激光辐照树脂基复合材料的一维温度场模拟

为了解决激光辐照树脂基复合材料时热解热和移动热解面给温度场求解带来的难题,通过修正处理相变问题的热焓法,建立了连续激光辐照树脂基复合材料的一维温度场模型,简化了求解过程。在此基础上采用“历史最高温度点追踪法”对热焓法模型进行了进一步修正,使之能够解决脉冲激光辐照复合材料时温度双向变化与热解过程不可逆之间的矛盾,从而对脉冲激光辐照的情况也能适用。用有限差分方法进行离散后,编写了FORTRAN程序求得数值解。计算结果与实验结果基本相符,最后模型分析了脉冲激光参量对树脂基复合材料温升的影响。

One-Dimensional Thermal Pattern Simulation of Resin Based Composites Subjected to Pulse Laser Beam

One-dimensional (1D) temperature field model is built to simulate the effects of resin based composites subjected to continuous laser beam. “Phase change enthalpy method” is put forward to deal with the problem of additional heat absorbed during resin decomposition and moving decomposition surface, which simplifies the solving process; then, the model is adjusted using “highest historical temperature pursue method” to revise the model of enthalpy method, which settles the argument between bidirectional change of temperature and irreversible decomposition process. Then, FORTRAN compute program is compiled after discreting the equtions with difference method. Results from calculation and references agree well. Using the model, the relationship between laser parameters and composites temperature is studed at last.