影响TRB单向拉伸的几何参数研究  

Research of geometric parameters related to TRB uniaxial tension test

作　　者：李艳华[1] 杜继涛[1] 费宏斌[1] 

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《现代制造工程》2010年第3期83-85,107,共4页Modern Manufacturing Engineering

基　　金：上海市研究生创新基金项目(JWCXSL0902);上海市重点学科建设项目资助(J50503)

摘　　要：将连续变截面辊轧板(Tailor Rolled Blanks,TRB)厚度过渡区离散为有限数量的等厚度区域,采用线性插值的方法描述TRB材料的非均匀性,建立TRB材料的应力应变场。参照等厚度板的单向拉伸试验国家标准,提出TRB单向拉伸试验的概念,在有限元软件ABAQUS中建立TRB单向拉伸的数学模型。以影响TRB单向拉伸的板料过渡区长度、板料厚度比等为参数,以厚度过渡区伸长率和厚度过渡区移动量等为评价标准,通过数值模拟和回归分析对不同方案下的厚度过渡区伸长率和厚度过渡区移动量进行比较。最后得到板厚比和伸长率之间关系的三次拟合曲线,分析厚度过渡区长度、板厚比对厚度过渡区移动量的影响。其结果为TRB拉伸性能标准的制定以及推动TRB在车身轻量化上的应用提供了重要的技术参考。Thickness transition zone of TRB is divided into a limited number of discrete areas, and then the non-uniformity of TRB material is described by linear interpolation method, the stress-strain field of TRB material is established in the end. The concept of uniaxial tensile test is proposed according to the national tensile test standards of metal sheet with constant thickness, and the numerical models of TRB uniaxial tensile test are established in the ABAQUS software. The thickness transition zone length and the thickness ratio are considered as parameters which affect the TRB uniaxial tensile test, and the thickness transition zone elongation and thickness transition zone displacement are regarded as target, comparison is undertaken between elongation and dis- placement through numerical simulation and regression analysis. Finally, cubic curves of the relationship between elongation and the thickness ratio are obtained, and the impact of length and thickness ratio with regard to displacement is analyzed. The results provide important technical reference for formulation of TRB uniaxial tension test standard and can promote the light-weight application of TRB on the automobiles.

关 键 词：连续变截面辊轧板 有限元建模 单向拉伸 

分 类 号：TG389[金属学及工艺—金属压力加工]