复合材料层合板在激光辐照下的应变测试与分析
Strain test and analysis of composite laminated plate under laser irradiation
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摘要: 对T300/AG80碳纤维复合材料层合板在激光辐照下的应变变化情况进行了测试。利用动态应变仪对不同半径激光光斑照射下的试件正面和背面的0,45,90三个方向的应变进行记录，通过对消除温升影响后的试验数据进行分析得知：各处应变随测试点到光斑中心的距离增大而减小；0方向应变最小，90方向应变最大，光斑辐照层合板5 s时，90方向应变值至少是0方向应变值的1.5倍。采用有限元分析软件对试验过程进行模拟，光斑外各处热应力随其到光斑中心距离的增大而减小。将模拟中得到的应变与试验过程中的测试值对比，得到温升影响造成的最大相对误差为16.9%.Abstract: The change in strain of T300/AG80 carbon fiber composite laminated plates were tested under laser irradiation. The strain in three directions of 0,45 and 90 of the samples under laser beams with various radii were recorded by the dynamic strain testing apparatus. With the effects of temperature eliminated, the presented data show that, the strain decreases with the increase of the distance to the center of laser spot. After the laminates are irradiated for 5 seconds, the maximum strain is found in the direction of 90 and is at least 1.5 times larger than the minimum strain in the direction of 0. The thermal stress at every point decreases as the distance to the spot center increases. The experiment process was simulated with finite element analysis softwa
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Key words:
- composite material /
- laser beam irradiation /
- strain measurement /
- thermal strain /
- relative error
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