重频激光-载荷联合作用下碳纤维/环氧树脂复合材料失效规律  

ABLATIVE MECHANISM OF CARBON-FIBER/EPOXY COMPOSITES UNDER MECHANICAL LOADING AND IRRADIATING BY REPETITION FREQUECY LASER

作　　者：陈博[1,2] 万红[1] 穆景阳[1] 白书欣[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073 [2]防化研究院,北京102205

出　　处：《玻璃钢／复合材料》2011年第6期20-23,共4页Fiber Reinforced Plastics/Composites

摘　　要：主要研究了激光-载荷联合作用下,不同加载条件与不同辐照条件对碳纤维/环氧树脂复合材料失效规律的影响,实验结果表明,恒定激光辐照条件下施加拉伸载荷,复合材料失效速率随施加载荷的增大而显著提高;与激光辐照后常温测试力学性能相比,热力耦合作用下复合材料力学性能损失率增大;辐照激光平均功率密度与激光辐照下复合材料损伤形式是热力耦合作用下试样失效速率和失效模式的主要影响因素。The paper studies the ablative mechanisms of carbon-fiber/epoxy composites under combined mechanical loading and heating by repetition frequency laser, especially studies the effects of different laser irradiation parameters and loading weights. When laser irradiation parameters holds constant, invalidation time of composites will be shorten while loading weight increasing. And when loading weight keeps steady, invalidation times mainly influenced by laser average power density and the damage form of the composites. As laser average power density going up, the ablative velocities and the mechanical degradation rates of composites increase. Ablative holes brought by the vaporization of carbon fiber will expedite the development and growth of cracks

关 键 词：碳纤维/环氧树脂复合材料 重复频率激光 力学载荷 失效 

分 类 号：TB332[一般工业技术—材料科学与工程]