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首页> 外文期刊>Journal of Applied Polymer Science >Prediction of residual stresses and distortion in carbon fiber-epoxy composite parts due to curing process using finite element analysis
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Prediction of residual stresses and distortion in carbon fiber-epoxy composite parts due to curing process using finite element analysis

机译：用有限元分析预测固化过程中碳纤维-环氧树脂复合材料零件的残余应力和变形

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摘要

To predict the final geometry of carbon fiber-epoxy composite parts, a methodology is introduced that takes into account cure kinetics, cure shrinkage, thermal strains, tool-part interface, and development of mechanical properties during cure. These parameters affect process-induced residual stresses and distortion in the parts. A module was developed for each mechanism and a fully 3D coupled thermomechanical finite element analysis was utilized. To validate the simulation results, a square composite panel was fabricated and its pattern of distortion was obtained. The simulated distortion pattern agreed well with the actual pattern obtained from the experiments. Parallel processing and optimization of the developed codes were used resulting in 94% reduction in the computational time. The proposed methodology proved to be accurate and time-efficient in predicting the final geometry of the parts.
机译：为了预测碳纤维-环氧树脂复合材料零件的最终几何形状，引入了一种方法，该方法考虑了固化动力学，固化收缩率，热应变，工具-部件界面以及固化过程中机械性能的发展。这些参数会影响工艺引起的残余应力和零件中的变形。为每种机制开发了一个模块，并使用了完全3D耦合的热机械有限元分析。为了验证仿真结果，制造了方形复合板，并获得了其变形模式。模拟的失真模式与从实验中获得的实际模式非常吻合。并行处理和优化了开发的代码，从而使计算时间减少了94％。实践证明，所提出的方法在预测零件的最终几何形状方面是准确且省时的。

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