GOALI: Multi-Scale Deformation and Failure Modeling of Magnesium Alloys for Impact Analysis and Forming Process Simulations

GOALI：镁合金的多尺度变形和失效建模，用于冲击分析和成形过程模拟

• 批准号: 1100818
• 负责人: Somnath Ghosh
• 金额: $ 32万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100818&HistoricalAwards=false
• 关键词: GOALI; Multi; Scale; Deformation; Failure

The objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) project, in collaboration with General Motors (GM) R&D Center, will develop a novel system of experimentally validated, physics-based multi-level computational models for simulating multi-scale deformation and predicting ductile failure in Magnesium alloys. Simulations will focus on high strain rate impact loading and forming processes. The multi-scale model will develop modules at three relevant scales, viz. (i) macroscopic scale of structural components, (ii) microscopic scale of individual grains and polycrystalline aggregates, and (iii) atomic scales of crystal lattices for postulating crack evolution. Both homogenization and localization strategies will be incorporated in a hierarchical-concurrent framework. Specific developmental modules include: (i) image-based three-dimensional microstructure generation of polycrystalline aggregates, (ii) image-based crystal-plasticity FEM modeling of microstructural deformation and failure, (iii) homogenized continuum plasticity-damage laws for incorporation in macroscopic models, and (iv) macroscopic simulations. GM will be responsible for experiments at different scales to validate and calibrate the computational models. The program will provide an unprecedented understanding of the role of microstructure on deformation and failure characteristics in Magnesium alloys. Magnesium alloys have a huge potential for enhancing fuel efficiency and energy economization in the automotive industry, which will be facilitated. The program will aid the materials industry, where materials development is stymied by not knowing how variabilities at different scales affect performance and processing. Graduate students will have a strong interaction with eminent industrial researchers. The program will educate next generation of engineers on the challenges of emerging technologies, with a unique academia-industry perspective.

与通用电机（GM）研发中心合作，该学术联络的赠款机会的目的将开发出一种新型的经过实验验证的基于物理的多级计算模型，以模拟多尺度变形并预测镁合金的延性衰竭。模拟将集中于高应变率影响负载和形成过程。多尺度模型将在三个相关尺度上开发模块，即。 （i）结构成分的宏观尺度，（ii）单个晶粒和多晶骨料的微观尺度，以及（iii）晶格的原子尺度，用于假设裂纹的演化。同质化和本地化策略都将纳入层次固定框架中。特定的发育模块包括：（i）基于图像的三维微观结构生成多晶骨料，（ii）基于图像的基于图像的晶体 - 塑性fem微结构变形和失败的模型，（iii）同质化的连续性塑性损伤法，以在宏观型型中掺入宏观型塑性。模型和（IV）宏观模拟。 GM将负责在不同尺度上进行实验，以验证和校准计算模型。该程序将对微观结构在镁合金中的变形和故障特性中的作用提供前所未有的理解。镁合金具有巨大的潜力，可以提高汽车行业的燃油效率和能源节能，这将得到促进。该计划将有助于材料行业，在材料行业中，材料开发受到阻碍，因为不知道不同尺度的变异性如何影响性能和处理。研究生将与著名的工业研究人员进行牢固的互动。该计划将教育下一代工程师有关新兴技术的挑战，并具有独特的学术界观点。