成像技术对铝合金铆接结构件疲劳极限的快速测定  

RAPID DETERMINATION OF THE FATIGUE LIMIT OF ALUMINUM ALLOY RIVETED COMPONENT BASED ON LOCK-IN INFRARED THERMOGRAPHY TECHNIQUE

作　　者：李萌[1] 李旭东[2] 张辉[2] 吴东流[2] 刘勋[3] 刘俊岩[3] 

机构地区：[1]长春大学机械工程学院,长春130022 [2]中国航空综合技术研究所,北京100028 [3]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《工程力学》2012年第12期28-33,共6页Engineering Mechanics

基　　金：国防科技工业技术基础科研项目(Z052009T002)

摘　　要：该文将锁相红外热成像技术应用到2A12铝合金材料制成的铆接结构试件疲劳极限的快速测定上,将锁相红外热成像技术获得的结果与现有的该种材料在不同应力集中系数和应力比下疲劳极限试验数据进行插值得到的结果进行了对比,并与通过传统的阶梯法获得的试验结果进行了对比,验证了对于过盈量不大的普通铆接结构件来说,可以将锁相红外热成像技术应用到疲劳危险点处于多轴应力状态的金属铆接结构试件疲劳极限的快速测定上。The lock-in infrared thermography technique was proposed to determine the fatigue limit of 2A12 aluminum alloy riveted component rapidly. The results obtained by this technique were compared not only with those obtained by interpolating the existing fatigue limits of the same material under different stress concentration coefficients and different stress ratios, but also with the results obtained by the conventional staircase method. It was verified that for conventional riveted component of which the magnitude of interference was not too large, the lock-in infrared thermography technique can be applied to rapidly determine the fatigue limit of metal riveted structure with multiaxial stress at the fatigue dangerous position.

关 键 词：固体力学 快速测定 锁相 红外热成像 疲劳极限 金属铆接结构 

分 类 号：TG115.25[金属学及工艺—物理冶金]