| Finite Element Method Analysis of Stress Field Considering Thermal Coupled Force During Laser Process |
| |
| 作者姓名： | Gang Fan Yihong Guan Jiatao Zhang Honggang Wang Kunming University of Science and Technology Kunming China |
| |
| 作者单位： | Gang Fan，Yihong Guan，Jiatao Zhang，Honggang Wang Kunming University of Science and Technology，Kunming，650093，China |
| |
| 摘 要： | IntroductionLaserphasetransformationhardeningisanewtechnologyduringwhichlaserheatresourceactsdirectlyonsurfaceofmaterialandcompositionscharacteristicofmaterialischanged.Thetechnologyproce8sesacharacterofrapidheatvelocity,highheattempelatureandquickcoolingspeed(l0'col0'aC/s).Thecompositionandcharacteristicofmaterialvariedwithvariousinnertemperaturewillleadtothermalresidualstress.Itiswellknownthattheresidualstressaffectssignificantlyoncharacteristicofmaterial,suchasimProvingstrengthoffatigUere…
|
Finite Element Method Analysis of Stress Field Considering Thermal Coupled Force During Laser Process |
| |
| Gang Fan,Yihong Guan,Jiatao Zhang,Honggang Wang Kunming University of Science and Technology,Kunming,,China.Finite Element Method Analysis of Stress Field Considering Thermal Coupled Force During Laser Process[J].Journal of Shanghai Jiaotong university,2000(1). |
| |
| Authors: | Gang Fan Yihong Guan Jiatao Zhang Honggang Wang Kunming University of Science and Technology Kunming China |
| |
| Institution: | Gang Fan,Yihong Guan,Jiatao Zhang,Honggang Wang Kunming University of Science and Technology,Kunming,650093,China |
| |
| Abstract: | According to the prominent characteristic of rapid heating and cooling velocity in process of laser phase transformation hardening, it is important and necessary to consider the couple relation among temperature, phase transformation and stress. Based on the above, a mathematical model to analyze transformation and to reflect its characteristic is presented. Also temperature field control equation relative to stress and phase transformation is set up and thermal elastoplastic constitutive equation containing phase transformation was derived, In a given yield condition, temperature and stress field are numerically calculated by means of Finite Element Method. The result indicates the calculation value coincides with result of test Stress especially thermal stress varied violently in process of laser phase transformation hardening, which leaded to the residual stress on the surface and accorded to the fact. This process can improve the characteristic of material, so it is significant to study on thermal stress of laser quenching, to discuss the effect of phase transformation and stress on temperature, to optimize the laser quenching process and to improve the synthetic mechanic properties of quenching material. |
| |
| Keywords: | Laser Phase Transformation Hardening Constitutive Equation Thermal Stress Residual Stress Couple Couple |
| 本文献已被 CNKI 等数据库收录！ |
