机织复合材料变曲率薄壳件固化特性分析
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作者单位:

1.天津工业大学机械工程学院,天津 300387;2.天津市现代机电装备技术重点实验室,天津 300387

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中图分类号:

TB332

基金项目:

天津市自然科学基金重点项目(23JCZDJC00450)


Analysis of Curing Characteristics of Thin Shell Woven Composites With Variable Curvature
Author:
Affiliation:

1.School of Mechanical Engineering, Tiangong University, Tianjin 300387;2.Advanced Mechatronics Equipment Technology Tianjin Area Major Laboratory,Tianjin 300387

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    机织复合材料结构件在固化过程中会经历复杂的物理和化学变化,在固化成型脱模后产生变形,严重影响构件的成型精度。为了准确预测变形,本文首先建立了机织复合材料结构件固化变形的多尺度模型,后结合细观力学方法获得机织复合材料在固化过程中力学性能与热性能的演化。然后以变曲率薄壳件及含曲率的层合板构件作为研究对象,采用顺序热-力耦合的模拟方法,进一步分析了曲率、厚度参数对机织复合材料结构件固化特性的影响。结果表明,厚度较薄的机织复合材料结构件,固化温度梯度较低,固化程度比较均匀;曲率参数会对曲面机织件的固化变形产生一定的影响,且构件厚度越薄,曲率对变形的影响越显著;在变曲率薄壳件固化完成脱模后,同一曲率处,薄壳件经纬纱方向的最大位移大于厚度方向的最大位移。

    Abstract:

    Composite structures made of woven composites undergo both physical and chemical changes during the curing process, and will produce deformation after demolding, which significantly impacts the accuracy of the parts. In order to accurately predict the deformation, this paper first establishes a multiscale analysis model for the curing deformation of woven composites parts, and combines the meso-mechanical method to obtain the evolution of mechanical and thermal properties of woven composites during the curing process. Then, the effects of curvature and thickness parameters on the curing characteristics of woven composite parts were further analyzed using the sequential thermo-mechanical coupling analysis method to simulate the thin shell parts of variable curvature and laminates with different curvature.The results showed that woven composite parts with a lower thickness have a lower temperature gradient during curing and a more uniform curing degree. The curvature parameters influence on the curing deformation of woven parts, and the thinner the member thickness, the more significant the effect of curvature on deformation. After the thin shell parts of variable curvature was cured and demolded, the maximum displacement in the warp and weft directions is greater than that in the thickness direction at the same curvature.

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引用本文

姚文标,牛雪娟.机织复合材料变曲率薄壳件固化特性分析[J].宇航材料工艺,2024,54(6):71-77.

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  • 收稿日期:2022-09-03
  • 最后修改日期:2022-11-12
  • 录用日期:2022-12-26
  • 在线发布日期: 2025-01-13
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