CDS&E: Corrosion-induced Damage and Fracture: Pushing Micro-Scale Simulations to the Macro-Scale, in Both Space and Time

CDS

• 批准号: 1953346
• 负责人: Florin Bobaru
• 金额: $ 74.84万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1953346&HistoricalAwards=false
• 关键词: CDS& Corrosion; induced; Damage; Fracture

Corrosion can be a precursor to fracture and catastrophic failure in structures and systems in all aspects of life. Understanding how corrosion-induced changes in material properties at the small scale lead to fracture and damage at a much larger scale can reduce costs to the broader economy by tens of billions of dollars each year. It can also prevent loss of life from catastrophic failure of man-made systems. The knowledge gained from this project will improve safety and resilience in a broad array of material systems—ranging from transportation to infrastructure and medicine. The project will train graduate, undergraduate, and middle and high school students and will produce a handbook on modeling of material degradation and failure. The knowledge gained from the research will be broadly disseminated through an open-source computational platform, a simulation app, and by organizing conference symposia.This award will create a new class of highly efficient nonlocal solvers allowing unprecedented access to multiple spatial and temporal scales in simulation of material degradation and failure caused by dissolution-type phenomena-- pushing the currently reachable space and time-scales of computational models from micrometers and minutes, to meters and years. This project creates efficient solvers to perform massively-parallel, large-scale simulations capable of linking the disparate spatial and temporal scales relevant in these problems. Specifically, novel boundary-adapted spectral methods for peridynamic models of diffusion, deformation, corrosion damage and fracture will exploit the convolution structure of nonlocal operators to solve transient problems with billions of degrees of freedom efficiently. The researchers will also perform numerical analysis and error estimation for the new methods. A coupled mechano-chemical spectral method for peridynamics will enable simulation of corrosion-induced failure in materials at the structure-level while accounting for micro-scale effects, thereby spanning length-scales and time scales previously unreachable.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

腐蚀可能是生活在生活的各个方面的结构和系统中断裂和灾难性失败的先驱。了解腐蚀引起的小规模材料特性的变化如何导致骨折和损坏在更大范围内会降低更广泛的经济成本，每年增加数百亿美元的成本。它还可以防止人造系统的灾难性失败导致生命损失。从该项目中获得的知识将提高各种物质系统的安全性和弹性，从运输到基础设施和医学。该项目将培训毕业生，本科，中学和高中生，并制作一本关于材料降解和失败的模型的手册。从研究中获得的知识将通过开源计算平台，模拟应用程序进行广泛分解，并通过组织会议研讨会。该奖项将创建一类新的高效非局部求解器的新类别，使得前所未有的空间和临时量表允许在材料定义和实时范围中造成的材料定义和临时范围的临时范围，并允许临时范围造成的时间范围，并允许静态范围造成的时间范围，并允许静态范围的范围降低，并允许静态范围的范围降低，并允许定期及时范围的时间范围，并允许定期及时范围的时间范围，并允许静态范围的范围 - 允许静态范围的范围 - 分钟，到米和几年。该项目创建了有效的求解器，以执行大规模平行的大规模模拟，能够链接在这些问题中相关的不同空间和临时量表。具体而言，用于扩散，变形，腐蚀损伤和断裂的新型边界适应光谱方法将探索非本地算子的卷积结构，以解决有效的数十亿自由度的瞬态问题。研究人员还将对新方法执行数值分析和误差估计。一种用于植物动力学的机械化学光谱方法将模拟结构水平的腐蚀诱导的材料的失败，同时考虑微尺度效应，从而跨越了长度尺度和以前无法实现的时间尺度。该奖项通过评估NSF的诚实而构成了诚实的构成群体的构成，该奖项反映了诚实的构成群体的构成群体的构成群体的构成群体和奠定型的依据。

项目成果

Dynamically learning the parameters of a chaotic system using partial observations

使用部分观测动态学习混沌系统的参数

• DOI: 10.3934/dcds.2022033
• 发表时间: 2022
• 期刊: Discrete and Continuous Dynamical Systems
• 影响因子: 1.1
• 作者: Carlson, Elizabeth;Hudson, Joshua;Larios, Adam;Martinez, Vincent R.;Ng, Eunice;Whitehead, Jared P.
• 通讯作者: Whitehead, Jared P.

Sensitivity Analysis for the 2D Navier–Stokes Equations with Applications to Continuous Data Assimilation

• DOI: 10.1007/s00332-021-09739-9
• 发表时间: 2020-07
• 期刊: Journal of Nonlinear Science
• 影响因子: 3
• 作者: Elizabeth Carlson;Adam Larios

Connections Between the Meshfree Peridynamics Discretization and Graph Laplacian for Transient Diffusion Problems

• DOI: 10.1007/s42102-021-00053-2
• 发表时间: 2021-03
• 期刊: Journal of Peridynamics and Nonlocal Modeling
• 作者: Longzhen Wang;F. Bobaru

Analytical solutions of peridynamic equations. Part II: Elastic wave propagation

近场动力学方程的解析解。

• DOI: 10.1016/j.ijengsci.2023.103866
• 发表时间: 2023
• 期刊: International Journal of Engineering Science
• 影响因子: 6.6
• 作者: Chen, Ziguang;Peng, Xuhao;Jafarzadeh, Siavash;Bobaru, Florin
• 通讯作者: Bobaru, Florin

A peridynamic model for galvanic corrosion and fracture

• DOI: 10.1016/j.electacta.2021.138968
• 发表时间: 2021-09
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: Jiangming Zhao;S. Jafarzadeh;M. Rahmani;Ziguang Chen;Yong-Rak Kim;F. Bobaru