玻璃纤维/树脂复合材料泡沫夹层板弯曲能量耗散机制

Bending energy dissipation mechanism of glass fiber/resin composite foam sandwich panel

[目的]为了解玻璃纤维/树脂复合材料夹层板在弯曲载荷作用下的能量耗散机制,从能量耗散角度开展数值模拟分析和试验研究。[方法]基于有限元软件ABAQUS建立玻璃纤维/树脂复合材料泡沫夹层板的有限元分析模型,对三点弯曲试验中典型的破坏模式和能量耗散机制进行模拟分析,将数值模拟结果与试验结果进行对比。在数值模型有效性分析的基础上,进一步分析面板和夹芯层厚度对玻璃纤维/树脂复合材料泡沫夹层板力学承载性能和能量耗散机制的影响。[结果]结果表明,增加表层复合材料面板厚度能够更大程度地提高玻璃纤维/树脂复合材料泡沫夹层板的比吸能效率。[结论]研究成果可为玻璃纤维/树脂复合材料泡沫夹层结构的工程防护应用设计提供参考,具有一定的理论意义和工程应用价值。

[Objectives]In order to understand the energy absorption mechanism of glass fiber/resin composite foam sandwich panels under bending load,the numerical simulation analysis and experimental study were carried out from the angle of energy dissipation.[Methods]The finite element analysis model for glass fiber/resin composite foam sandwich panels was established based on finite element software ABAQUS to simulate and analyze the typical failure mode and energy absorption mechanism under three-point bending and compare the numerical simulation results with test results.Furthermore,the influence of the thickness of the panel and the core on the bearing capacity and energy absorption capacity was further analyzed based on the analysis of the validity of the numerical model.[Results]The results show that an increased thickness of composite face sheet can provide higher energy absorption mechanism of glass fiber/resin composite foam sandwich panels.[Conclusions]The study in this paper can provide reference for the engineering protection application design of glass fiber/resin composite foam sandwich structure,which has certain theoretical significance and engineering application value.