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作 者:王家伟 李斌[1] 张检民[2] 冯国斌[2] 刘卫平[2] 韦成华[2] 韩永超[2] 王娜 Wang Jiawei;Li Bin;Zhang Jianmin;Feng Guobin;Liu Weiping;Wei Chenghua;Han Yongchao;Wang Na(School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China;State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi'an 710024,China)
机构地区:[1]西北工业大学航空学院,陕西西安710072 [2]西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安710024
出 处:《红外与激光工程》2023年第1期108-115,共8页Infrared and Laser Engineering
基 金:激光与物质相互作用国家重点实验室基金(SKLLIM1802)。
摘 要:为了研究以激光为热源开展材料高温力学性能测试的可行性,建立理论模型与数值模型,分析了材料在双面均匀激光光斑加热下的表面及内部温升。结果表明,理想情况下采用均匀化激光双面辐照的加热方式可以在试件加热区域内形成较均匀的温度场。为验证上述结论,建立了光斑匀化度达92%的激光双面辐照热力耦合测试试验平台,并基于相关测试方法获取了传统加热方式难以快速加热的CFRP层合板高温拉伸强度。结果表明,试件在激光加热中心测试区域(10 mm×10 mm)内的温度均匀性良好。试件在均匀化激光双面辐照下可被快速加热至923℃,测试区域内的最大温度波动为6.8%。文中提出的基于均匀化激光双面辐照的热力耦合测试方法相比传统测试方法具有通用性好、温升率高、测试温度高、测试效率高等一系列的优点。该研究可为进一步研制通用型材料/结构高温升率、高温力学性能试验系统提供关键技术支撑。In order to study the feasibility of testing the high temperature mechanical properties of materials with laser as heat source, a theoretical model and a numerical model were established to analyze the surface and internal temperature rise of materials heated by double-sided uniform laser spot. The results show that the uniform temperature field can be formed in the heating area of the specimen by using the double sided uniform laser irradiation under the ideal condition. In order to verify the above conclusions, a thermo-mechanical test platform of laser irradiation with spot uniformity of 92% is established, and the high temperature tensile strength of CFRP laminates which are difficult to be heated quickly using traditional method is obtained based on the relevant test methods. The results show that the temperature uniformity of the specimen in the test area of laser heating center(10 mm×10 mm) is good. The specimen can be rapidly heated to 923 ℃ under uniform double-sided laser irradiation, and the maximum temperature fluctuation in the test area is 6.8%. The thermo-mechanical test method based on uniform laser double-sided irradiation has many advantages such as good generality, high temperature rise rate, high test temperature and high test efficiency. It provides a key technical support for further development of a universal test system of material/structure with high temperature rise rate and high temperature mechanical properties.
分 类 号:TN249[电子电信—物理电子学]
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