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基于LSDYNA有限元平台火车车厢小弯梁板材成形研究
英文标题:Forming research on railway carriages small curved beam based on LS-DYNA finite element platform
作者:何亚峰 干为民 
单位:常州工学院 江苏省数字化电化学加工重点实验室 
关键词:火车车厢小弯梁板材 LSDYNA 成形极限 板材成形 
分类号:TG386
出版年,卷(期):页码:2013,38(1):40-44
摘要:

火车车厢小弯梁板材用于车厢顶部位置以提高承载能力,由于成形过程受到非线性相互耦合作用影响,其变形机理非常复杂。本文针对火车车厢小弯梁板材利用LSDYNA有限元平台进行了动态数值模拟,得到了成形过程中应力场量、成形极限图和板材减薄率分布规律,进而分析了板材成形中出现破裂和拉裂等的机理。同时,探讨了工艺参数(摩擦系数、凹模圆角)对火车车厢小弯梁板材成形力的影响关系,其结果可为火车车厢小弯梁板材模具设计者提供一定的理论参考和依据。
 

Railway carriage small curved beam is used in the carriage top position in order to improve the loading capacity, whose deformation mechanism is very complex because of forming process by the nonlinear mutual coupling. The distribution of stress field, forming limit diagram and sheet thinning rate in railway carriage small curved beam forming were obtained by numerical simulation dynamically, and then the mechanism of rupture and crack in sheet forming was analyzed. At the same time, the relationship of process parameters (coefficient of friction, die fillet) and railway carriage small curved beam metal forming force was discussed and the results provide a theoretical reference for railway carriage small curved beam die.
 

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