Study on Tearing of CFRP Thin Circular Tubes Machined by Ultrasonic Vibration Assisted Grinding

doi:10.3969/j.issn.1004-132X.2024.03.014

Abstract

Abstract: Aiming at the problems of tear damages in the ultrasonic vibration assisted grinding processes of CFRP composite thin tubes with unclear causes, ultrasonic vibration assisted grinding tests were carried out on M55J and T300 composite thin tubes, and the effects of ultrasonic amplitude, feed rate and spindle speed on grinding force and tear size were investigated. Through the force analysis of grinding processes and the calculation of the maximum thickness of undeformed chips, the formation reason of tear position and the change law of tear size were analyzed. The results show that the grinding force decreases with the increase of ultrasonic amplitude, increases with the increase of feed rate, and has little correlation with spindle speed. Tear is easy to appear on the inner walls of CFRP composite tubes, and the length and height decreases with the increase of ultrasonic amplitude, increases with the increase of feed rate, and decreases with the increase of spindle speed.

Key words: carbon fiber reinforced polymer(CFRP), thin tube, ultrasonic vibration assisted grinding, grinding force, tearing

摘要： 针对碳纤维增强复合材料(CFRP)薄管超声振动辅助磨削过程中存在撕裂损伤且形成原因不明确的问题，通过对M55J和T300复合材料薄管开展超声振动辅助磨削试验，探究了超声振幅、进给量及主轴转速对磨削力和撕裂尺寸的影响规律，通过对磨削过程的受力分析和对最大未变形切屑厚度的计算，分析了撕裂位置的形成原因和撕裂尺寸的变化规律。结果表明：磨削力随超声振幅的增大而减小，随进给量的增大而增大，与主轴转速的关联性较小；撕裂易出现于CFRP薄管内壁，其长度与高度随超声振幅的增大而减小，随进给量的增大而增大，随主轴转速的增大而减小。

关键词: 碳纤维增强复合材料, 薄管, 超声振动辅助磨削, 磨削力, 撕裂

CLC Number:

TB332

KANG Renke, LU Bingwei, CHEN Kailiang, LI Shengchao, DAI Jingbin, DONG Zhigang, BAO Yan. Study on Tearing of CFRP Thin Circular Tubes Machined by Ultrasonic Vibration Assisted Grinding[J]. China Mechanical Engineering, 2024, 35(03): 524-533，540.

康仁科, 陆冰伟, 陈凯良, 李晟超, 戴晶滨, 董志刚鲍, 岩. 超声振动辅助磨削CFRP复合材料薄管撕裂损伤研究[J]. 中国机械工程, 2024, 35(03): 524-533，540.

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