Earthquake processes in a micromorphic continuum
Earthquake processes in a micromorphic continuum
复制标题
微形态连续体中的地震过程
DOI：
10.1007/bf00876588
复制
发表时间：
1973
影响因子：
2
通讯作者：
R. Teisseyre
中科院分区：
文献类型：
--
作者：
R. Teisseyre
介绍了一种基于微形态连续体理论的地震过程新模型。焦点区域中的过程通过微观结构随时间的变形来描述。假设破裂过程以及变质现象的相变在过去引起了某些不可逆的变化，这些变化决定了焦点区域的微观结构。这些内部微观结构元素形成附着点，力偶应力围绕该附着点产生。焦点区域的特性由本构方程确定。微形态力学认为体偶的存在是由区域应力决定的，并关注焦点区域中的应力、应力力矩和应变的响应场。此外，还解释了微位错场如何与微变形和微形结构相关。在所考虑的地震结构模型中，通过微惯性张量假设微各向异性。该张量描述了微量元素的分布。提出了焦点区域中波过程的简单解决方案。讨论了波的色散。
The paper introduces a new model earthquake process based on the theory of micromorphic continua. The processes in a focal region are described by deformations of microstructure in time. It is assumed that the fracturing processes as well as phase transformation of metamorphic phenomena have caused in the past certain non-reversible changes which determine the microstructure of focal region. These internal microstructural elements form the attaching points around which the couple stresses arise. The properties of focal region are determined by the constitutive equations. The micromorphic mechanics considers the existence of body couples as determined by a regional stresses and looks after a response field of stresses, stress moments and strains in the focal region. Further, it is explained how microdislocation field is connected with microdeformations and micromorphic structure. In the considered earthquake structure model a microanisotropy is assumed through the tensor of microinertia. This tensor describes a distribution of microelements. Simple solutions of wave processes in a focal region are presented. The dispersion of waves is discussed.