Three-dimensional modeling and experimental validation of thermomechanical response of FRP composites exposed to one-sided heat flux
Three-dimensional modeling and experimental validation of thermomechanical response of FRP composites exposed to one-sided heat flux
复制标题
单侧热流下 FRP 复合材料热机械响应的三维建模和实验验证
DOI：
10.1016/j.matdes.2016.03.098
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发表时间：
2016-06
影响因子：
8.4
通讯作者：
Jun Liang
中科院分区：
文献类型：
--
作者：
Shengbo Shi;Linjie Li;Guodong Fang;Jun Liang
纤维增强聚合物复合材料在高温下的热传导、气体扩散过程和热机械变形通常与化学分解过程相耦合。建立了多孔弹性体温度-扩散-变形耦合问题的三维控制微分方程。利用该数学模型对二氧化硅/酚醛复合材料的热机械行为进行了预测。研究了单向辐射热流作用下二氧化硅/酚醛复合材料的温度、孔隙压力、位移和应力等值线随时间的变化规律。基于数字图像相关技术，进行了非接触式高温变形测量试验。温度分布由嵌入在不同深度的试样的热电偶测量，而全场的位移和应变提供了相关的两个数字图像的试样表面在未变形和变形状态，分别。在相同的边界和初始条件下，通过将预测的温度和位移与实验值进行比较，评估了所提出的模型的准确性。
The heat transfer, gas diffusion process and thermomechanical deformation are generally coupled and associated with the chemical decomposition for fiber reinforced polymer composites at elevated temperatures. The three-dimensional (3-D) governing differential equations for the coupled temperature-diffusion-deformation problem of porous elastomers were developed. The thermomechanical behavior of a silica/phenolic composite material was predicted using the mathematical model. The spatially dependent temperature and pore pressure, displacement, and stress contours of silica/phenolic composites exposed to one-sided radiant heat flux were investigated. Based on the digital image correlation technique, a non-contact high temperature deformation measurement test was conducted. The temperature profiles were measured by the thermocouples embedded in different depths of the specimen, while the full-field displacements and strains were provided by correlating the two digital images of the specimen surface in the un-deformed and deformed states, respectively. The accuracy of the proposed model was assessed by comparing the predicted temperatures and displacements with experimental values for the same boundary and initial conditions.
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