Micro and Nano Mechanics of Failure Resistant Materials

抗失效材料的微纳米力学

• 批准号: 9223683
• 负责人: Rodney Clifton
• 金额: $ 277.9万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223683&HistoricalAwards=false
• 关键词: Micro; Nano; Mechanics; Failure; Resistant

9223683 Clifton This award is for the renewal of funding for the Materials Research Group at Brown University on the topic of micro- and nano-mechanics of failure resistant materials. The research emphasizes the extension of solid mechanics analysis to smaller length scales. Advances in high-resolution electron microscopy with the development of Computational Fourier Transform method for interpreting atomic-resolution micrographs of regions near atomic lattice defects have been combined with advances in lattice-statics modelling and modelling of the interactions of discrete dislocations to achieve measurements and computations down to nanometer scale. The topics emphasized include optimization of reinforcement size, shape, and distribution in composites; thermal cycling creep of fiber-reinforced composites; frictional resistance to fiber pull-out; void growth by coupled diffusion and deformation; crack tip fields; and deformation patterns and shear band formations. The new research addresses improved failure resistance in two critically important technologies: composites and microelectronics. These applications require a deeper understanding of the basic mechanisms of plastic deformation and fracture on the scale of the microstructure of the material. The research requires expertise in both solid mechanics and materials science and engineering. Students are being trained with skills in these complementary disciplines. *vmpoll device=*wshell device=*vfd device=*parity device=*biosxlat devi9223683 Clifton This award is for the renewal of funding for the Materials Research Group at Brown Univers ity on the topic o 4 ` b 4 ! ! ! D 4 4 ( Times New Roman Symbol & Arial ' " h e e 'Abstract for Clifton MRG at Brown Univ. s s

小行星9223683克利夫顿 该奖项是为布朗大学材料研究小组提供的关于耐失效材料的微观和纳米力学的资助。 该研究强调固体力学分析的扩展到更小的长度尺度。 在高分辨率电子显微镜的发展与计算傅里叶变换方法解释原子晶格缺陷附近区域的原子分辨率显微照片的发展已经结合在晶格静态建模和离散位错的相互作用的建模，以实现测量和计算的进展到纳米尺度。 强调的主题包括优化增强尺寸，形状和分布在复合材料中;纤维增强复合材料的热循环蠕变;纤维拔出的摩擦阻力;耦合扩散和变形的空隙增长;裂纹尖端场;和变形模式和剪切带的形成。 这项新的研究解决了两个至关重要的技术：复合材料和微电子学的耐故障性。 这些应用需要更深入地了解材料微观结构尺度上塑性变形和断裂的基本机制。 该研究需要固体力学和材料科学与工程方面的专业知识。 学生们正在接受这些补充学科的技能培训。 *vmpoll设备=*wshell设备=*vfd设备=* 奇偶校验设备=*biosxlat devi 9223683克利夫顿 这个奖项是为了布朗大学材料研究小组在材料研究方面的资金更新。 4 ` B 4 ! ! ! D 4 4 ( Times New Roman 符号Arial ' " H e e 布朗大学克利夫顿MRG的摘要。 S s