GOALI: Experimental and Theoretical Study of Springback in Arbitrarily Shaped Aluminium Panels

9503956 Triantafyllidis拟议的研究是一项实验和建模相结合的工作，旨在为任意几何形状的冲压铝板提供一致、省时的通用配方，以防止由于外部载荷移除和修边而产生的回弹。这项工作的基本思想是在冲压阶段结束时有效地利用薄板的薄膜溶液，以便预测其最终的弹性松弛形状。利用该方法对轴对称冲压件进行了初步的实验/分析可行性研究。在目前的调查中，计划将轴对称研究的结果推广到具有任意几何形状的冲压件。提出了一种通用的渐近建模技术来描述所讨论的问题，并规划了一套汽车生产模具。建模工作的结果将被纳入通用有限元代码，通用汽车和美国铝业将用于设计目的，作为GOALI倡议下的工业-大学合作项目的一部分。***

9503956 Triantafyllidis The proposed study is a combined experimental and modeling effort to provide a consistent, time-efficient general purpose formulation for the design against springback, due to external load removal and trimming, of stamped aluminum panels with arbitrary geometries. The basic idea in this work is the efficient use of the membrane solution of the sheet at the end of the punching phase in order to predict its final elastically relaxed shape. An initial experimental/analytical feasibility study which used the proposed idea has been completed for axisymmetric stampings. In the present investigation the plan is to generalize the results of the axisymmetric study to stampings with arbitrary geometry. A general asymptotic modeling technique is proposed to formulate the problem in question and a set of automotive production dies is also planned. The results of the modeling work will be incorporated into a general purpose FEM code which will be used for design purposes by GM and ALCOA as part of an Industry-University Collaborative Project under the GOALI Initiative. ***