复合材料热胀系数影响因素分析

文摘为了分析复合材料热胀系数的影响因素,对复合材料热胀系数设计起到指导意义,通过理论分析方法对纤维树脂体系、铺层顺序、铺层角度偏差、纤维体积分数等复合材料热胀系数影响因素做了相应研究。结论表明:同种基体不同纤维,其热胀性能表现出较大的差异;不同基体对同一种纤维热胀系数有较大的影响;0°铺层在管的外层会有助于降低轴向热胀系数,同时也会对径向热胀系数的增大有一定贡献;铺层角在30°~60°时,由于角度偏差带来的热胀系数偏差较大。复合材料管件的轴向热胀系数与纤维体积分数之间呈现出高度的非线性与非单调性,径向的热胀系数呈现出单调的降低现象。

Analyses on Affecting Factors of Composite Thermal Expansion Property

Factors affecting the thermal expansion coefficient of composite is of guiding significance for the design of thermal expansion coefficient of composite. The influence factors of thermal expansion coefficient of composite, such as fiber resin system, layer order, layer angle deviation and fiber volume content, are studied and the conclusions are given in this paper. The thermal expansion performance of the same matrix varies greatly, and the different matrix has a great influence on the thermal expansion coefficient of the same fiber. The outer layer of the 0° layer will help to reduce the axial thermal expansion coefficient, and will also contribute to the increase of the radial thermal expansion coefficient; the layer angle is from 30° to 60°, The deviation of thermal expansion coefficient caused by angle deviation is large. The axial thermal expansion coefficient of the composite tube and the volume content of the fiber showes a high nonlinear and non monotone, and the radial thermal expansion coefficient showes a monotonous decrease.