A study for the prediction of precursory slips based on the contact mechanics of asperities

基于粗糙体接触力学的前兆滑移预测研究

基本信息

  • 批准号:
    09440162
  • 负责人:
  • 金额:
    $ 6.34万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
  • 财政年份:
    1997
  • 资助国家:
    日本
  • 起止时间:
    1997 至 2000
  • 项目状态:
    已结题

项目摘要

This study consists of the following three projects.1. Indentation experiment. We performed a series of indentation scratch tests mainly on metal samples, such as aluminum, copper, and brass. We found that the indenter penetrated deeper into the sample with the onset of horizontal movement of the indenter, and that it floated up with the progress of the horizontal movement. A simulation was performed with a model, which well agreed with the observation. We focused on the fact that the initial friction force was always slightly higher than the friction at steady state. This may correlate the fact that static friction is larger than the dynamic friction.2. An experimental trial to detect precursory slips by transmission waves across a fault. Using a biaxial sandwich type apparatus at ERI, the University of Tokyo, we performed a series of stick-slip experiments in which P- and S-waves were transmitted across the fault. We found that the transmitted waves are sensitive to the contact states of the fault. With the increase in shear stress, the amplitude of the transmitted waves significantly increased. However, the increasing rate was slightly decreased with the onset of the precursory slips. This is interpreted as the effects of the replacement of asperity contacts.3. An experiment to investigate the effects of fault geometry (asperity height, asperity size, spacing etc.) on the transmission waves. Elastic waves were transmitted across an artificial fault. Parallel grooves with various widths and depths were cut on the fault surfaces. We found that the transmissivity of the waves is solely determined by the ratio of the groove depth/width to wavelength. We have also made a mathematical model based on the stiffness of the fault. The model well explains the observation when the wavelength is 4 times longer than the size of contacting asperities.
本研究包括以下三个项目.压痕实验。我们主要对铝、铜和黄铜等金属样品进行了一系列压痕划痕试验。我们发现,随着压头水平运动的开始,压头更深地穿透到样品中,并且随着水平运动的进行,压头浮起。用一个模型进行了模拟,与观测结果吻合得很好。我们关注的事实是,初始摩擦力总是略高于稳定状态下的摩擦力。这可能与静摩擦力大于动摩擦力有关.利用跨断层透射波探测断层错动的实验研究。利用东京大学ERI的双轴夹层型装置,我们进行了一系列粘滑实验,其中P波和S波穿过断层。我们发现,透射波是敏感的接触状态的故障。随着剪切应力的增加,透射波的振幅显著增大。但随着地震的发生,其增长率略有下降。这被解释为凹凸接触的替换的效果。3.一项研究断层几何形状(粗糙体高度、粗糙体尺寸、间距等)影响的实验。在传输波上。弹性波通过人工断层传播。在断层面上切割不同宽度和深度的平行槽。我们发现,波的透射率仅由槽深/槽宽与波长的比值决定。建立了基于断层刚度的数学模型。该模型很好地解释了当波长比接触微凸体的尺寸长4倍时的观察结果。

项目成果

期刊论文数量(53)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
藤本隆士,吉岡直人 他: "接線力による接触面間の微小変位特性(第2報)-等方性粗さ面の場合の弾性変形とすべりによる変位機構の解析に関する実験的検討"トライボロジスト. 42. 403-410 (1997)
Takashi Fujimoto、Naoto Yoshioka 等人:“切向力引起的接触表面之间的小位移特性(第二次报告) - 各向同性粗糙度表面情况下弹性变形和滑移引起的位移机制分析的实验研究” 摩擦学家 42. 403 -410 (1997)
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    0
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Suzuki,A.,and N.Yoshioka: "Dynamics of asperity contacts, A scratch test by a new indentation apparatus"Geological Survey Japan Interim Report. EQ/99/1. 22-25 (1999)
Suzuki, A. 和 N.Yoshioka:“粗糙接触动力学,新型压痕装置的划痕测试”日本地质调查局中期报告。
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    0
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Iwasa, K., and N.Yoshioka: "An experimental trial to detect precursory slips by transmission waves across a fault"Geophys.Res.Lett.. 25. 3907-3910 (1998)
Iwasa, K. 和 N.Yoshioka:“通过跨断层的传输波检测前兆滑动的实验性试验”Geophys.Res.Lett.. 25. 3907-3910 (1998)
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    0
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藤本隆士, 吉岡直人, 他: "接線力のよる接触面間の微小変異特性(第1報)および(第2報)" トライボロジスト. 42巻5号. 75-82 83-90 (1997)
Takashi Fujimoto、Naoto Yoshioka 等人:“切向力引起的接触表面之间的微小变化特性(第 1 次报告)和(第 2 次报告)”摩擦学家,第 42 卷,第 5 期。75-82 83-90 (1997)
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    0
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吉岡直人: "震源域における前兆的すべりを能動的に検出するための研究の必要性とその可能性" 地震II. 51巻(不明). (1998)
Naoto Yoshioka:“主动探测震中地区前兆滑动的研究的必要性和可能性”,《地震 II》第 51 卷(未知)。
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YOSHIOKA Naoto其他文献

YOSHIOKA Naoto的其他文献

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{{ truncateString('YOSHIOKA Naoto', 18)}}的其他基金

A trial for forecasting earthquakes from clarifying the critical state of a sandpile
从明确沙堆临界状态预测地震的尝试
  • 批准号:
    21540442
  • 财政年份:
    2009
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Physical elucidation of the behaviors of sand-pile avalanches like self-organized criticality and like characteristic earthquakes
对沙堆雪崩行为(如自组织临界性和特征地震)的物理解释
  • 批准号:
    18340134
  • 财政年份:
    2006
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
An experimental trial to detect nucleation processes of faults with a gouge layer by transmission waves
透射波探测凿岩层断层成核过程的实验研究
  • 批准号:
    14340134
  • 财政年份:
    2002
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
A research for earthquake source mechanics based on the contact theory
基于接触理论的震源力学研究
  • 批准号:
    05640470
  • 财政年份:
    1993
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Micromechanics in frictional dynamics of faults
断层摩擦动力学的微观力学
  • 批准号:
    02452056
  • 财政年份:
    1990
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

相似海外基金

ASPERITY: Aseismic SliP and Earthquake Ruptures: Interrogating Transitions in rheologY
粗糙度:抗震滑移和地震破裂:探讨流变学的转变
  • 批准号:
    EP/Y024672/1
  • 财政年份:
    2024
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Research Grant
Construction of an asperity model considering depth dependency of stress drop for more quantitative strong motion simulation
考虑应力降的深度依赖性构建粗糙模型,以进行更定量的强运动模拟
  • 批准号:
    19H02405
  • 财政年份:
    2019
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Asperity of seismogenic faults from geological point of view
从地质角度看发震断层的粗糙度
  • 批准号:
    15K13582
  • 财政年份:
    2015
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Understanding the mechanism of acoustic emission generation due to surface asperity interaction in mixed lubrication conditions
了解混合润滑条件下由于表面粗糙相互作用而产生声发射的机制
  • 批准号:
    EP/L021757/1
  • 财政年份:
    2014
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Research Grant
High-speed monitoring of asperity structure by similar earthquake discrimination method using GPU computing
利用GPU计算的类似地震判别法对凹凸结构进行高速监测
  • 批准号:
    24656546
  • 财政年份:
    2012
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Studies of Friction and Adhesion in Nanoscale Asperity-Asperity Contacts
纳米级粗糙体-粗糙体接触中的摩擦和粘附研究
  • 批准号:
    1131361
  • 财政年份:
    2011
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Standard Grant
Effect of periodic loading on asperity rupture
周期性载荷对粗糙体破裂的影响
  • 批准号:
    23540492
  • 财政年份:
    2011
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Relationship between crustal velocity structure and asperity of active faults
地壳速度结构与活动断裂粗糙度的关系
  • 批准号:
    22510192
  • 财政年份:
    2010
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Mechanics of Nanoscale Single Asperity Contacts in Friction Force Microscopy
摩擦力显微镜中纳米级单粗糙体接触的力学
  • 批准号:
    EP/F039999/1
  • 财政年份:
    2008
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Research Grant
A study on dynamic rupture process of an asperity and radiation of short-period seismic waves
凹凸体动态破裂过程及短周期地震波辐射研究
  • 批准号:
    20540407
  • 财政年份:
    2008
  • 资助金额:
    $ 6.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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