局部加载条件对筋板类构件成形材料流动影响的模拟研究  

Simulation on Influence of Local Loading Conditions on Material Flow during Rib-web Components Forming

作　　者：吴跃江[1] 杨合[1] 孙志超[1] 樊晓光[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《中国机械工程》2006年第S1期12-15,共4页China Mechanical Engineering

基　　金：国家杰出青年科学基金资助项目(50225518);塑性成形模拟及模具技术国家重点实验室开放基金资助项目(06-2)

摘　　要：提取并设计了两种能够有效反映筋板类构件成形特点的T形结构。基于DE-FORM有限元软件,研究了局部加载条件(压下区宽度、过渡区宽度、外端约束)对成形过程中材料流动行为的影响规律。结果表明:随着压下区宽度的减小,材料变形行为从镦挤变形模式逐步向剪切变形模式转变;分流线位置随着压下区宽度的减小显著内移,而压下量对其影响不明显;过渡区宽度和外端约束对筋错移、过渡区鼓包和筋充填深度差影响显著。研究结果为筋板类构件成形过程合理局部加载工艺方案的确定提供指导。The loading conditions play an important role in the quality and the process during large-scale and complex rib-web components forming. In this paper, Two T-shaped structures, which could comprehensively reflect the forming characteristics of rib-web components, were put forward and investigated. The influence law of loading conditions, such as loading area, transitional area and outside restriction, on the material flow and filling during forming process was explored, based on the rigid-viscoplastic finite...

关 键 词：筋板类构件 局部加载条件 材料流动 数值模拟 

分 类 号：TG319[金属学及工艺—金属压力加工]