MRI: Acquisition of an X-Ray Micro-Computed Tomography System for Evaluating Crack Evolution and Failure Characterization of Engineering Materials

MRI：获取 X 射线微计算机断层扫描系统，用于评估工程材料的裂纹演化和失效特征

基本信息

批准号：
0721625
负责人：
Jie Shen
金额：
$ 30万
依托单位：
Regents of the University of Michigan - Ann Arbor
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-09-01 至 2009-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0721625&HistoricalAwards=false
关键词：
MRI Acquisition Ray Micro Computed

项目摘要

The objective of this Major Research Instrumentation (MRI) is to develop the acquisition of a high-energy and high-resolution X-ray tomography system for the nondestructive microstructural evaluation of crack propagation and failure of engineering materials at the University of Michigan, Dearborn (UM-D). The requested system will form a fundamental infrastructure to support ongoing multidisciplinary manufacturing-related research activities, including accurate measurement of crack initiation and propagation, quality inspection or damage assessment of engineering structures, failure mechanisms related to crack growth, continuum damage mechanisms related to micro and mesoscale damage evolution, fatigue damage, and formability of engineering materials used in the automotive industry. The main objectives of these studies are to develop a nondestructive methodology capable of accurately determining the micro-structural damage evolution and/or failure mechanisms of engineering materials, to provide a critical linkage between micro/meso and macroscale damage mechanisms, and to develop innovative algorithms for damage assessment of engineering structures through the proposed measurement system. The outcome of the ongoing research activities will lead to: 1) a potential breakthrough in understanding the damage evolution through failure process of engineering materials by measuring and analyzing spatial micro/mesoscale crack growth in complete and continuous loading processes without the need to unload and dissect material specimens; 2) possible coalesce of micro/mesoscale crack growth patterns and damage mechanics; and 3) an accurate way for the damage assessment and residual life prediction of engineering structures under service conditions through spatial fracture crack signatures. The proposed nondestructive measurement system will substantially strengthen the research infrastructure at UM-D and will also significantly improve the education quality at UM-D through undergraduate student design projects and research training. The community outreaching will inspire high-school students' interest in science and engineering, and broaden the participation of underrepresented black minority and female students in Dearborn and Detroit communities.

这项主要研究仪器（MRI）的目的是开发获得高能和高分辨率X射线断层扫描系统，用于对密歇根大学（UM-D）的工程材料的裂纹传播和工程材料失败的无损微结构评估（UM-D）。 The requested system will form a fundamental infrastructure to support ongoing multidisciplinary manufacturing-related research activities, including accurate measurement of crack initiation and propagation, quality inspection or damage assessment of engineering structures, failure mechanisms related to crack growth, continuum damage mechanisms related to micro and mesoscale damage evolution, fatigue damage, and formability of engineering materials used in the automotive industry.这些研究的主要目的是开发一种能够准确确定工程材料的微结构损伤演化和/或失败机制的无损方法，以通过拟议的测量系统进行工程损害评估结构的创新算法，从而提供微观/中级和麦克比损害损害机制之间的关键联系，并开发创新的算法。正在进行的研究活动的结果将导致：1）通过测量和分析空间微型/中尺度裂纹在完整且连续的负载过程中，不需要卸载和解剖材料样品，可以通过测量和分析空间微/中尺度裂纹的生长来理解工程材料的破坏进化的潜在突破； 2）微/介质裂纹生长模式和损害力学的可能结合； 3）通过空间断裂裂纹签名在服务条件下对工程结构进行损害评估和剩余寿命预测的准确方法。拟议的非破坏性测量系统将大大加强UM-D的研究基础设施，并且还将通过本科生设计项目和研究培训显着提高UM-D的教育质量。社区的推广将激发高中生对科学和工程学的兴趣，并扩大了代表性不足的黑人少数民族和女学生在迪尔伯恩和底特律社区的参与。