竹原/亚麻复合材料力学性能的模糊评判

Fuzzy evaluation of the mechanical properties of bamboo/flax composites

采用竹原纤维、亚麻纤维作为增强体,低熔点聚酯纤维(LMPET)及丙纶纤维(PP)做基体,通过非织造工艺制作混合纤维预成型件,采用模压成型工艺制作植物纤维增强复合材料。用模糊综合评判的方法,探讨增强相与基体相选用的纤维种类及纤维质量百分率对材料力学性能的影响。利用扫描电镜研究了复合材料拉伸断口的形貌。结果表明:LMPET/40%竹原纤维复合材料的力学性能最优,纵、横向拉伸强度分别为136.00 MPa和87.58 MPa;纵、横向弯曲强度分别为534.00 MPa和470.00 MPa,超过了普通工程塑料的水平。

The composite materials were manufactured with the low melting point polyester （LMPET） and polypropylene （PP） as mattress and bamboo and flax fibers as reinforcement by nonwoven ＆ heat molding technologies. Fuzzy evaluation method was undertaken to investigate the influence of fiber kind, fiber percentage by weight of the mattress and reinforcement on the mechanical properties of the composites. The fracture surfaces of composites were examined by scanning electron microscopy （SEM）. The results reveal that the mechanical properties of the LMPET/40% bamboo fibers composite is the best with tensile strength 136.00 MPa and 87.58 MPa and flexural strength 534.00 MPa and 470.00 MPa in longitudinal and transverse directions respectively, outperforming the common engineering plastic.