功能梯度材料制动盘热-力耦合分析及结构优化  

Thermo-mechanical coupled analysis and structural optimization of functionally graded materials brake disc

作　　者：张庆永 何立科 王辉 许赛芸 王宇超 左一成 杨旭东 ZHANG Qingyong;HE Like;WANG Hui;XU Saiyun;WANG Yuchao;ZUO Yicheng;YANG Xudong(School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建工程学院机械与汽车工程学院,福建福州350118

出　　处：《兵器材料科学与工程》2023年第2期12-18,共7页Ordnance Material Science and Engineering

基　　金：国家自然科学青年基金(52205340);福建省自然科学基金青年基金(2021J05214);福建省增材制造创新中心开放课题(ZCZZ202-05);福建省财政厅项目(GY-Z21004);福建工程学院科研启动基金(GY-Z19122)。

摘　　要：用Abaqus有限元软件仿真分析功能梯度材料(FGM)制动盘在制动工况下的热-力耦合状态。FGM制动盘用夹心梯度式分布结构,中心为纯AlSi10Mg合金,表面为铸铁HT250,中间材料呈梯度分布逐渐过渡。通过比较FGM、纯铝合金、纯铸铁制动盘表面温度场和热应力场分布,分析FGM结构的特点。结果表明:同种工况下的高强度热冲击,FGM制动盘的安全系数最高,使用寿命更长。同时研究了一种不同分级指数n控制下的不同梯度特征结构,分级指数n为1.5时,FGM制动盘的热-力学性能和减质量效果最佳。Abaqus finite element software was used to analyze the thermo-mechanical coupling state of the functionally graded materials(FGM)brake disc under braking. FGM brake disc adopted sandwich gradient distribution structure whose core part was pure AlSi10Mg alloy and the surface material was cast iron HT250. The inner material gradually transited in gradient distribution. The characteristics of FGM structure were investigated by comparing the temperature field and thermal stress field distribution on the surface of brake disc made of FGM,pure aluminum alloy,and pure cast iron,respectively. The results show that FGM brake discs has the highest safety factor and longer service life under high-strength thermal shock of the same working condition. At the same time,a different gradient characteristic structure under a control of different gradation index was also studied. The results show that thermo-mechanical performance and weight reduction of the FGM brake discs are the best when the gradation index n is 1.5.

关 键 词：功能梯度材料 分级指数 温度场 热应力场 热-力学性能 

分 类 号：U465.6[一般工业技术—材料科学与工程] U463.512[机械工程—车辆工程]