Micro and Nano Mechanics of Failure Resistant Materials

9223683克利夫顿这个奖项是为了表彰布朗大学材料研究小组关于耐失效材料的微观和纳米力学主题的续期资助。研究强调将固体力学分析扩展到较小的长度尺度。随着用于解释原子晶格缺陷附近区域的原子分辨显微图像的计算傅里叶变换方法的发展，高分辨率电子显微镜的进展与晶格静力学建模和离散位错相互作用的建模的进展相结合，以实现纳米级的测量和计算。重点讨论了复合材料中增强体尺寸、形状和分布的优化；纤维增强复合材料的热循环蠕变；纤维拔出的摩擦阻力；通过扩散和变形耦合的孔洞增长；裂纹尖端场；以及变形模式和剪切带的形成。这项新的研究致力于在两项至关重要的技术--复合材料和微电子技术--方面提高抗故障能力。这些应用需要更深入地了解材料微观结构尺度上的塑性变形和断裂的基本机制。这项研究需要固体力学、材料科学和工程学方面的专业知识。学生们正在接受这些互补学科的技能培训。*vmpolDevice=*wShell Device=*vfd Device=*Parity Device=*biosxlat desider9223683 Clifton本奖项是为布朗大学材料研究小组提供的关于主题o 4的续期资金`b4！！！D 4 4(布朗大学克里夫顿MRG的泰晤士报新罗马符号和Arial‘He e’摘要)S S

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