碳纤维复合材料导流罩轻量化设计技术研究

Study on Lightweight Design Technologies of Carbon Fiber Reinforced Plastic Deflectors

为满足商用车轻量化发展需求,从材料轻量化角度出发,将某款商用车驾驶室的玻璃钢顶导流罩替换为碳纤维环氧树脂基复合材料(CFRP)顶导流罩,实现了降重30%的目标,同时性能指标达成,甚至优于原玻璃钢顶导流罩;基于3D-Hashin复合材料失效准则和Cohesive分层失效准则,建立了CFRP基本力学性能仿真模型,并通过与试验结果进行对比,验证了模型的有效性与材料参数准确性;通过优化碳纤维复合材料层合板的铺层角度设计,建立顶导流罩有限元模型,将两种材料的约束模态和刚度进行对比分析,结果表明:与原玻璃钢顶导流罩相比,碳纤维复合材料(CFRP)顶导流罩在显著降重的基础上,约束模态和平均刚度均有所提升,且满足强度性能指标。

To meet the development needs of commercial vehicle light weight,from the perspective of materials light weight,the original glass fiber composite deflectors were replaced by Carbon Fiber Reinforced Plastics(CFRP)deflectors,It is achieved that the weight is reduced by 30%and the performance index is consistent,and even better.Based on the composite material failure criterion of 3D-Hashin and Cohesive layered failure criterion,a simulation model of basic mechanical properties of CFRP was established,and the effectiveness of the model was verified by comparing with experimental results.through the design of CFRP layer angle,finite element modeling was founded,the modal performance and stiffness of the 2 materials deflectors were compared and analyzed,the results show that the theoretical quality of carbon fiber reinforced plastics(CFRP)deflectors model is reduced,at the same time,compared with the original glass fiber composites deflectors,the modal performance and the average stiffness increase,and meet the fracture strength requirements.