复合管撞击吸能特性的数值研究

针对大变形、大应变的复合材料受撞击吸能的复杂的过程，进行了数值分析，综合了复合材料的各种失效准则，运用非线性有限元理论建立了数值分析模型．研究了外部缠有增强环氧玻璃纤维的金属圆柱管(简称为复合管)在轴向撞击载荷下的能量吸收特性，并从金属材料的性能、复合材料层的厚度和纤维的铺设角度这几个方面研究了复合管的吸能性能的影响因素，数值模拟结果与实验结果吻合，为复合材料吸能元件的设计和研究提供了有价值的参考．

Numerical study on the impact absorption behavior of compound tubes

Numerical model simulates the large deformation and stain process of composite material. The numerical model is proposed with several failure criteria of composite material and non-linearity finite element theory. Axial crushing energy dissipation behavior of compound tubes (metal tube winded by glass/epoxy) is simulated and investigated. Factors that affect the energy absorption capability of compound tubes are studied from the views of metal property, composite thickness and winding angle. The calculating results correspond to the experimental results, which assure the validity of this numerical model. This result can give a valuable reference to design of the impact absorption energy component.