CAREER: Integrated Approach to Modeling, Simulation, and Design for Manufacture of Micro-hot Embossing Using a Polymer Glass Transition Modeling Framework
职业:使用聚合物玻璃化转变建模框架进行微热压花制造的建模、仿真和设计集成方法
基本信息
- 批准号:0747252
- 负责人:
- 金额:$ 40万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2008
- 资助国家:美国
- 起止时间:2008-07-01 至 2015-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The research objective of this Faculty Early Career Development (CAREER) Program project is to develop experimental and numerical tools to optimize the micro-hot embossing process for amorphous polymers. Hot embossing is used to impart micro-scale features to polymer surfaces and is important in the optical, electronics, automotive, and biomedical industries. The research will include an experimental investigation of the effects of surface characteristics in processing, and the results will be used to develop and validate new finite element simulations of hot embossing. Hot embossing is one of many processes that take place near the glass transition temperature. Current experimental data and constitutive models in this temperature range are limited, restricting the design of hot embossing to costly iterative approaches. This research aims to address these needs through material characterization and modeling near the glass transition temperature, process-level finite element modeling, and lab-scale embossing experiments for model validation. The educational objective is to integrate the research into existing engineering courses and to develop outreach methods to promote technical awareness and interest in engineering among 8th grade students.If successful, the results of this research will advance the state of the art in polymer manufacturing by (1) generating new experimental data for polymers near the glass transition, an industrially important temperature range with limited published data; (2) developing a new constitutive model to capture thermoplastic behavior over a wide range of temperatures across the glass transition; (3) providing computational modeling tools for design and optimization of micro-hot embossing; and (4) providing experimental insight into the role of micro-scale surface features in hot embossing. Hot embossing is an environmentally-friendly alternative for creating surface features and the developed design tools will facilitate the push toward nano-scale features. The integration of research and education through this award will provide tangible exposure to cutting-edge research through projects imbedded in undergraduate finite element and graduate polymer processing courses.
该学院早期职业发展(CAREER)计划项目的研究目标是开发实验和数值工具来优化非晶态聚合物的微热压花工艺。 热压花用于赋予聚合物表面微观特征,在光学、电子、汽车和生物医学行业中非常重要。 该研究将包括对加工中表面特性影响的实验研究,其结果将用于开发和验证新的热压花有限元模拟。 热压花是在玻璃化转变温度附近进行的众多工艺之一。目前该温度范围内的实验数据和本构模型有限,将热压花的设计限制为昂贵的迭代方法。 本研究旨在通过玻璃化转变温度附近的材料表征和建模、工艺级有限元建模以及用于模型验证的实验室规模压花实验来满足这些需求。教育目标是将研究整合到现有的工程课程中,并开发推广方法,以提高八年级学生的技术意识和工程兴趣。如果成功,这项研究的结果将通过以下方式推进聚合物制造的最新技术:(1)生成玻璃化转变附近聚合物的新实验数据,玻璃化转变是工业上重要的温度范围,但已发表的数据有限; (2) 开发一种新的本构模型来捕获整个玻璃化转变温度范围内的热塑性行为; (3)为微热压花的设计和优化提供计算建模工具; (4)通过实验深入了解微尺度表面特征在热压花中的作用。 热压花是一种用于创建表面特征的环保替代方案,所开发的设计工具将有助于推动纳米级特征的发展。 通过该奖项将研究和教育融为一体,将通过嵌入本科生有限元和研究生聚合物加工课程中的项目,让人们切实接触到前沿研究。
项目成果
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