摘要
为了研究超声喷丸工艺参数对TC4合金残余应力场及表面覆盖率的影响规律,利用商业软件采用静态方法建立了离散元与有限元(DEM-FEM)耦合的超声喷丸3维仿真模型,研究了超声喷丸工艺参数(振幅及丸粒直径)对TC4合金残余应力场的影响规律;采用节点PEEQ值法和图像分析2种方法获得工件表面覆盖率,研究了振幅对表面覆盖率的影响规律。结果表明:随着振幅和丸粒直径的增大,残余应力场的特征参量增大,表面残余压应力和最大残余压应力幅值分别可达到-691.83 MPa和-1047.97 MPa,残余压应力层深可达到0.61 mm;随着振幅的增大,表面覆盖率逐渐增大,增幅约为5%。与节点PEEQ值法和图像分析法相比,利用DEM-FEM耦合仿真方法可以快速获得超声喷丸后的表面覆盖率。
To investigate the influence of ultrasonic shot peening process parameters on the residual stress field and surface coverage of TC4 alloy,a coupled discrete element method and finite element method(DEM-FEM)3D simulation model was developed using com-mercial software.The study focused on the effects of process parameters(amplitude and shot diameter)on the residual stress field of TC4 alloy.Surface coverage of the workpiece was evaluated using two methods:node PEEQ method and image analysis,to study the influence of amplitude on surface coverage.Results indicated that with the increase of amplitude and shot diameter,characteristic parameters of the residual stress field increase.Surface residual compressive stress and maximum residual compressive stress amplitude reached-691.83 MPa and-1047.97 MPa respectively,with a residual stress depth up to 0.61 mm.As the amplitude increases,surface coverage gradually increases by approximately 5%.Compared with the node PEEQ and image analysis method,the coupled DEM-FEM simulation method can quickly obtain surface coverage following ultrasonic shot peening.
作者
闫锡超
张洪伟
陈涛
常杰
YAN Xi-chao;ZHANG Hong-wei;CHEN Tao;CHANG Jie(School of Intelligent Manufacturing and Control Engineering,Qilu Institute of Technology,Jinan 250200,China;School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Sanhe Huaxia Hengtai Electronics Technology Co.,Ltd.,Langfang Hebei 065201,China)
出处
《航空发动机》
北大核心
2024年第6期161-167,共7页
Aeroengine
