Indentation-Induced Damage Initiation and Evolution in Single- and Poly-Crystalline Ceramics

单晶和多晶陶瓷中压痕诱发的损伤萌生和演变

基本信息

  • 批准号:
    0926798
  • 负责人:
  • 金额:
    $ 31.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-10-01 至 2014-09-30
  • 项目状态:
    已结题

项目摘要

A joint experimental and modeling effort is proposed to study the initiation and growth of crack and the interplay between fracture and plasticity in single- and poly-crystalline ceramics. First, the validity of indentation-cracking method for toughness measurement will be examined, and a parametric map will be constructed to delineate the dependence of the ratio of crack size and contact radius on indenter geometry, applied load, toughness, and hardness. Second, by experimentally examining the behavior of several SiC materials during load and depth sensing spherical indentation tests and comparing it to microstructurally based finite element simulations based on crystal plasticity with coupled intergranular and transgranular microfracture using a cohesive zone approach, a detailed picture of the coupled deformation and micro-fracture processes will be developed from which it will be possible to make predictions about how to tailor a microstructure to optimize its energy absorption. The ability to quantitatively predict the initiation and propagation of fracture and the interaction between fracture and plasticity is a critical step towards a mechanistic understanding of deformation and failure properties, as well as ductility and toughness enhancement methods, of ceramic single crystals and polycrystals. The proposed work will provide an excellent opportunity for the graduate and undergraduate students to participate in an experimental/modeling synergistic research that includes micromechanics modeling and computation, and advanced mechanical testing and microstructural characterization. New educational materials will be developed and disseminated through two graduate level classes. The PIs will participate in the existing programs at their institute (supported by NSF and Department of Energy) for education/outreach activities, which are designed to inspire interests of high school and college students in science and engineering careers, as well as for recruiting students from underrepresented groups.
提出了一个联合实验和模拟的努力,研究裂纹的萌生和扩展和断裂和塑性之间的相互作用,在单晶和多晶陶瓷。首先,将检查的有效性的压痕开裂方法的韧性测量,并将构建一个参数图来描绘的比率的裂纹尺寸和接触半径压头的几何形状,施加的载荷,韧性和硬度的依赖。第二,通过实验性地检查几种SiC材料在负载和深度感测球形压痕测试期间的行为,并将其与基于晶体塑性的基于微观结构的有限元模拟进行比较,所述晶体塑性具有使用内聚区方法的耦合的沿晶和穿晶微断裂,耦合变形和微观的详细图片,将开发断裂过程,由此将有可能预测如何定制微结构以优化其能量吸收。定量预测断裂的起始和扩展以及断裂与塑性之间的相互作用的能力是对陶瓷单晶和多晶的变形和失效特性以及延展性和韧性增强方法的机械理解的关键一步。拟议的工作将提供一个很好的机会,研究生和本科生参加实验/建模协同研究,包括微观力学建模和计算,先进的机械测试和微观结构表征。将通过两个研究生班编写和分发新的教育材料。PI将参与其研究所现有的教育/推广活动计划(由NSF和能源部支持),旨在激发高中和大学生对科学和工程职业的兴趣,以及从代表性不足的群体中招募学生。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
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Yanfei Gao其他文献

A mechanistic interpretation of Nelson curves for PVP failures under high temperature hydrogen attack
高温氢攻击下 PVP 失效尼尔森曲线的机理解释
  • DOI:
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Dong Han;Yanfei Gao;Phillip E. Loya;Michael Swindeman;Jorge Penso;Zhili Feng
  • 通讯作者:
    Zhili Feng
Effects of Glass-Forming Metallic Film on the Fatigue Behavior of C-2000 Ni-Based Alloy
玻璃形成金属膜对C-2000镍基合金疲劳行为的影响
  • DOI:
    10.1557/proc-0903-z14-13
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    F. X. liu;C. Chiang;J. Chu;Yanfei Gao;P. Liaw
  • 通讯作者:
    P. Liaw
Strengthening in Al-, Mo- or Ti-Doped CoCrFeNi High Entropy Alloys: a Parallel Comparison
  • DOI:
    https://doi.org/10.1016/j.actamat.2019.12.038
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
  • 作者:
    Xi Li;Zhongtao Li;Zhenggang Wu;Shijun Zhao;Weidong Zhang;Hongbin Bei;Yanfei Gao
  • 通讯作者:
    Yanfei Gao
Lycopene protects against LPS-induced proinflammatory cytokine cascade in HUVECs.
番茄红素可防止 HUVEC 中 LPS 诱导的促炎细胞因子级联反应。
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yunhui Wang;Yanfei Gao;Wentao Yu;Zhie Jiang;J. Qu;Kunxia Li
  • 通讯作者:
    Kunxia Li
Self-adhesive polyethersulfone polyurethane carbon nanotubes fiber reinforced aerogel and its application in oil-water separation
自粘聚醚砜聚氨酯碳纳米管纤维增强气凝胶及其在油水分离中的应用
  • DOI:
    10.1016/j.molstruc.2025.141682
  • 发表时间:
    2025-06-15
  • 期刊:
  • 影响因子:
    4.700
  • 作者:
    Yanfei Gao;Yin Zhang;Yuqing Zhang;Kun Qi;Yuman Zhou;Jinfa Ming
  • 通讯作者:
    Jinfa Ming

Yanfei Gao的其他文献

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{{ truncateString('Yanfei Gao', 18)}}的其他基金

IUCRC Phase III University of Tennessee, Knoxville (UTK): Manufacturing and Materials Joining Innovation Center (Ma2JIC)
IUCRC 第三期田纳西大学诺克斯维尔分校 (UTK):制造和材料连接创新中心 (Ma2JIC)
  • 批准号:
    2052729
  • 财政年份:
    2021
  • 资助金额:
    $ 31.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: In situ Diffraction and Cohesive-Zone Studies of the Fatigue-Crack-Growth Behavior in Mg Alloys
合作研究:镁合金疲劳裂纹扩展行为的原位衍射和内聚区研究
  • 批准号:
    1809640
  • 财政年份:
    2018
  • 资助金额:
    $ 31.5万
  • 项目类别:
    Standard Grant
Strain-Induced Ordering, Assembly, and Defects in Nanoscale Thin-Film Heterostructures
纳米级薄膜异质结构中应变诱导的有序、组装和缺陷
  • 批准号:
    1300223
  • 财政年份:
    2013
  • 资助金额:
    $ 31.5万
  • 项目类别:
    Standard Grant
A Peierls Perspective on Mechanisms of Atomic Friction
佩尔斯对原子摩擦机制的看法
  • 批准号:
    0900027
  • 财政年份:
    2009
  • 资助金额:
    $ 31.5万
  • 项目类别:
    Standard Grant
Scale-Dependent Crystal Plasticity and Nanoindentation-Induced Dislocation Microstructure
尺寸相关的晶体塑性和纳米压痕引起的位错微观结构
  • 批准号:
    0800168
  • 财政年份:
    2008
  • 资助金额:
    $ 31.5万
  • 项目类别:
    Standard Grant

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炎性反应中巨噬细胞激活诱导死亡(activation-induced cell death,AICD)的机理研究
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