Mechanical properties of basalt fiber reinforced wood-plastic composites
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摘要: 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。Abstract: 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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Key words:
- wood plastic composites /
- basalt fiber /
- mechanical properties /
- weak link /
- short fiber /
- composites
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