| 查看: 703 | 回复: 1 | |||
[求助]
急求一篇英文期刊的引言（什么类型都可以，只要引言）
|
|
急求一篇英文期刊的引言（什么类型都可以，只要引言）急求一篇英文期刊的引言（什么类型都可以，只要引言） 十分感谢  |
回复此楼» 猜你喜欢
0703化学 305求调剂
已经有6人回复
-
一志愿211，0703化学310分求调剂
已经有3人回复
-
广西大学材料导师推荐
已经有5人回复
-
化学调剂
已经有5人回复
-
资源与环境 调剂申请(333分)
已经有4人回复
-
311求调剂
已经有14人回复
-
269专硕求调剂
已经有4人回复
-
085600材料与化工306
已经有3人回复
-
一志愿西安交通大学材料工程专业 282分求调剂
已经有12人回复
-
材料求调剂
已经有5人回复
霜小妹二
木虫 (正式写手)
哈哈
- 博学EPI: 15
- 应助: 154 (高中生)
- 金币: 1806.7
- 红花: 25
- 帖子: 531
- 在线: 66小时
- 虫号: 3237838
- 注册: 2014-05-27
- 专业: 机械动力学
【答案】应助回帖
|
Abstract Based on the models about transformation kinetics, transformation plasticity and creep strain, a numerical modeling used to simulate the metallo-thermo-mechanical behaviors during quenching and tempering is presented. And this modeling is coded into program Numerical Simulation of Heat Treatment (NSHT), which is veri!ed to be e9ective in simulation of heat treatment by comparing with the measured results. With this program, conventional quenching and tempering processes used for treatment of a 6 MW rotor are analyzed, the calculated results of which are compared with those of the newly designed processes. Based on these comparisons, some pieces of advice about heat treatment are given as instructions to industrial processing, which are proved to be e9ective in industry. Introduction During heat treatment of forgings with large sizes, internal stresses arise due to temperature gradient and unsynchronous transformation in the surface layer and inner layer [1,2]. Sometimes these stresses are high enough for the appearance of crack, which even possibly lead to fracture of work-piece. In order to avoid this, it is necessary to decrease the magnitude of internal stresses as soon as possible. Because physical simulation is diBcult to establish a model in satisfying the similarity criterions simultaneously in thermal Cow, microstructure change and stress distribution, !nite element method is explored to present and analyze the evolution of internal stresses through coupled calculations of metallo-thermo-mechanical behaviors during thermo-mechanical processing. Besides HEARTS [3,4] and SYSWELD [5] being developed mainly for numerical simulation of heat treatment, other commercial software packages like ABAQUS [6], DEFORM [7] and so on are also enlarging their functions by considering heat treatment. However, most of them considered only one or two parts of the following aspects—stress-induced transformation kinetics, transformation plasticity and creep strain. In this work, a FEM modeling for quenching and tempering processes is established by incorporating these three aspects, and software Numerical Simulation of Heat Treatment NSHT based on this modeling is developed and then used to calculate metallo-thermo-mechanical behaviors during quenching and tempering processes of a 6 MW rotor. 完了~ paper题目： A FEM modeling of quenching and tempering and its application in industrial engineering |
2楼2016-06-07 14:02:44
