研究了用短切玄武岩纤维（BF）增强木塑（WPC）复合材料（BF/WPC）体系中,BF的含量与BF/WPC力学性能之间的关系,定性探讨了纤维增强机制。结果表明,与WPC相比,除断裂伸长率有所下降之外,BF/WPC的拉伸强度、冲击强度、弯曲强度均有明显提高,且这些性能取得最大值时BF的质量分数分别为15%~30%、15%~25%、20%~30%,提高的幅度约为30%。提出了＂弱端面＂的定性假说,由此解释了BF/WPC各项强度指标与增强纤维含量之间存在着最大值现象的原因。
The relationship between the content of basalt fiber（BF） and the mechanical properties of basalt fiber reinforced wood plastic composites（BF/WPC） was studied.The reinforcement mechanism of the materials was also discussed.The results show that except a little decline of elongation,the tensile strength,impact strength and bending strength of BF/WPC are enhanced and the maximum of them increases about 30%,compared with pure WPC,when the content of BF is between 15%~30%,15%~25% and 20%~30%,respectively.Therefore,a qualitative hypothesis that the end cross section of BF is the ＂weak link＂ is proposed,which could explain the maximum range between the strength index and the mass fraction of fiber.
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