摘要
分析了超声滚压过程中Inconel 718高温合金的力学响应,基于Hertz接触理论确定有限元模型主要参数,建立考虑卸载后结构回弹的超声滚压有限元模型,模拟分析了超声滚压后合金的残余应力分布与塑性应变分布,通过与试验结果进行对比,验证了模型的可靠性。结果表明:相比未考虑结构回弹,考虑结构回弹模拟表层残余压应力和残余压应力影响深度较大,更接近试验结果,考虑结构回弹后残余压应力影响深度预测相对误差由未考虑结构回弹的17.93%下降至1.09%;考虑结构回弹的有限元模型具有高可靠性,能够准确描述25~175μm层深内应变趋势特征,模拟结果与试验结果具有一致的增量响应。
The mechanical response of Inconel 718 high temperature alloy during ultrasonic rolling was analyzed.The main parameters of the finite element model were determined by Hertz contact theory and the ultrasonic rolling finite element model considering structure rebound after unloading was established.The residual stress distribution and plastic strain distribution were simulated and analysed,and compared with the experimental results to verifying the reliability of the model.The results show that compared with the simulation without considering the structure rebound,the simulation considering the structure rebound showed an increase in the residual compressive stress on the surface layer and the influence depth of the residual compressive stress,which was closer to the experimental results.The relative error of the influence depth of residual compressive stress decreased from 17.93%without considering structure rebound to 1.09%considering the structure rebound.The finite element model considering the structure rebound had high reliability and could accurately describe the strain trend characteristics within the layer depth of 25‒175μm,the test results had a consistent incremental response with the experimental results.
作者
黄华浙
阮友赐
马挺
尹存宏
胡雄风
李能
HUANG Huazhe;RUAN Youci;MA Ting;YIN Cunhong;HU Xiongfeng;LI Neng(College of Mechanical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Anji Aviation Precision Casting Co.,Ltd.,Anshun 561000,China)
出处
《机械工程材料》
北大核心
2025年第7期128-134,共7页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(52405180)
贵州省科技计划项目(JSZX(2025)001)。
作者简介
黄华浙(1999-),男,贵州贵阳人,硕士研究生;通信作者:尹存宏,副教授,导师。
