An Investigation of the Thermomechanical Behavior of Fiber Reinforced Thermoset Composite Parts

纤维热机械行为的研究 将进行增强复合材料部件。 的目的 该项目将继续在建模，分析和处理方面进行研究 纤维增强复合材料热力学行为模拟 热固性部件。 这样的研究将增加对 收缩、翘曲和表面变形背后的现象和物理学 增强塑料零件的波纹度。 该项目将分为 分为两部分：实验和计算机建模 部分。 研究的实验方面涉及 热机械材料性能表征。 这里 固化程度对弹性常数和 将研究固化期间的收缩。 在第二 部分项目的收缩由于固化将被引入 并建立材料张量的本构模型 并在现有的有限元计算机模拟中实现 在成型过程中发生的热机械过程 薄和厚的纤维增强热固性部件。 仿真 考虑在真实环境下成型的复杂几何形状的零件 工业加工条件。 了解塑料的热机械行为， 能够预测填充模式，纤维取向， 固化过程中的温度场、残余应力、空隙和 裂纹、收缩、翘曲和表面波纹 实际制造的零件质量更高， 早期完成的一些昂贵和耗时的任务 零件和模具设计阶段。

An investigation of the thermomechanical behavior of fiber reinforced composite parts will be conducted. The objective of the project is to continue research in modeling, analysis and process simulation of the thermomechanical behavior of fiber reinforced thermoset parts. Such a study will increase the understanding of the phenomena and the physics behind shrinkage, warpage and surface waviness of reinforced plastic parts. The project will be divided into two portions: and experimental and a computer modeling portion. The experimental aspect of the research deals with thermomechanical material properties characterization. Here, the effect that degree of cure has on the elastic constants and on shrinkage during solidification will be studied. In the second portion of the project the shrinkage due to cure will be introduced and a constitutive model for the material tensor will be developed and implemented into existing finite element computer simulations of the thermomechanical processes that take place during molding of thin and thick fiber reinforced thermoset parts. The simulation considers parts of complex geometry molded under realistic industrial processing conditions. Understanding the thermomechanical behavior of plastics and being able to predict filling patterns, fiber orientation, temperature fields during cure, residual stresses, voids and cracks, shrinkage, warpage and surface waviness before a part is actually manufactured leads to higher part quality and eliminates some of the expensive and time consuming tasks done in the early stages of part and mold design.