碳纤维增强树脂基层板应变率相关损伤数值研究

发布时间：2018-09-09 17:48

【摘要】：为了研究高应变率载荷对于碳纤维增强树脂基复合材料变形破坏行为的影响,通过应变率修正式对复合材料的刚度与强度进行修正,建立了可考虑应变率效应的复合材料损伤数值模型,采用该模型对不同应变率条件下层板结构的面内破坏行为进行了模拟并与文献实验进行了对比分析。计算结果表明:本文所构建的数值模型可以有效预测树脂基层板结构在不同应变率条件下的破坏特征,并在材料刚度与强度硬化现象的预测方面有着较高精度;对于0°、90°铺层主导的试件,由于其力学性能近似为线性,数值模型在强度预测方面获得了较高精度;而对于±45°铺层主导试件,其在不同应变率条件下表现出较强的非线性损伤特性,因此模型在其强度性能预测方面存在一定误差。
[Abstract]:In order to study the effect of high strain rate load on the deformation and failure behavior of carbon fiber reinforced resin matrix composites, the stiffness and strength of the composites were modified by strain rate modification. A numerical model of composite damage considering strain rate effect is established. The in-plane failure behavior of laminated structures under different strain rates is simulated and compared with the experimental results. The results show that the numerical model constructed in this paper can effectively predict the failure characteristics of the resin base plate structure under different strain rates, and has a high accuracy in predicting the stiffness and strength hardening phenomenon of the material. For the specimens with 0 掳or 90 掳overlay, the numerical model has obtained high precision in strength prediction because its mechanical properties are approximately linear, while for 卤45 掳laminated specimens, the numerical model has achieved a higher accuracy in predicting the strength of the specimens, but in the case of 卤45 掳laminated specimens, The model shows strong nonlinear damage characteristics under different strain rates, so there is a certain error in the prediction of its strength performance.
【作者单位】：西北工业大学航空学院;
【基金】：国家自然科学基金(11502205)~~
【分类号】：TB332

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