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针对高性能超高分子量聚乙烯(UHMWPE)纤维的特性,成功编织出纬平针、罗纹、畦编3种针织物。采用真空辅助树脂传递模塑成型(VARTM)技术,分别制备出6层纬平针、6层罗纹以及6层畦编织物复合材料板。对3种结构复合材料进行压缩试验,并比较分析了比压缩强度-应变曲线、比压缩能量-应变曲线、比压缩能量-应变拟合曲线,分析了压缩过程中的能量吸收情况及材料的破坏形式。结果表明:纬平针结构复合材料的比压缩强度和比压缩能量均最大,其次是罗纹,畦编最小;且3种结构复合材料的压缩破坏过程均不属于脆性破坏;由于材料表现出较好的柔韧性,试样的比压缩能量与压缩应变呈线性相关;相同结构复合材料纵、横向比压缩强度-应变曲线和比压缩能量-应变曲线几乎重合。基体沿增强结构呈分层现象的破坏和树脂的塑性变形是材料的主要破坏形式。
For high-performance ultra-high molecular weight polyethylene (UHMWPE) fiber characteristics, successfully weft plain pin, rib, knitting three knitted fabrics. Vacuum-assisted resin transfer molding (VARTM) technology was used to fabricate six layers of plain stitch, six layers of rib and six layers of braided composite panels respectively. Compression tests were carried out on three kinds of structural composites. Compressive strength-strain curves, specific compression energy-strain curves and specific compression energy-strain curves were compared. The energy absorption during compression and material failure form. The results show that the compressive strength and specific compressive energy of the weft flat needle structure composites are the largest, followed by the rib, the lowest compilation; And the compressive failure process of the three kinds of structural composites do not belong to brittle failure; As the material showed better The compressive energy of the sample is linearly related to the compressive strain. The longitudinal and transverse compressive strength-strain curves of the same structure and the compressive energy-strain curve are almost coincident with each other. The failure of the matrix to delaminate along the reinforced structure and the plastic deformation of the resin are the major forms of material destruction.