超声振动软化Johnson-Cook模型建立及薄管卷边实验验证

doi:10.3969/j.issn.1004-132X.2024.12.002

摘要/Abstract

摘要： 为准确描述轻质薄壁构件在超声振动辅助成形中的变形行为，以TU1无氧铜和316L不锈钢为对象，开展超声振动法向激励辅助单向拉伸试验。考虑超声振动软化效应，通过引入新的超声软化函数，建立一种超声振动Johnson-Cook模型。开发自定义子程序将模型嵌入有限元软件进行模拟，且与单向拉伸试验和卷边试验进行对比验证。结果表明：数值模型可有效捕捉材料超声振动软化行为，平均绝对比例误差最低可达0.97%。虽然不同材料对超声振动的敏感性不同，但其超声软化率与超声能场密度均符合一种Allometricl函数关系。

关键词: 超声振动, Johnson-Cook模型, 超声软化, 有限元仿真

Abstract: In order to accurately describe the deformation behaviors of lightweight thin-walled components during ultrasonic vibration-assisted forming, ultrasonic vibration normal excitation-assisted uniaxial tensile experiments were carried out with TU1 oxygen-free copper and 316L stainless steel. Considering the ultrasonic vibration softening effects, an ultrasonic vibration Johnson-Cook model was developed by introducing a new ultrasonic softening function. A subroutine was developed and embedded into finite elements for simulation, and was validated by comparison with unidirectional tensile and curling experiments. The results show that the numerical model may effectively capture the ultrasonic vibrational softening behaviors of the materials with an average absolute percentage error as low as 0.97%. Although different materials have different sensitivities to ultrasonic vibration, the ultrasonic softening rates all follow an Allometricl functional relationship with the ultrasonic energy field density.

Key words: ultrasonic vibration, Johnson-Cook model, ultrasound softening, fimite element simulation

中图分类号:

TG335.5

宋鹏飞1, 2, 曹秒艳1, 2, 付敏1, 2, 崔亚硕1, 2, 李云峰1, 2, 刘政1, 2. 超声振动软化Johnson-Cook模型建立及薄管卷边实验验证[J]. 中国机械工程, 2024, 35(12): 2106-2113，2121.

SONG Pengfei1, 2, CAO Miaoyan1, 2, FU Min1, 2, CUI Yashuo1, 2, LI Yunfeng1, 2, LIU Zheng1, 2. Ultrasonic Vibration Softening Johnson-Cook Modeling and Validation of Thin Tube Curling Experiments[J]. China Mechanical Engineering, 2024, 35(12): 2106-2113，2121.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2024.12.002

http://www.cmemo.org.cn/CN/Y2024/V35/I12/2106

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