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激光辐照下复合材料热响应的轴对称数值分析

Axisymmetric numerical study on thermal response of composites to laser irradiation

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摘要

为了模拟激光辐照下碳纤维增强复合材料的瞬态热响应,建立了轴对称计算模型。模型考虑了激光辐照过程中基体热分解、质量迁移、比热容和热导率等物理量的变化情况。采用有限元方法求解控制方程,边界条件包含了激光辐照、对流换热以及辐射换热。在此基础上编写了计算程序,预测了激光辐照下碳纤维增强复合材料的瞬态温度场和基体热分解状况。为了校核模型,开展了激光辐照碳纤维复合材料试验。计算结果与试验数据比较表明,模型预测的复合材料温度-时间曲线与试验结果较好吻合,在较低功率密度激光辐照下复合材料热响应以基体热分解为主,与试验烧蚀形貌观察结果一致。

Abstract

The investigation into the laser irradiation effects of composites is important to the development of laser application. An axisymmetric model was proposed to predict the thermal responses of carbon fiber resin composite(CFRC) to laser irradiation in time and space domain. The finite element method was used to solve the governing equation. In this model, the boundary conditions were considered, including laser heat flow, heat convection and heat radiation. The progressive change in thermo-physical properties including decomposition degree, mass transfer, specific heat capacity, and thermal conductivity was determined. A code was developed to predict the transient temperature and thermal decomposing area of composite’s matrix under laser irradiation, and the results were compared to experimental data. The computed temperatures of composites consist with the experimental measurements well. It was found that when laser intensity was low, the thermal response pattern of CFRC composite was matrix decomposing.

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中图分类号:TN246

DOI:10.11884/hplpb201426.091024

基金项目:国家自然科学基金委员会-中国工程物理研究院联合基金项目(11076029);中国工程物理研究院科学技术发展基金项目(2014B0401055)

收稿日期:2014-01-03

修改稿日期:2014-03-05

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作者单位    点击查看

张家雷:中国工程物理研究院 流体物理研究所, 四川 绵阳 621900中国工程物理研究院 高能激光科学与技术重点实验室, 四川 绵阳 621900
王伟平:中国工程物理研究院 流体物理研究所, 四川 绵阳 621900中国工程物理研究院 高能激光科学与技术重点实验室, 四川 绵阳 621900
刘仓理:中国工程物理研究院, 四川 绵阳 621900中国工程物理研究院 高能激光科学与技术重点实验室, 四川 绵阳 621900

联系人作者:张家雷(zhangjialei21@163.com)

备注:张家雷(1980-), 男,博士研究生,从事激光与物质相互作用研究。

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引用该论文

Zhang Jialei,Wang Weiping,Liu Cangli. Axisymmetric numerical study on thermal response of composites to laser irradiation[J]. High Power Laser and Particle Beams, 2014, 26(9): 091024

张家雷,王伟平,刘仓理. 激光辐照下复合材料热响应的轴对称数值分析[J]. 强激光与粒子束, 2014, 26(9): 091024

被引情况

【1】张家雷,谭福利,刘仓理,王伟平. 激光熔蚀金属平板的三维有限体积法数值分析. 强激光与粒子束, 2015, 27(8): 81002--1

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