随机短纤维增强气压砂轮基体性能的研究

发布时间：2019-01-20 19:08

【摘要】：为增强软固结磨粒气压砂轮基体的耐疲劳性和抗撕裂性,提出了基于短纤维增强理论调控气压砂轮基体力学性能的方法.分析了芳纶浆粕(PPTA-Pulp)短纤维增强气压砂轮基体性能的作用机理,通过理论公式与拉伸试验的相互验证,得出了增强后气压砂轮基体的弹性模量随短纤维添加比例增大而增大的规律;通过短纤维不同添加比例的气压砂轮基体裤型试样的撕裂对比试验,证明了短纤维增强气压砂轮基体在提高抗撕裂性方面的有效性;仿真分析了增强后气压砂轮在不同工况下接触区域的应力分布特性,通过加工试验,验证了短纤维增强气压砂轮对高硬度、高耐磨性模具高效加工的能力.
[Abstract]:In order to enhance the fatigue resistance and tear resistance of the pneumatic abrasive wheel matrix, a method to control the mechanical properties of the pneumatic wheel matrix based on the short fiber reinforcement theory was proposed. The mechanism of aramid pulp (PPTA-Pulp) short fiber reinforced air pressure grinding wheel matrix was analyzed, and the mutual verification of theoretical formula and tensile test was carried out. The law that the elastic modulus of air pressure grinding wheel matrix increases with the increase of the proportion of short fiber after reinforcement is obtained. Through the tear test of air pressure wheel matrix with different proportion of short fiber, it is proved that short fiber reinforced air pressure wheel matrix is effective in improving tear resistance. The stress distribution characteristics of the contact region of the reinforced pneumatic grinding wheel under different working conditions are analyzed by simulation. The processing tests show that the short fiber reinforced pneumatic grinding wheel can efficiently process the mould with high hardness and high wear resistance.
【作者单位】：浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室;
【基金】：国家自然科学基金项目(51175471,50575208,51205358) 浙江省科技厅创新团队项目(2011R50011-07)
【分类号】：TG743

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