Selecting H-60 PVC foam, four-axis E-glass non-woven fabric and vinyl resin, a type of innovative reinforced sandwich composite as grooved perforation sandwich （GPS） were fabricated by VIMP. The interfacial structur...Selecting H-60 PVC foam, four-axis E-glass non-woven fabric and vinyl resin, a type of innovative reinforced sandwich composite as grooved perforation sandwich （GPS） were fabricated by VIMP. The interfacial structure between the face and core of the sandwich is innovative because of the acuminate grooves in both sides of foam core and the holes perforated along core’s height. The fabrication results show that VIMP is a high-speed and cost-effective manufacturing method. The mechanical properties of the reinforced foam core were tested. The typical flexural failure modes of sandwich specimens were observed. The flexural stiffness and ultimate bearing capacity of sandwich were studied by ordinary sandwich beam theory and finite element method.展开更多
复合材料液体成型技术是一种低成本、高效率的复合材料制造工艺。基于理查德方程和一种轮廓函数建立了一种预报VARTM(Vacuum Assisted Resin Transfer Molding)工艺充模过程中不饱和流动情况下的树脂流动前沿特性和压强场的方法。采用CO...复合材料液体成型技术是一种低成本、高效率的复合材料制造工艺。基于理查德方程和一种轮廓函数建立了一种预报VARTM(Vacuum Assisted Resin Transfer Molding)工艺充模过程中不饱和流动情况下的树脂流动前沿特性和压强场的方法。采用COMSOL Multiphysics软件进行有限元数值模拟,提出浸润比参数λ,将不同时刻的数值模拟结果与试验结果进行量化对比,良好的对比结果证明了该方法的可靠性。展开更多
基金Funded by the Special Prophase Project on Basic Research of The Na-tional Department of Scientific and Technology(No. 2008CB617613)the National Natural Science Foundation of China (No. 50978134)the Research Award Fund for Young Teachers of Nanjing University of Technology
文摘Selecting H-60 PVC foam, four-axis E-glass non-woven fabric and vinyl resin, a type of innovative reinforced sandwich composite as grooved perforation sandwich （GPS） were fabricated by VIMP. The interfacial structure between the face and core of the sandwich is innovative because of the acuminate grooves in both sides of foam core and the holes perforated along core’s height. The fabrication results show that VIMP is a high-speed and cost-effective manufacturing method. The mechanical properties of the reinforced foam core were tested. The typical flexural failure modes of sandwich specimens were observed. The flexural stiffness and ultimate bearing capacity of sandwich were studied by ordinary sandwich beam theory and finite element method.
