CAREER: Understanding Grain Level Residual Stresses Through Concurrent Modeling and Experiments

职业：通过并行建模和实验了解晶粒级残余应力

• 批准号: 1651956
• 负责人: Michael Sangid
• 金额: $ 50万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651956&HistoricalAwards=false
• 关键词: CAREER; Understanding; Grain; Level; Residual

Polycrystalline materials such as metals, alloys and ceramics dominate the infrastructure of modern society in terms of both tons of raw material usage and in the breadth of applications, which span energy, transportation, defense, and other sectors. Stresses introduced during the processing of these materials, known as residual stresses, are ubiquitous in all materials and can have tremendous effects on performance. Despite their presence and critical role in component life, many analysis efforts cannot account for residual stresses. This Faculty Early Career Development (CAREER) award supports the method development to characterize residual stresses at the micron level within polycrystalline materials. The research will lead to the development of a computational framework to account for residual stresses, and faithfully predict their distributions. The research leverages recent advances in High Energy Diffraction Microscopy through collaboration with the Advanced Photon Source (APS) at Argonne National Laboratory. This award also supports an innovative educational program that is twofold. First, a series of continuing education courses will be developed focusing on the treatment of residual stress analyses produced in this research, specifically targeted towards the design systems, structural analysis, and manufacturing communities (i.e. non-materials) across professional societies. Second, hands-on learning activities will be introduced within Purdue's Space Day, an existing grade-school outreach program, which will focus on residual stresses in aerospace materials.In order to establish a basic understanding of residual stresses, the research team will: (i) develop a modeling framework to initialize and evolve residual stresses based on a backstress formulation present on individual slip systems, (ii) measure residual stresses and their development at the grain and sub-grain length scales within polycrystalline aggregates via high energy x-ray diffraction microscopy, (iii) develop techniques to map dislocation arrangements within the bulk of structural alloys, and (iv) produce validation datasets for crystal plasticity models containing state dependent variables that were previously impossible to measure. The work is predicated on a synergy between state-of-the-art experiments and simulations at the same length scale. The results will unequivocally elucidate the role of residual stresses across length scales in polycrystalline materials, in order to develop more accurate lifetime predictions of the alloys and fabricate tailored components that offer either minimal or beneficial residual stresses and therefore are more resistant to failures.

多晶材料（例如金属，合金和陶瓷）在现代社会的基础设施中都以原材料的使用以及涵盖能源，运输，防御和其他部门的应用的广度来统治现代社会的基础设施。 在这些材料加工过程中引入的应力（称为残余应力）在所有材料中无处不在，并且对性能产生巨大影响。 尽管它们在组成寿命中的存在和关键作用，但许多分析工作仍无法解释残余压力。 该教师早期职业发展（职业）奖支持方法开发，以表征多晶材料中微米层的残余压力。这项研究将导致开发计算框架以说明残余压力，并忠实地预测其分布。 该研究通过与Argonne National Laboratory的高级光子源（APS）合作，利用了高能衍射显微镜的最新进展。该奖项还支持一个具有双重创新的教育计划。 首先，将开发一系列的继续教育课程，重点介绍本研究中产生的残余压力分析的治疗，专门针对跨专业社会的设计系统，结构分析和制造社区（即非物质）。 其次，动手学习活动将在普渡（Purdue）的太空日（一个现有的年级外展计划）中引入，该计划将重点介绍航空航天材料中的残留压力。在为了建立对残余压力的基本理解中，研究团队将开发一个建模框架：（i）基于差异的压力，以差距为基础的差异，并在差异中逐渐衡量差异（ii），并在差异上进化，并在差异上估计（II）（ii）的序列（II），II）（ii）的序列（ii），ii）的序列（II），ii）的压力（II），以及II），II）的压力（II），II）的压力（ii）的压力（II）。多晶通过高能X射线衍射显微镜（III）开发了大部分结构合金中绘制错位排列的技术，并且（iv）生成了包含晶体可塑性模型的验证数据集，其中包含以前无法测量的状态相关变量。这项工作是基于最先进的实验与模拟之间的协同作用。 结果将明确阐明多晶材料中长度尺度上的残余应力的作用，以便为合金提供更准确的终身预测，并制造量身定制的组件，这些组件具有最小或有益的残留应力，因此对失败具有更大的抵抗力。

项目成果

Residual elastic strain and survivability of stabilized zirconia coated carbon-carbon (C/C) composite

• DOI: 10.1016/j.surfcoat.2023.129811
• 发表时间: 2023-07
• 期刊: Surface and Coatings Technology
• 影响因子: 5.4
• 作者: J. I. Ferguson;Abdullah Al Saad;M. H. Şeren;J. P. Ko;K. Nygren;R. Trice;M. Sangid

Integrating Materials Model-Based Definitions into Design, Manufacturing, and Sustainment: A Digital Twin Demonstration of Incorporating Residual Stresses in the Lifecycle Analysis of a Turbine Disk

将基于材料模型的定义集成到设计、制造和维护中：将残余应力纳入涡轮盘生命周期分析的数字孪生演示

• DOI: 10.1115/1.4048426
• 发表时间: 2021
• 期刊: Journal of computing and information science in engineering
• 影响因子: 3.1
• 作者: Gopalakrishnan, S.;Hartman, N.W.;Sangid, M.D.
• 通讯作者: Sangid, M.D.

Comparative assessment of backstress models using high-energy X-ray diffraction microscopy experiments and crystal plasticity finite element simulations

• DOI: 10.1016/j.ijplas.2020.102887
• 发表时间: 2021
• 期刊: International Journal of Plasticity
• 影响因子: 9.8
• 作者: R. Bandyopadhyay;Sven E. Gustafson;K. Kapoor;Diwakar Naragani;D. Pagan;M. Sangid

Revealing 3D intragranular micromechanical fields at triple junctions

• DOI: 10.1016/j.actamat.2023.119300
• 发表时间: 2023-08
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Sven E. Gustafson;W. Ludwig;Raquel Rodríguez-Lamas;C. Yildirim;K. Shanks;C. Detlefs;M. Sangid

A framework to enable microstructure-sensitive location-specific fatigue life analysis of components and connectivity to the product lifecycle

一个框架，可对组件进行微观结构敏感的特定位置疲劳寿命分析以及与产品生命周期的连接

• DOI: 10.1016/j.ijfatigue.2022.107211
• 发表时间: 2022
• 期刊: International Journal of Fatigue
• 影响因子: 6
• 作者: Gopalakrishnan, Saikiran;Bandyopadhyay, Ritwik;Sangid, Michael D.
• 通讯作者: Sangid, Michael D.