Dynamic wetting of solid-liquid composites and its effects on the mechanical properties

固液复合材料的动态润湿及其对力学性能的影响

• 批准号: 17540393
• 负责人: TAKEI Yasuko
• 金额: $ 1.38万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17540393/
• 关键词: partially molten rock; viscosity; contiguity; melt segregation; viscous anisotropy; GB diffusion creep; rheology; 弾性; 異方性; メルト; 水; ぬれ角; 変形; 界面; 粒界

1, From the deformation experiment of partially molten rock analogue, development of anisotropic microstructure under stress was demonstrated.2, Viscous constitutive relations of partially molten rocks deforming in the regime of grain boundary (GB) diffusion creep are derived theoretically based on microstructural processes at the grain scale. The viscous constitutive relation developed in this study is based on contiguity as an internal state variable, which enables us to take into account the detailed effects of grain-scale melt distribution observed in experiments.3, Compared to the elasticities derived previously for the same microstructural model, the viscosities are much more sensitive to the presence of melt and variations in contiguity. A very small amount of melt (<0.01) significantly reduces the bulk and shear viscosities, which has important implications for melt segregation dynamics.4, A large viscous anisotropy is produced by anisotropy in contiguity, which occurs in deforming partially molten rocks.5, With anisotropic viscosity, a direct coupling between shear and isotropic components of stress occurs and hence the role of shear deformation in melt migration significantly increases. We demonstrate the significant effects of viscous anisotropy on melt migration dynamics for two simple cases. First, in rotary shear deformation, an anisotropy creates a driving force for melt migration up stress gradients in the solid matrix. Second, in uniform simple shear deformation, melt segregates spontaneously into low-angle bands due to anisotropic melt alignment.6, When applied to a simple approximation of flow in the mantle wedge of subduction zone, the anisotropic constitutive relation significantly affects melt migration patterns.

1、通过部分熔融岩石模拟的变形实验，论证了应力作用下各向异性微观结构的发展。2、基于粒级。本研究中开发的粘性本构关系基于作为内部状态变量的连续性，这使我们能够考虑实验中观察到的晶粒尺度熔体分布的详细影响。 3、与之前针对相同微观结构导出的弹性相比模型中，粘度对熔体的存在和邻近变化更加敏感。极少量的熔体（<0.01）显着降低了体积粘度和剪切粘度，这对熔体偏析动力学具有重要意义。 4、邻近各向异性产生大的粘性各向异性，这发生在部分熔融岩石的变形中。 5、对于各向异性粘度，应力的剪切和各向同性分量之间会发生直接耦合，因此剪切变形在熔体迁移中的作用显着增加。我们在两个简单的情况下证明了粘性各向异性对熔体迁移动力学的显着影响。首先，在旋转剪切变形中，各向异性产生了熔体在固体基体中向上应力梯度迁移的驱动力。其次，在均匀简单剪切变形中，由于各向异性熔体排列，熔体自发地偏析成低角度带。6，当应用于俯冲带地幔楔中的流动的简单近似时，各向异性本构关系显着影响熔体运移模式。

项目成果

Viscous and elastic anisotropy in partially molten rocks I: Experimental, field and seismic observations.

部分熔融岩石中的粘性和弹性各向异性 I：实验、现场和地震观测。

• 发表时间: 2007
• 作者: Hiroo Kenzaki;Macoto Kikuchi;Yasuko Takei and B. K. Holtzman
• 通讯作者: Yasuko Takei and B. K. Holtzman

Viscous and elastic anisotropy in partially molten rocks I : Experimental, field and seismic observations

部分熔融岩石中的粘性和弹性各向异性 I：实验、现场和地震观测

• 发表时间: 2007
• 作者: Kazuki Nakanishi;Macoto Kikuchi;B. K. Holtzman and Yasuko Takei;B. K. Holtzman and Yasuko Takei
• 通讯作者: B. K. Holtzman and Yasuko Takei

部分溶融岩石のせん断粘性と体積粘性〜微小なメルトの影響〜

部分熔融岩石的剪切粘度和体积粘度～微小熔融的影响～

• 发表时间: 2007
• 作者: Kazuki Nakanishi;Macoto Kikuchi;B. K. Holtzman and Yasuko Takei;B. K. Holtzman and Yasuko Takei;Yuichi Tamura;Hiroaki Nakamura;Yasuko Takei and B. K. Holtzman;Naomichi Hatano;Naomichi Hatano;Hiroaki Nakamura;Hiroaki NAKAMURA;Hiroaki NAKAMURA;Atsushi Itoh;Hiroaki NAKAMURA;武井 康子;Yuichi Tamura;田村 祐一;Yasuko Take and B. K. Holtzman;武井 康子
• 通讯作者: 武井 康子

差応力下における部分溶融物質の内部構造変化と力学物性への影響

不同应力下部分熔融材料内部结构的变化及其对力学性能的影响

• 发表时间: 2005
• 作者: Kazuki Nakanishi;Macoto Kikuchi;B. K. Holtzman and Yasuko Takei;B. K. Holtzman and Yasuko Takei;Yuichi Tamura;Hiroaki Nakamura;Yasuko Takei and B. K. Holtzman;Naomichi Hatano;Naomichi Hatano;Hiroaki Nakamura;Hiroaki NAKAMURA;Hiroaki NAKAMURA;Atsushi Itoh;Hiroaki NAKAMURA;武井 康子;Yuichi Tamura;田村 祐一;Yasuko Take and B. K. Holtzman;武井 康子;Yasuko Takei and B. K. Holtzman;Yasuko Takei and B. K. Holtzman;Yasuko Takei;Yasuko Takei;Naomichi Hatano;Yasuko Takei;Atsushi Itoh;Yasuko Takei;武井 康子
• 通讯作者: 武井 康子

構造平衡の岩石の粒界ウェットネス:上部マントルの地震波特性の解釈

结构平衡状态下岩石的晶界湿润度：上地幔地震特性的解释

• 发表时间: 2005
• 作者: 芳野極;武井康子;B. Watson
• 通讯作者: B. Watson