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.
地球弹性各向异性的大小、方向和空间分布地幔对流、幔壳耦合和板块构造作用等引起的热、力学和运动学参数梯度的变化,为地壳和地幔的演化提供了重要的信息。有关地震信号的变形制度需要的弹性签名(体刚度)的不同的微观结构,表征特定的变形环境的知识,但微观结构的不均匀性对体刚度的影响还没有得到全面评估。本项目的目标是:(1)扩大一个初步的方法,以确定整体刚度的岩石使用集成的分析(电子背散射衍射)和计算(渐近膨胀均匀化)方法,充分考虑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了几种常见地壳微结构对弹性各向异性的影响;(3)将随时间变化的微结构模拟与体刚度计算相结合,以研究应变和过程相关的微结构演化对地幔岩石弹性各向异性的影响;以及(4)传播用于从电子背散射衍射数据计算体刚度和创建可用于灵敏度分析以及其他应用的合成(计算机生成)微结构的开放源代码软件。由于常用的方法,如Voigt,Reuss和Voigt-Reuss-Hill平均值,用于计算块体岩石的刚度,并不考虑组成矿物之间的弹性相互作用,它们与用渐近展开均匀化方法得到的刚度有明显的、非系统的差异。这些目标是重要的,因为这些结果将大大提高对地壳中地震各向异性性质的理解,它是由结构复杂的低对称矿物为主的岩石组成。执行这些计算的传统方法不容易包含这些效应。该项目将为各向异性材料开发一种优雅,易于实施的替代方法。该项目产生的科学成果和计算工具将在全球范围内应用于许多固体地球和工程学科。本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提供给社区,可能是通过卡尔顿学院的科学教育资源中心网站。
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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