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A UNIFIED energy approach TO A CLASS OF MICROMECHANICS MODELS FOR MICROCRACKED SOLIDS

Acta Mechanica Solida Sinica 1995年第2期8卷 110-120页

作者： HUANG, Y HWANG, KC UNIV ARIZONA DEPT AEROSP & MECH ENGNTUCSONAZ 85721 TSING HUA UNIV DEPT ENGN MECHBEIJING 100084PEOPLES R CHINA

Micromechanics models have been developed For the determination of the elastic moduli of microcracked solids based on different approaches and interpretations, including the dilute or non-interacting solution, the Mori-Tanaka method, the self-consistent method, and the generalized self-consistent method. It is shown in the present study that all these micromechanics models can be unified within an energy-equivalence framework, and that they differ only in the way in which the microcrack opening and sliding displacements are evaluated. Relevance to the differential methods and the verification of these models are discussed.

关键词： MICROMECHANICS ELASTIC MODULUS MICROCRACKED SOLID energy approach

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Pendulum waves and basics of «geomechanical thermodynamics»

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Geohazard Mechanics 2023年第1期1卷 38-52页

作者： V.N.Oparin N.A.Chinakal Institute of Mining SB RAS Novosibirsk630091Russia

It is shown that modern achievements in the field of experimental and theoretical researches and developments of innovative measuring systems for monitoring of non-linear dynamic and kinematic characteristics allow to formulate basics of new academic discipline,designated as“geomechanical thermodynamics”.The following circumstances can be considered as the most important prerequisites for development of this new discipline.(1)Practical completeness of the classical thermodynamics,based on kinetic gas theory and molecular movements in solid bodies;(2)Creation of“formular construction tool”for the description of dynamic and kinematic characteristics of pendulum waves and energy conditions of their occurrence and propagation from dynamic sources,located in multi-phased stressed rock mass and geomaterials with block-hierarchical structure;(3)Principal opportunity to establish formal relations between substantial energy carriers of“packages”of nonlinear pendulum waves(geoblocks of certain hierarchical levels according to their diameters)and“molecules”:their movement,velocity and acceleration of the“molecules”↔“geoblock”;“force interactions between molecules”↔“non-linear elastic interaction between geoblocks”,*** term of“geomechanical temperature”is introduced and its analytical expression,which is proportional to kinetic energy of movement of geoblocks with defined volume for their hierarchical subsequence at“confined”conditions of the stressed rock mass,is *** similar aspects are discussed,when emission acousticelectromagnetic fields are fixed using corresponding coefficients of mechanical-electrical and mechanicalacoustic *** order to quantitively describe the evolution of energy state of local zones of stressstrain concentration and surroundings of their non-linear influence from catastrophic events at the natural and mine-engineering systems(earthquakes,rock bursts,etc.),the terms of their geomechanical and thermodynamic stages are introduced

关键词： Geomechanical thermodynamics Pendulum waves energy approach Geomechanical and thermodynamic stages Geomechanical temperature Block-hierarchical structure

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Analysis of Dynamic Stability of Ocean Gravity Structure Foundations

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China Ocean Engineering 1995年第2期10卷 183-192页

作者： He Guangna and Cao Yalin Professor, Dalian University of Technology, Dalian 116024 . Former Postgruate Student, Dalian University of Technology, Dalian 116024

Based on unified equivalent harmonic loading on seabed foundation and energy approach suggested by the authors, the development of dynamic pore water pressure and stability of soil foundation for the vibration of ocean gravity structures excited by random wave loading are analysed. It may be seen that the present method for the study of dynamic problems of ocean gravity structure soil foundations is more reasonable and convenient.

关键词： ocean gravity structure foundation dynamic pore water pressure dynamic stability unified equi- valent harmonic loading energy approach

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