Process Optimization for Dimensional Accuracy in Polymer Composites

聚合物复合材料尺寸精度的工艺优化

• 批准号: 9610382
• 负责人: Scott White
• 金额: $ 30.52万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9610382&HistoricalAwards=false
• 关键词: Process; Optimization; Dimensional; Accuracy; Polymer

DMI-9610382 White Warpage is the manifestation of residual stresses in composite structures. For the automotive industry warpage leads to problems with the fit and finish of body panel components. Dimensional accuracy is critical when mating two body panels together at the joints. Extreme surface tolerances are also critical in order to produce panels with smooth, glossy finishes. Residual stresses will also ultimately lead to reduction in durability. Strength issues associated with durability will become more important as composites are gradually incorporated into the primary load bearing components of the car. This research project is focused on process-induced residual stresses in composite parts and their effect on the dimensional stability of the manufactured component. The fundamental objectives of the proposal are: (1) to develop a fundamental, mechanics-based understanding of the factors that control dimensional accuracy and residual stresses in polymer-matrix composite parts; (2) to create analytical and computational tools that will allow engineers to predict the final dimensions and stresses in composite parts, and to anticipate the effect of processing variables; and (3) to combine these analytical and numerical tools with recent developments in optimization techniques to achieve optimal manufacturing processes that minimize warpage and residual stress. This collaborative research project addresses fundamental issues on the understanding of factors that control dimensional accuracy and residual stresses in polymer-matrix parts. The research project has a balance between theory and experiment, and will provide valuable findings for the composite manufacturing industry.

9610382白色翘曲是复合材料结构中残余应力的表现形式。对于汽车行业来说，翘曲会导致车身面板部件的配合和光洁度问题。当两个车身覆盖件在连接处配合在一起时，尺寸精度是至关重要的。极高的表面公差对于生产具有光滑、光滑表面的面板也是至关重要的。残余应力最终也会导致耐久性降低。随着复合材料逐渐融入汽车的主要承重部件，与耐用性相关的强度问题将变得更加重要。本课题主要研究复合材料零件的工艺残余应力及其对制件尺寸稳定性的影响。该提案的基本目标是：(1)对控制聚合物基复合材料零件的尺寸精度和残余应力的因素有一个基本的、以力学为基础的了解；(2)创建分析和计算工具，使工程师能够预测复合材料零件的最终尺寸和应力，并预测加工变量的影响；以及(3)将这些分析和数值工具与优化技术的最新发展相结合，以实现最大限度地减少翘曲和残余应力的最佳制造工艺。该合作研究项目致力于了解控制聚合物基件尺寸精度和残余应力的因素的基本问题。该研究项目在理论和实验之间取得了平衡，将为复合材料制造业提供有价值的研究成果。