US-Egypt Cooperative Research: Modeling and Management of Process Induced Shape Distortion in Sheet Forming Processes

美国-埃及合作研究：板材成型过程中工艺引起的形状畸变的建模和管理

• 批准号: 0211196
• 负责人: Ahmed Sherif El-Gizawy
• 金额: $ 2.5万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0211196&HistoricalAwards=false
• 关键词: US; Egypt; Cooperative; Research; Modeling

0211196ElgizawyDescription: This award is to support a collaborative project between Dr. A. Sherif El-Gizawy, Department of Mechanical and Aerospace Engineering at the University of Missouri, Columbia, Missouri and Dr. Maher Younan, Department of Mechanical Engineering, the American University of Cairo, Cairo, Egypt. The main goal of the work is to develop an understanding of the interactions between sheet-forming process variables and resulting properties, based on characterization and space-time evolution of process-induced damage. The investigators plan to develop an effective method for characterization and management of process-induced distortion in sheet forming. The nonlinear finite element method (FEM) is combined with an optimization scheme based on Genetic Algorithm (GA) for defining the process condition for global minimization of distortion in sheet metal products. The developed numerical model will be verified experimentally using high strength sheet materials. Implementation of the proposed approach in the stamping industry will increase the robustness of forming processes and improve the quality and consistency of stampings. Scope: Process-induced distortions due to spring-back, wrinkles, and excessive localized thinning alter the product geometry from the designed one, and cause difficulties in joining and assembly of sheet products as in the cases of auto-body and airframe assemblies. The work is expected to yield models that can be used for design, control, and optimization of processes for fabrication sheet metal products. The PI's novel approach is based on a combination of FEA and genetic algorithms. The successful demonstration of the results could lead to commercial solutions for one of the major outstanding problem in design of sheet forming dies: predicting and avoiding springback problems. This collaborative research will integrate modeling with experimental observations to determine the effects of different process parameters to characterize and manage process-induced distortions, and will provide unique training for conducting engineering research for graduate and undergraduate students in both Egypt and the United States. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.

0211196 Elgizawy描述：该奖项是为了支持博士之间的合作项目。Sherif El-Gizawy，密苏里州，哥伦比亚大学机械和航空航天工程系，密苏里州和Maher Younan博士，埃及开罗美国大学机械工程系。 这项工作的主要目标是了解板材成形工艺变量和由此产生的性能之间的相互作用，基于过程引起的损伤的表征和时空演变。 研究人员计划开发一种有效的方法来表征和管理板料成形过程中的变形。 将非线性有限元法（FEM）与基于遗传算法（GA）的优化方法相结合，确定了板料变形全局最小化的工艺条件。 所开发的数值模型将使用高强度板材进行实验验证。 在冲压行业实施所提出的方法将增加成型工艺的鲁棒性，并提高冲压件的质量和一致性。 适用范围：由于回弹、褶皱和过度局部减薄而引起的过程引起的变形改变了产品的几何形状，使其偏离设计的几何形状，并且在汽车车身和机身装配的情况下，在片材产品的连接和装配中引起困难。 这项工作预计将产生模型，可用于设计，控制和优化制造钣金产品的过程。 PI的新方法是基于FEA和遗传算法的组合。 结果的成功演示可能会导致商业解决方案的一个主要突出的问题，在板成形模具的设计：预测和避免回弹问题。这项合作研究将整合建模与实验观察，以确定不同工艺参数的影响，以表征和管理过程引起的扭曲，并将为埃及和美国的研究生和本科生进行工程研究提供独特的培训。 该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，以开展这些合作活动。