Comparison of Tensile and Compressive Characteristics of Intra/Interply Hybrid Laminates Reinforced High-Density Flexible Foam Composites

摘要

The current study focused on fabrication and mechanical evaluation of intra/interply hybrid laminates-reinforced high-density flexible foam composites. The effects of composite thickness and expansion factor on the tensile and compressive characterization of the hybrid-laminated composites were experimentally investigated. Double face sheets were made of high-strength intra/interply hybrid laminates containing recycled Kevlar nonwovens and glass woven fabric. The results revealed that the hybrid laminates face sheet apparently promoted the tensile strength and tear resistance of the high-density flexible polyurethane foam. Tearing resistance in perpendicular direction exceeded more than twice the value in parallel direction. In terms of dynamic cushioning properties, cushioning force increased with the increase in composite thickness and the decrease in expansion factor, whereas the cushioning capacity loss, however, showed a different trend with the variation of the parameters. Most samples buffered more than 95% incident force under dynamic loading. Composite thickness and expansion factor exhibited significant influence on compression and indentation properties, including hardness, initial hardness factor, and indentation modulus. Except the composites with 10 mm thickness, the intra/interply hybrid laminated composites exhibited hysteresis loss of indentation force deflection ranging from approximately 30 to 38%, which was due to the fiber and thermal bonding point failure of hybrid laminates as unrecoverable damage. (C) 2014 Wiley Periodicals, Inc.