纤维铺层顺序对VARI工艺制备的泡沫填充GFRP矩形管轴向压溃性能影响的实验和数值模拟

EXPERIMENTAL AND NUMERICAL ANALYSIS OF THE EFFECT OF STACKING SEQUENCE ON AXIAL CRUSH PERFORMANCE OF FOAM-FILLED GFRP RECTANGULAR TUBES MANUFACTURED USING VARI PROCESS

层合板的铺层顺序是影响其在压溃过程中能量吸收性质的重要因素。然而,正确研究铺层顺序的影响,还需结合其他设计参数,比如制造工艺。迄今为止,针对铺层顺序对泡沫填充GFRP管轴向压溃性能的影响已进行了大量研究,但大多采用拉挤、缠绕或手糊工艺。用实验和数值模拟的方法研究了铺层顺序对真空辅助树脂灌注(VARI)工艺制造的泡沫填充GFRP矩形管轴向压溃性能的影响,并从中得出了最优纤维铺层顺序,可获得最佳吸能效果。

Known as a critical design parameter for energy absorbers,the laminate stacking sequence can affect the overall property of laminated composite structures during crush.However,a proper investigation of the effect of stacking sequence still needs to be addressed given the influence of other design parameters such as the manufacturing process.Many analyses have been done so far to understand this effect on axial crush performance of foam-filled GFRP tubes,but most of the tubes used were manufactured using pultrusion,winding or hand layup processes.In this paper,we investigate the effect of stacking sequences on a recently developed kind of foam-filled GFRP tubes manufactured using vacuum assisted resin infusion(VARI)process.Under axial crush loading,we experimentally and numerically investigate the foam-filled GFRP rectangular tubes.The fiber stacking sequence which can achieve the best energy absorption performance were obtained.