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Research on Pre-loaded Composite Irradiated by Laser Beam

机译：激光束预加载复合材料的研究

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This paper investigates failure behavior tests of T300/AG80 composite laminated specimens under tensile and compressive preload using a load holding device and laser irradiation from an Nd: YAG laser. By changing the magnitudes of the preload and the power densities of the laser, the effects of preload and laser power density on the time-to-failure of the specimens were observed. The response process of specimens was synchronized taken in using high-speed camera in experiment. The experimental results showed that tensile mechanical properties of T300/AG80 composite laminated specimens were obviously superior to ones in compression test. The relational expressions between the time-to-failure of specimens and pre-loads as well as with laser power densities were acquired through fitting experiment data. The time-to-failure reduced with the pre-load increasing, the relationship is approximating linear when the laser power density kept invariable. When the pre-load kept unchanged, the time-to-failure reduced as the laser power density increased. The relationship is approximating exponential. A basis for life prediction of structure mechanically loaded in either tension or compression during the irradiation by laser is provided by fitting expression.
机译：本文研究了使用负载保持装置和Nd：YAG激光照射的T300 / AG80复合层压板在拉伸和压缩预载荷下的失效行为测试。通过改变预紧力的大小和激光的功率密度，可以观察到预紧力和激光功率密度对试样破坏时间的影响。实验中使用高速相机同步采集标本的响应过程。实验结果表明，T300 / AG80复合材料层合板的拉伸力学性能明显优于压缩试验。通过拟合实验数据，获得了试样破坏时间与预紧力以及激光功率密度之间的关系式。随着预载荷的增加，失效时间减少，当激光功率密度保持不变时，该关系近似线性。当预载保持不变时，随着激光功率密度的增加，失效时间缩短。该关系是近似指数的。通过拟合表达式提供了在激光照射期间机械地承受拉力或压缩力的结构的寿命预测的基础。

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