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为预测含孔隙复合材料单层板的弹性常数,以单向纤维增强复合材料单层板为研究对象,首先,基于细观力学方法,提出了一种基于两尺度代表体元的含孔隙复合材料单层板弹性常数预测方法;然后,基于纤维排列和孔隙特征,建立了纤维-基体尺度的代表体元模型和含孔隙复合材料单层板的代表体元模型,并采用有限元方法求解弹性常数;接着,采用周期对称边界条件,在纤维-基体尺度先进行第1步等效,得到不含孔隙复合材料单层板的弹性常数;最后,在含孔隙复合材料单层板的代表体元模型上进行第2步等效,完成了含孔隙复合材料单层板弹性常数的预测。结果显示:应用该方法得到的计算结果与试验数据吻合较好;结合纤维、基体弹性常数及孔隙形态的模型,该方法可以反映各因素对复合材料单层板弹性常数的影响。
In order to predict the elastic constants of single-layer plates with porous composites, a unidirectional fiber-reinforced composite monolayer plate is taken as the research object. First, based on the meso-mechanics method, a porous composite material based on two- Then, based on the fiber arrangement and pore characteristics, the representative voxel model with fiber-matrix scale and the representative voxel model with porous composite monolayer are established, and the elastic constants Then, using the periodic symmetric boundary conditions, the first step equivalent is performed on the fiber-matrix scale to obtain the elastic constant of the non-porous composite single-layer plate; and finally, the representative voxel model On the second step equivalent to complete the elastic modulus of the porous composite sheet with a single layer prediction. The results show that the calculated results are in good agreement with the experimental data. Combining with the model of fiber, matrix elastic constant and pore morphology, this method can reflect the influence of various factors on the elastic constant of single layer plate.