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scattering of elastic waves IN AN elastic MATRIX CONTAINING AN INCLUSION WITH INTERFACES

Acta Mechanica Solida Sinica 2002年第3期15卷 270-276页

作者： Li Fengming Hu Chao Huang Wenhu Harbin Inst Technol Dept Aerosp Engn & Mech Harbin 150001 Peoples R China

Based on the theory of elastic dynamics, the scattering of elasticwaves and dynamic stress concentration of fiber-reinforced compositewith interfaces are studied. Analytical expressions of elastic wavesin different medium areas are presented and an analytic method ofsolving this problem is established. The mode coefficients aredetermined by means of the continuous conditions of displacement andstress on the boundary of the interfaces. The influence of materialproperties and structural size on the dynamic stress con- centrationfactors near the interfaces is analyzed.

关键词： fibre-reinforced composite interfaces scattering of elastic waves dynamicstress concen- tration

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MULTIPLE scattering AND DYNAMIC STRESS ANALYSIS OF elastic waves IN A FIBER—REINFORCED COMPOSITE WITH INTERFACES

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Acta Mechanica Sinica 2003年第3期19卷 263-269页

作者：李凤明胡超徐敏强黄文虎 Department of Aerospace Engineering and Mechanics Harbin Institute of TechnologyHarbin 150001China

Based on the theory of elastic dynamics,multiple scattering of elastic waves and dynamic stress concentrations in fiber-reinforced composite are *** analytical expressions of elastic waves in different regions are *** mode coefficients of elastic waves are determined in accordance with the continuous conditions of displacement and stress on the boundary of the *** using the addition theorem of Hankel functions,the formula of scattered wave fields in different local coordinates are transformed into those in one local coordinate to determine the unknown coefficients and dynamic stress concentration factors (DSCFs).The influences of the distance between two inclusions,material properties and structural size on the DSCFs near the interfaces are *** examples,the numerical results of DSCFs near the interfaces for two kinds of fiber-reinforced composites are presented and discussed.

关键词： fiber-reinforced composite multi-interfaces scattering of elastic waves dynamic stress concentration

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elastic WAVE scattering AND DYNAMIC STRESS IN COMPOSITE WITH FIBER

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Applied Mathematics and Mechanics(English Edition) 2003年第7期24卷 808-816页

作者：胡超李凤明黄文虎 Department of Aerospace Engineering & Mechanics Harbin Institute of Technology

Based on the theory of elastic dynamics, multiple scattering of elastic waves and dynamic stress concentrations in fiber_reinforced composite were studied. The analytical expressions of elastic waves in different region were presented and an analytic method to solve this problem was established. The mode coefficients of elastic waves were determined in accordance with the continuous conditions of displacement and stress on the boundary of the multi_interfaces. By making use of the addition theorem of Hankel functions, the formulations of scattered wave fields in different local coordinates were transformed into those in one local coordinate to determine the unknown coefficients and dynamic stress concentration factors. The influence of distance between two inclusions, material properties and structural size on the dynamic stress concentration factors near the interfaces was analyzed. It indicates in the analysis that distance between two inclusions, material properties and structural size has great influence on the dynamic properties of fiber_reinforced composite near the interfaces. As examples, the numerical results of dynamic stress concentration factors near the interfaces in a fiber_reinforced composite are presented and discussed.

关键词： fiber_reinforced composite multi_interfaces scattering of elastic waves dynamic stress concentration

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The scattering of plane P1 wave by a 3-D sedimentary basin in a fluid-saturated poroelastic half-space using IBEM

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Earthquake Science 2019年第3期32卷 143-156页

作者： Chenrui He Zhongxian Liu Lei Liu Tianjin Key Laboratory of Civil Structure Protection and Reinforcing Tianjin Chengjian UniversityTianjin 300384China

The indirect boundary element method(IBEM)is applied to investigate the scattering of elastic waves around a 3-D sedimentary basin filled with fluid-saturated poroelastic *** on this method,the free field and scattered field can be solved according to the boundary *** the numerical accuracy has been *** effects of parameters on elastic wave scattering are studied,such as boundary condition,incident frequency,incident angle and porosity of *** results illustrate that the amplification effect of surface displacement near poroelastic sedimentary basin is *** addition,for the case of large porosity the drainage condition has a significant impact on the response *** to the fluid exchange at the interface under the drained condition,the displacement amplitude can be much larger than that under the undrained condition in present *** study can provide a theoretical basis for the anti-seismic design of engineering structures located in sedimentary basin.

关键词： indirect boundary element method scattering of elastic waves sedimentary basin fluid-saturated poroelastic medium

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