Plasticity and Fracture

塑性与断裂

• 批准号: 8714665
• 负责人: Rodney Clifton
• 金额: $ 260.7万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8714665&HistoricalAwards=false
• 关键词: Plasticity; Fracture

Through this research we seek a fundamental understanding of the mechanical behavior of materials of scientific and engineering interest. The objective underlying the work is a complete characterization of the resistance of material to deformation and fracture. Research in this area is necessarily interdisciplinary with activities that span the spectrum from basic theory, through experiment and observation, to detailed modelling and simulation. Theoretical studies provide the framework for discussing phenomena and for postulating physical mechanisms of materials deformation and fracture as well as provide definitions of physical quantities that should be measured. Experimental studies, on the other hand, provide the means of identifying complex material phenomenology and provide quantitative information on the physical quantities identified in theoretical work. To complete the loop, analytical modelling and computer simulation provide the means to examine the validity of theoretical concepts and to draw conclusions about the behavior of materials that could not be inferred directly from experimental data. It is essential that each of these ingredients be included in a comprehensive research program if significant fundamental contributions are to be made. Major themes of this research include: (1) the effects of rate and temperature on inelastic deformation mechanisms and fracture behavior; (2) the establishment of quantitative links between microscopic microstructural mechanisms and macroscopic behavior; (3) exploration of the role of interfaces on the mechanisms of deformation and fracture; and (4) the study of unstable and localized deformation, especially as a direct precursor to failure.

通过这项研究，我们寻求一个基本的理解， 科学与工程材料力学性能 兴趣 这项工作的目标是一个完整的 表征材料的抗变形能力， 骨折这一领域的研究必然是跨学科的 从基础理论到 从实验和观察到详细的建模和模拟。 理论研究为讨论提供了框架 现象和假设材料的物理机制 变形和断裂，并提供 应该测量的物理量。 实验 另一方面，研究提供了识别 复杂的材料现象学，并提供定量 理论上确定的物理量的信息 工作 为了完成循环，分析建模和计算机 模拟提供了检验 理论概念，并得出有关行为的结论 无法直接从 实验数据 至关重要的是， 成分被纳入一个全面的研究计划，如果 将作出重大的根本性贡献。 本研究的主要主题包括：（1）利率的影响 和温度对非弹性变形机制和断裂的影响 行为;（2）建立定量联系 微观组织机制和宏观行为; (3)探讨界面在生物医学中的作用 变形与断裂的研究;（4）非稳定和 局部变形，尤其是作为 失败