Chip formation model of cutting fiber-reinforced plastics perpendicular to fiber axis
Chip formation model of cutting fiber-reinforced plastics perpendicular to fiber axis
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DOI：
10.1115/1.2830100
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发表时间：
1998-02-01
影响因子：
4
通讯作者：
Hocheng, H
中科院分区：
文献类型：
--
作者：
Pwu, HY;Hocheng, H
纤维增强塑料的各向异性严重影响加工过程中的切屑形成和切割质量。纤维排列比经常受到压力的切割条件更占主导地位。本文研究了切屑形成，并为垂直于单向纤维轴的切削情况构建了原始模型。弯曲失效控制着该过程中的切屑形成。梁理论和层压力学用于建立切削力、切屑长度和厚度之间的相关性。所提出的模型可以解释实验结果的主要趋势。还发现由于固有键合缺陷而导致的芯片厚度分离以及由于局部材料强度不均匀而导致的芯片过度弯曲。它们是根据当前模型来理解的。
The anisotropy of fiber-reinforced plastics heavily influences the chip formation and cut quality during machining. Fiber arrangement is found more dominant than the often stressed cutting conditions. The present paper studies the chip formation and constructs an original model for the case of cutting perpendicular to the unidirectional fiber axis. Bending failure controls the chip formation in this process. Beam theory and laminate mechanics are used to establish the correlation between cutting force, chip length and thickness. The proposed model can explain the major trend of the experimental results. Chip separation in thickness due to intrinsic bonding defects and overbent chips due to inhomogeneous local material strength are also found. They are understood based On the current model.