钼纤维含量对机床用树脂矿物复合材料力学性能影响

Influence of Mo-fiber Content on Mechanical Properties of Resin Mineral Composite for Machine Tool

树脂矿物复合材料(RMC)以其优良的阻尼减振性能在机床床身等基础件方面应用越来越广泛。采用在RMC中加入不同质量分数的钼纤维提高其力学性能,通过单因素试验研究纤维含量对RMC抗压、抗弯强度的影响规律,并通过有限元模拟分析、验证实验结果。研究结果表明,随着钼纤维含量的增加,RMC的抗压、抗弯强度先增大后减小。当钼纤维含量占RMC试样总质量的1.2%时,既可以保证产生足够的界面结合力,又能有效避免纤维结团现象,达到最佳增强效果。其抗压、抗弯强度最大值分别达到147.2 MPa、37.6 MPa,比无纤维增强的RMC分别提高了19.7%、31%。

Resin mineral composite（ RMC） is more and more widely used to manufacturing elementary machine components for its excellent vibration alleviation performance. In this paper,Mo fibers with different mass fraction are added to RMC to improve its mechanical properties. Single factor experiments have been carried out to study the influence of fiber content on compression and flexural strength of RMC. And finite element simulation is employed to analyze and validate experimental results. The results show that with the increase of fiber content,compression and flexural strength of Mo-fiber reinforced RMC first increases and then decreases. The reinforcing effect is best if Mo-fiber content occupies 1. 2% of the total mass,which not only guarantees enough interfacial bonding strength but also avoids twisted cluster effectively. Compression and flexural strength of RMC with Mo fibers can reach the maximum value of147. 2MPa and 37. 6MPa respectively,which is separately increased by 19. 7% and 31% compared with no fiberreinforced RMC.