超声振动软化Johnson-Cook模型建立及薄管卷边实验验证  

Ultrasonic Vibration Softening Johnson-Cook Modeling and Validation of Thin Tube Curling Experiments

作　　者：宋鹏飞 曹秒艳[1,2] 付敏 崔亚硕 李云峰 刘政 SONG Pengfei;CAO Miaoyan;FU Min;CUI Yashuo;LI Yunfeng;LIU Zheng(School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004;Hebei Light Structural Equipment Design and Manufacturing Technology Innovation Center,Qinhuangdao,Hebei,066004)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]河北省轻质结构装备设计与制备工艺技术创新中心,秦皇岛066004

出　　处：《中国机械工程》2024年第12期2106-2113,2121,共9页China Mechanical Engineering

基　　金：国家自然科学基金(51775480);河北省自然科学基金(E2018203143)。

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。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.

关 键 词：超声振动 Johnson-Cook模型 超声软化 有限元仿真 

分 类 号：TG335.5[金属学及工艺—金属压力加工]