Integrated Analytical-Computational Analysis of Microstructural Influences on Seismic Anisotropy
微观结构对地震各向异性影响的综合解析计算分析
基本信息
- 批准号:1118786
- 负责人:
- 金额:$ 29.82万
- 依托单位:
- 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:2011-08-15 至 2015-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The magnitudes, orientations and spatial distributions of elastic anisotropy in Earth?s crust and mantle carry valuable information about gradients in thermal, mechanical and kinematic parameters arising from mantle convection, mantle-crust coupling and tectonic plate interactions. Relating seismic signals to deformation regimes requires knowledge of the elastic signatures (bulk stiffnesses) of different microstructures that characterize specific deformation environments, but the influence of microstructural heterogeneity on bulk stiffness has not been comprehensively evaluated. The objectives of this project are to: (1) scale up a preliminary method to determine the bulk stiffness of rocks using integrated analytical (electron backscatter diffraction) and computational (asymptotic expansion homogenization) approaches that fully account for the grain-scale elastic interactions among the different minerals in the sample; (2) apply this integrated framework to investigate the effect on elastic anisotropy of several common crustal microstructures; (3) integrate time-dependent microstructure modeling with bulk stiffness calculations to investigate the effects of strain- and process-dependent microstructure evolution on elastic anisotropy in mantle rocks; and (4) disseminate open-source software for the calculation of bulk stiffnesses from electron backscatter diffraction data and creation of synthetic (computer generated) microstructures that can be used in sensitivity analyses among other applications. Because commonly used methods, such as the Voigt, Reuss and Voigt-Reuss-Hill averages, for calculating bulk rock stiffnesses do not account for elastic interactions among the constituent minerals, they exhibit marked, non-systematic differences from stiffnesses obtained using asymptotic expansion homogenization.These objectives are important because the results would substantially improve understanding of the nature of seismic anisotropy in the Earth's crust, which is composed of rocks dominated by low symmetry minerals with complex structures. Traditional methods for performing these calculations do not easily incorporate these effects. This project will develop an elegant, easily-implemented alternative method for anisotropic materials. The scientific results and computational tools that result from this project will have global application across a number of solid Earth and engineering disciplines. Open-source codes developed in this project will made available through existing open-source ELLE platform. Classroom exercises developed for Earth Science and Mechanical Engineering courses that employ this software will be make available to the community, probably through the Science Education Resource Center website at Carleton College.
地壳和地幔弹性各向异性的大小、方向和空间分布携带了地幔对流、地幔-地壳耦合和构造板块相互作用产生的热、机械和运动学参数梯度的宝贵信息。将地震信号与变形状态联系起来需要了解表征特定变形环境的不同微观结构的弹性特征(体积刚度),但微观结构不均匀性对体积刚度的影响尚未得到全面评估。该项目的目标是:(1)扩大初步方法的规模,使用综合分析(电子背散射衍射)和计算(渐近膨胀均质化)方法来确定岩石的体积刚度,该方法充分考虑了样品中不同矿物之间的颗粒尺度弹性相互作用; (2)应用该综合框架研究几种常见地壳微观结构对弹性各向异性的影响; (3) 将随时间变化的微观结构建模与体积刚度计算相结合,研究随应变和过程变化的微观结构演化对地幔岩石弹性各向异性的影响; (4) 传播开源软件,用于根据电子背散射衍射数据计算体积刚度,并创建可用于灵敏度分析等应用的合成(计算机生成)微观结构。由于用于计算块体岩石刚度的常用方法(例如 Voigt、Reuss 和 Voigt-Reuss-Hill 平均值)并未考虑组成矿物之间的弹性相互作用,因此它们与使用渐近膨胀均质化获得的刚度表现出明显的非系统差异。这些目标非常重要,因为结果将大大提高对地球地震各向异性本质的理解。 地壳是由以低对称性矿物为主、结构复杂的岩石组成的。执行这些计算的传统方法不容易纳入这些影响。该项目将为各向异性材料开发一种优雅且易于实施的替代方法。该项目的科学成果和计算工具将在全球多个固体地球和工程学科中得到应用。该项目开发的开源代码将通过现有的开源 ELLE 平台提供。为使用该软件的地球科学和机械工程课程开发的课堂练习将向社区提供,可能通过卡尔顿学院的科学教育资源中心网站提供。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Pervasive cracking of heterogeneous brittle materials using a multi-directional smeared crack band model
- DOI:10.1016/j.ijmecsci.2017.09.016
- 发表时间:2017-09
- 期刊:
- 影响因子:7.3
- 作者:A. C. Cook;S. Vel;S. E. Johnson
- 通讯作者:A. C. Cook;S. Vel;S. E. Johnson
Modification of crustal seismic anisotropy by geological structures (“structural geometric anisotropy”)
- DOI:10.1130/ges01655.1
- 发表时间:2019-02
- 期刊:
- 影响因子:2.5
- 作者:D. Okaya;S. Vel;W. Song;S. E. Johnson
- 通讯作者:D. Okaya;S. Vel;W. Song;S. E. Johnson
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Scott Johnson其他文献
Artificial Intelligence Optical Biopsy for Evaluating the Functional State of Wounds.
用于评估伤口功能状态的人工智能光学活检。
- DOI:
10.1016/j.jss.2023.07.017 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Joseph Teague;D. Socia;G. An;S. Badylak;Scott Johnson;Peng Jiang;Y. Vodovotz;R. Cockrell - 通讯作者:
R. Cockrell
Laying the framework for developing executive functions in tweens with learning disabilities
为有学习障碍的青少年发展执行功能奠定框架
- DOI:
10.1016/b978-0-12-819545-1.00011-4 - 发表时间:
2020 - 期刊:
- 影响因子:5.2
- 作者:
Fernando Pastrana;Patricia A. McElroy;Scott Johnson;K. Chustz;Darlyne G. Nemeth - 通讯作者:
Darlyne G. Nemeth
A 1 . 2 MP 1 / 3 ” CMOS Image Sensor with Light Flicker Mitigation
具有光闪烁抑制功能的 1.2 MP 1/3” CMOS 图像传感器
- DOI:
- 发表时间:
2015 - 期刊:
- 影响因子:0
- 作者:
C. Silsby;S. Velichko;Scott Johnson;Y. P. Lim;R. Mentzer;Jeff Beck - 通讯作者:
Jeff Beck
INCIDENCE OF UNDETECTED LUNG NEOPLASMS IN EXPLANTS OF LUNG TRANSPLANT RECIPIENTS: EXPERIENCE OF A SINGLE CENTER
- DOI:
10.1016/s0012-3692(16)51048-4 - 发表时间:
2005-10-01 - 期刊:
- 影响因子:
- 作者:
Deborah J. Levine;Luis Angel;Andres Pelaez;Scott Johnson;John Calhoon;Stephanie Levine - 通讯作者:
Stephanie Levine
MP34-05 THE OXIDATIVE STRESS RESPONSE OF UROTHELIAL CARCINOMA CELLS TO BCG EXPOSURE
- DOI:
10.1016/j.juro.2014.02.1018 - 发表时间:
2014-04-01 - 期刊:
- 影响因子:
- 作者:
Gopitkumar Shah;Fanghong Chen;Gina Lockwood;Scott Johnson;Jacek Zielonka;Balaraman Kalyanaraman;William See - 通讯作者:
William See
Scott Johnson的其他文献
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{{ truncateString('Scott Johnson', 18)}}的其他基金
Quartz grain-boundary topology as a stress and strain-rate meter and a new flow law
石英晶界拓扑作为应力和应变率计以及新的流动定律
- 批准号:
2243658 - 财政年份:2023
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
Dynamic Fragmentation and Earthquake Energy Partitioning
动态破碎与地震能量划分
- 批准号:
2150831 - 财政年份:2022
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
Dynamic fragmentation and inelastic energy partitioning at the base of the seismogenic zone
发震带底部的动态碎裂和非弹性能量分配
- 批准号:
1727090 - 财政年份:2017
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
Origin and Vertical Extent of Damage Zones Around Continental Strike-slip Faults
大陆走滑断层周围破坏带的起源和垂直范围
- 批准号:
1347087 - 财政年份:2014
- 资助金额:
$ 29.82万 - 项目类别:
Continuing Grant
Kinematic Vorticity Gauges and the Rheology of Mylonitic Shear Zones
运动涡度计和糜棱岩剪切带的流变学
- 批准号:
0911150 - 财政年份:2009
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
Collaborative Research: Dynamics at the Base of a Pseudotachylyte-bearing Fault System
合作研究:含假速石断层系统基础的动力学
- 批准号:
0810039 - 财政年份:2008
- 资助金额:
$ 29.82万 - 项目类别:
Continuing Grant
Workshop: A Neoconstructivist Approach to Early Cognitive Development to be held September 15-16 2006 in New York City
研讨会:早期认知发展的新建构主义方法将于 2006 年 9 月 15 日至 16 日在纽约举行
- 批准号:
0617554 - 财政年份:2006
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
Coupled Deformation and Metamorphism, Fabric Development, Rheological Evolution and Strain Localization
耦合变形和变质、织物开发、流变演化和应变定位
- 批准号:
0440063 - 财政年份:2005
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$ 29.82万 - 项目类别:
Standard Grant
Architecture and Evolution of an Accretionary Orogen
增生造山带的构造和演化
- 批准号:
0126004 - 财政年份:2002
- 资助金额:
$ 29.82万 - 项目类别:
Standard Grant
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