| 热压工艺热-化学-应力三维数值模型及有限元分析 |
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| 引用本文： | 刘勇,吴颂平. 热压工艺热-化学-应力三维数值模型及有限元分析[J]. 复合材料学报, 2009, 26(1): 134-139 |
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| 作者姓名： | 刘勇 吴颂平 |
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| 作者单位： | 北京航空航天大学,航空科学与工程学院,国家计算流体力学实验室,北京,100083;北京航空航天大学,航空科学与工程学院,国家计算流体力学实验室,北京,100083 |
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| 摘 要： | 建立了复合材料热压工艺的三维热-化学-应力耦合数学模型。该模型考虑了整个工艺周期过程中的热-化学应变、材料的黏弹性效应、各向异性及玻璃化转变温度与固化度的关系。其中热-化学模型可采用完全耦合的形式求解，而应力模型则可采用单向耦合的形式求解。对AS4/3501-6层合平板的热压工艺过程用有限元方法进行了数值模拟，得到的层合板翘曲度与实验结果相符。计算结果表明，层合板厚度减小或长度增大，都会使翘曲变形增大，而工艺压强对翘曲变形影响很小。层合板的翘曲变形随着模具与层合板热膨胀系数差距的变小而减小。
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| 关 键 词： | 热压工艺 黏弹性效应 应力模型 有限元分析 翘曲度 |
| 收稿时间： | 2007-12-17 |
| 修稿时间： | 2008-03-03 |
Three-dimensional thermal-chemical-stress numerical model and finite element analysis for hot-pressing process |
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| LIU Yong,WU Songping. Three-dimensional thermal-chemical-stress numerical model and finite element analysis for hot-pressing process[J]. Acta Materiae Compositae Sinica, 2009, 26(1): 134-139 |
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| Authors: | LIU Yong WU Songping |
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| Affiliation: | National Laboratory for Computational Fluid Dynamics, School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | A three-dimensional thermal-chemical-stress coupling numerical model was developed for the hot-pressing process of composites.Thermo-chemical strain,viscoelastic behavior,anisotropy,glass transition temperature related to the cure were fully considered during the autoclave cycle.The model was numerically solved by FEM,fully coupled for thermal-chemical model and one way coupled for the stress model.The results of AS4/3501-6 composite laminate show good agreement in simulated curvature with experimental resu... |
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| Keywords: | hot-pressing process viscoelastic behavior stress model FEA curvature |
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