RESEARCH INITIATION: Modeling the Deformation Processing ofSolid Thermoplastics

研究启动：模拟固体热塑性塑料的变形过程

• 批准号: 8810411
• 负责人: Geoffrey Eggert
• 金额: $ 7万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-10-15 至 1991-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8810411&HistoricalAwards=false
• 关键词: RESEARCH; INITIATION; Modeling; Deformation; Processing

A model for the large deformation processing of thermoplastics in the solid phase will be developed based on a viscoplastic finite element formulation in order to take advantage of the inherent rate- dependent behavior of solid thermoplastics during forming. An implicit time integration scheme will be used to account for elastic effects during forming. Special attention will be paid to the form and origin of the material descriptions. Models motivated by microstructural considerations will be given preference with some developmental effort expected in that area. Application of the forming model will be made to thermoplastic forming processes for which experimental data is available in the literature. Consideration will be given to transient problems, such as sheet forming, and to processes which may be modeled as steady-state, such as extrusion and cold-drawing. The ultimate product of the research should be a predictive model with application to the design and development of processes for the manufacturing of thermoplastics.

为了利用固体热塑性塑料在成型过程中固有的速率相关行为，基于粘塑性有限元公式，建立了热塑性塑料在固相中的大变形加工模型。将使用隐式时间积分格式来考虑成形过程中的弹性效应。将特别注意材料描述的形式和来源。以微观结构考虑为动机的模型将得到优先考虑，预计将在这一领域做出一些发展努力。将该成形模型应用于实验数据在文献中可用的热塑性成形工艺。将考虑板材成形等暂态问题，以及可建模为稳态过程的过程，如挤压和冷拉。这项研究的最终成果应该是应用于热塑性塑料制造工艺的设计和开发的预测模型。