USA-Tunisia-France Cooperation for Next Generation Material Model Development

美国-突尼斯-法国合作开发下一代材料模型

• 批准号: 0929362
• 负责人: Tasnim Hassan
• 金额: $ 0.5万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0929362&HistoricalAwards=false
• 关键词: USA; Tunisia; France; Cooperation; Next

This proposed planning visit is to further develop research collaboration between Dr. Tasmin Hassan from North Carolina State University, Dr. Prof. Kacem Sai from Ecole Nationale d'Ingénieurs de Sfax (ENIS) in Tunisia, and Dr. George Cailletaudat from the Ecole de Mines des Paris (PariTech) in France on the topic of next generation material models. The anticipated outcomes of the planning visit are future collaborative research proposals on this topic. Operating loads, pressure and temperature levels of chemical and power generation plants are gradually increasing in order to achieve higher efficiency and to enhance sustainability, thereby reducing environmental impact. Modern alloys and steels are being developed by material scientists to sustain this extreme load environment. However, many low cycle fatigue (LCF) failure phenomena (e.g., influence of dynamic strain aging on LCF life at various load rates and temperatures) demonstrated by these materials cannot be simulated using existing material models. Hence, use of new materials in structures and machines requires a new material model for design and analysis. It is anticipated that the desired material model improvement can be achieved by overcoming deficiencies of the material models developed by Hassan, Sai and Cailletaud and incorporating modeling features such as grain size and boundary, dislocation type and density.Using the proposed travel grant, Hassan and a graduate student from North Carolina State University will visit Sai's research group in Tunisia and Cailletaud's research group in France. This trilateral cooperation provides the US scientific community with access to facilities and expertise that will enhance research efforts currently underway at North Carolina State University.

此次计划中的访问是为了进一步发展北卡罗来纳州立大学的Tasmin Hassan博士、突尼斯斯法克斯国家电子通讯学院（ENIS）的Kacem Sai教授博士和法国巴黎矿业学院（PariTech）的George Cailletaudat博士在下一代材料模型方面的研究合作。计划访问的预期成果是关于该主题的未来合作研究建议。为了实现更高的效率和增强可持续性，从而减少对环境的影响，化学发电厂和发电厂的运行负荷、压力和温度水平正在逐渐增加。材料科学家正在开发现代合金和钢材，以承受这种极端的负载环境。然而，这些材料所证明的许多低周疲劳（LCF）失效现象（例如，动态应变老化对不同载荷速率和温度下LCF寿命的影响）无法使用现有的材料模型进行模拟。因此，在结构和机器中使用新材料需要一种新的材料模型进行设计和分析。预计通过克服Hassan、Sai和Cailletaud等人开发的材料模型的不足，并结合晶粒尺寸和边界、位错类型和密度等建模特征，可以实现理想的材料模型改进。利用拟议的旅行补助金，哈桑和北卡罗来纳州立大学的一名研究生将访问赛在突尼斯的研究小组和卡耶莱托在法国的研究小组。这种三边合作为美国科学界提供了设施和专业知识，将加强北卡罗来纳州立大学目前正在进行的研究工作。