W.F. Wu
金属学报(英文版)
A mathematical model has been built to numerically predict the thermal history of thin slab during CSP (compact strip process) rolling. To estimate the temperature distribution in the slab more accurately, the mathematical model combines heat transfer in the slab, in the roll, and at the roll-slab interface during bite. The numerical results agree with on-site running data, which proves the reliability of the mathematical model. The results show that roll chilling has a significant effect on the temperature distribution in the slab.
关键词:
numerical simulation
,
数值模拟
,
连铸连轧过程
,
热过程
Guangquan Yue Boming Zhang Fuhong Dai Shanyi Du
材料科学技术（英）
Stiffened thermosetting composite panels were fabricated with co-curing processing. In the co-curing processing, the temperature distribution in the composite panels was nonuniform. An investigation into the three-dimensional cure simulation of T-shape stiffened thermosetting composite panels was presented. Flexible tools and locating tools were considered in the cure simulation. Temperature distribution in the composites was predicted as a function of the autoclave temperature history. A nonlinear transient heat transfer finite element model was developed to simulate the curing process of stiffened thermosetting composite panels. And a simulation example was presented to demonstrate the use of the present finite element procedure for analyzing composite curing process. The glass/polyester structure was investigated to provide insight into
the nonuniform cure process and the effect of flexible tools and locating tools on temperature distribution. Temperature gradient in the intersection between the skin and the flange was shown to be strongly dependent on the structure of the flexible tools and the thickness of the skin.
关键词:
Thermosetting composite
,
加筋壁板
,
共固化
,
数值模拟
李胜祗
,
陈大宏
,
孙中建
钢铁研究学报
用MARC/Autoforge有限元软件,对圆坯的横轧过程进行了热-力学耦合分析,得到了变形和应力分布.用数值分析法研究了横轧圆坯时出现破裂的倾向性.结果表明:当圆坯的变形积累到一定程度时,坯料中心韧性破裂的倾向性增强,直至开始出现裂纹.随着轧制进程的继续,韧性断裂区逐渐扩展.
关键词:
钢坯
,
横轧
,
应力
,
应变
,
塑性变形
,
破裂
,
有限元法
,
热-力学耦合
,
数值模拟
李峰
,
林俊峰
,
张鑫龙
,
潘强荣
材料科学与工艺
实现晶粒细化的传统塑性加工工艺所需工序多且要求较高，为了解决这些问题，本文提出了一种能够实现金属材料制备及成形一体化的挤压成形新工艺——连续变截面直接挤压成形技术，对不同工艺条件的连续变截面挤压成形过程的数值模拟研究表明：当模角由90°增大至140°时，塑性区范围明显扩大，金属流动均匀性随之提高；模口处轴向拉应力数值减小了20％，降低了表面产生开裂的可能性；模角为90°时变截面型腔处存在死区缺陷，且流线折叠倾向较严重，模角为140°时成形过程中坯料与型腔间易出现空隙，分析认为，本文条件下模角为120°的情况比较理想。
关键词:
挤压成形
,
成形技术
,
变截面
,
加工工艺
,
数值模拟
,
成形过程
,
流动均匀性
,
晶粒细化
机械工程材料
＂第七届材料与热加工物理模拟及数值模拟国际学术会议＂定于2013年6月16～19日在芬兰奥卢大学（Oulu University）举行,奥卢大学是北欧最著名的综合性大学之一,奥鲁市位于北欧的北部,毗邻北极圈和圣诞老人的故乡罗瓦涅米。
关键词:
国际学术会议
,
数值模拟
,
物理模拟
,
热加工
,
材料
,
综合性大学
,
北极圈
,
北欧
