Atomistic Simulation Based Crack Evolution Models for Crystal Plasticity FEM of Crystalline Metals

基于原子模拟的晶体金属晶体塑性有限元裂纹演化模型

基本信息

  • 批准号:
    1200231
  • 负责人:
  • 金额:
    $ 30.2万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2012
  • 资助国家:
    美国
  • 起止时间:
    2012-09-01 至 2016-08-31
  • 项目状态:
    已结题

项目摘要

The research objective of this grant is the development of physics-based crack evolution models in polycrystalline metallic materials for use in crystal plasticity finite element models. The unified deformation-fracture models will be developed by upscaling variables from atomic-scale, molecular dynamics simulations with explicit depiction of the atomic structure and deformation mechanisms. Upscaling will provide a framework for cohesive laws and associated evolution laws for deformation variables along specific slip systems. A systematic approach will be undertaken, encompassing the following tasks: (i) molecular dynamics (MD) simulations of 3D crystalline lattice systems to simulate the evolution of ductile and brittle crack evolution under a variety of force fields, (ii) development of accelerated MD methods to simulate longer time scales consistent with experiments, (iii) characterization and identification of crack tip deformation mechanisms, followed by quantification of the local atomic structure and evolution, and (iv) development of energy-based laws governing crack growth in the process zone by partitioning the total energy corresponding to different physical mechanisms.Benefits to the scientific community will be accomplished through the establishment of novel crack evolution models of critical importance in analysis and design of materials for better fracture toughness and ductility. Advancement in accelerated molecular dynamics modeling will allow modeling at strain rates of realistic experiments. Collaboration with Sandia and Brown Deer Technology will enable technology transfer of deliverables for broader utilization. Students will have strong interactions with eminent researchers at Sandia National Laboratories and a small-scale development company to see the direct impact of their work.
该基金的研究目标是开发多晶金属材料中基于物理的裂纹演化模型,用于晶体塑性有限元模型。 统一的变形断裂模型将开发升级变量从原子尺度,分子动力学模拟与原子结构和变形机制的明确描述。 尺度放大将提供一个框架的凝聚力的法律和相关的演变规律的变形变量沿着特定的滑移系统。 将采取系统的办法,包括以下任务:(i)三维晶格系统的分子动力学(MD)模拟,以模拟在各种力场下的韧性和脆性裂纹演化的演化,(ii)加速MD方法的开发,以模拟与实验一致的较长时间尺度,(iii)裂纹尖端变形机制的表征和识别,接着是局部原子结构和演化的量化,及(iv)发展能源-通过划分与不同物理机制相对应的总能量来控制过程区中裂纹扩展的基本规律。通过建立新的裂纹演化模型,更好的断裂韧性和延展性。 在加速分子动力学建模的进步将允许建模在应变率的现实实验。 与Sandia和Brown Deer Technology的合作将使可交付成果的技术转让得到更广泛的利用。 学生将与桑迪亚国家实验室和一家小型开发公司的杰出研究人员进行强有力的互动,以了解他们工作的直接影响。

项目成果

期刊论文数量(0)
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Somnath Ghosh其他文献

Correlation between electrical transport, microstructure and room temperature ferromagnetism in 200 keV Ni2+ ion implanted zinc oxide (ZnO) thin films
200 keV Ni2 离子注入氧化锌 (ZnO) 薄膜中电输运、微观结构和室温铁磁性之间的相关性
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    B. Joshi;Somnath Ghosh;P. Srivastava;Pradeep Kumar;D. Kanjilal
  • 通讯作者:
    D. Kanjilal
Machine learning-enabled self-consistent parametrically-upscaled crystal plasticity model for Ni-based superalloys
基于机器学习的镍基高温合金自洽参数放大晶体塑性模型
A STUDY OF SERUM URIC ACID LEVELAND RISK FOR ACUTE ISCHEMIC NONEMBOLIC STROKE IN ELDERLY SUBJECTS
老年受试者急性缺血性非栓塞性中风的血清尿酸水平风险研究
  • DOI:
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Somnath Ghosh;A. B. Pramanik;Shampa Maity;Pulakesh Sinha Dr;D. Jana
  • 通讯作者:
    D. Jana
Extending the collaboration boundary in localized threshold cryptography-based schemes for MANETs
扩展 MANET 本地化基于阈值加密方案的协作边界
PMMC cluster analysis
PMMC聚类分析
  • DOI:
    10.3970/cmes.2004.005.171
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    S. Yotte;J. Riss;D. Breysse;Somnath Ghosh
  • 通讯作者:
    Somnath Ghosh

Somnath Ghosh的其他文献

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{{ truncateString('Somnath Ghosh', 18)}}的其他基金

Multi-Scale Modeling and Multi-Objective Design Framework for Location-Specific Material Behavior in Additively Manufactured Components
增材制造组件中特定位置材料行为的多尺度建模和多目标设计框架
  • 批准号:
    1825115
  • 财政年份:
    2018
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
IUTAM Symposium on Integrated Computational Structure-Material Modeling of Deformation and Failure under Extreme Conditions; Baltimore, Maryland; June 10-22, 2016
IUTAM 极端条件下变形和失效综合计算结构-材料建模研讨会;
  • 批准号:
    1619978
  • 财政年份:
    2016
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
Integrated Experimental- Computational Modeling of Deformation and Fatigue in Advanced Structural Materials
先进结构材料变形和疲劳的综合实验计算模型
  • 批准号:
    1136219
  • 财政年份:
    2011
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
Collaborative Proposal: Integrated Computational System for Probability Based Multi-Scale Model (PMM) of Ductile Fracture in Lightweight Alloys
合作提案:轻质合金延性断裂概率型多尺度模型(PMM)集成计算系统
  • 批准号:
    1136349
  • 财政年份:
    2011
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
Workshops: Multiscale Modeling for Multifunctional Analysis and Design (MMMAD) and Challenges in Computational Multiscale Materials Modeling (CCMMM); Arlington, VA; 2-5 May 2011
研讨会:多功能分析与设计的多尺度建模(MMMAD)和计算多尺度材料建模的挑战(CCMMM);
  • 批准号:
    1132177
  • 财政年份:
    2011
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
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
  • 财政年份:
    2011
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
10th US National Congress of Computational Mechanics Travel Grant (Division OD/OCI, PM: A. Patra)
第十届美国全国计算力学大会差旅补助金(OD/OCI 部门,PM:A. Patra)
  • 批准号:
    0852895
  • 财政年份:
    2009
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
Integrated Experimental- Computational Modeling of Deformation and Fatigue in Advanced Structural Materials
先进结构材料变形和疲劳的综合实验计算模型
  • 批准号:
    0800587
  • 财政年份:
    2008
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
Collaborative Proposal: Integrated Computational System for Probability Based Multi-Scale Model (PMM) of Ductile Fracture in Lightweight Alloys
合作提案:轻质合金延性断裂概率型多尺度模型(PMM)集成计算系统
  • 批准号:
    0728203
  • 财政年份:
    2007
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant
NUMIFORM 2004, 8th International Conference on Numerical Methods in Industrial Forming Processess; Columbus, Ohio; June 13-17, 2004
NUMIFORM 2004,第八届工业成形过程数值方法国际会议;
  • 批准号:
    0354514
  • 财政年份:
    2004
  • 资助金额:
    $ 30.2万
  • 项目类别:
    Standard Grant

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