力学进展

FRACTAL PORES AND FRACTAL PARTICLES OF ROCK AND SOIL MATERIALS

1993, 23(2): 145-164. doi: 10.6052/1000-0992-1993-2-J1993-015

Abstract(2047)

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Rock and soil materials consist of grains and pores. They arc natural porous media. The presence of pores strongly a＃ects mechanical, physical and chemical properties of the rock and soil materials. Research results indicate that the pore geometry of the rock and soil shows the fractal behavior over the range from atom scale to grain size. So far, fractal geometry has been widely applied to study the porosity, permeability and percolation properties of the rock and soil, and other materials. In this paper, ...

ADVANCES IN THEORETICAL AND APPLIED RESEARCH ON SEISMIC PORE WATER PRESSURE OF SATURATED SAND

1993, 23(2): 165-180. doi: 10.6052/1000-0992-1993-2-J1993-016

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This paper gives a brief look on the history and the practical back-ground of the research on seismic porc water pressure of saturated sand. Then some new advances in the theoretical and applicd research on scisinic pore water pressure with emphasis on several key subjects, such as the main influential factors, developing mechanism, calculating models and applications in practical engineering are reviewed systematically.

RECENT PROGRESS IN STRESS ANALYSIS OF TUBULAR JOINTS OF OFFSHORE PLATFORMS IN CHINA

1993, 23(2): 181-194. doi: 10.6052/1000-0992-1993-2-J1993-017

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The recent research achievements on stress analysis of tubular joints in China arc presented in this paper. Both theoretical analysis and experimental research on the clastic, clasto-plastic and rigid-plastic behaviour of tubular joints are investigated, and their applications to the offshore structures are discussed.

THE SCATTERING OF ELASTIC WAVES BY CRACKS

1993, 23(2): 195-205. doi: 10.6052/1000-0992-1993-2-J1993-018

Abstract(1767)

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The investigation on scattering of elastic waves by cracks is of essential importance in the elastodynamic theory itself and enjoys various applications in many practical problems such as QNDE. So this subject has been extensively studied in recent years and great progress has been made. In this paper, a comprehensive review on this subject is given.

DEVELOPMENT ON MODERN RELIABILITY ANALYSIS THEORY OF STRUCTURAL SYSTEMS AND ITS APPLICATIONS

1993, 23(2): 206-214. doi: 10.6052/1000-0992-1993-2-J1993-019

Abstract(1752)

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The history, trend and existing difficulty of the modern reliability analysis theory of structural systems are briefly reviewed.Emphasis is laid on the attribution, -characteristics and applicable ranges of the FTA method and the, PLSA method used in the field of system reliability analysis and design. For the purpose of application, a discu'ssion is made on the detail reliability analysisand design method used for the structural design of aircraft, ship, pressure vesseland civil building. Based on the work...

FACTORS INFLUENCING SHAKEDOWN OF ELASTOPLASTIC STRUCTURES

1993, 23(2): 214-222. doi: 10.6052/1000-0992-1993-2-J1993-020

Abstract(1988)

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Shakedown analysis is an important part of the structural design or the research on load-bearing capacity. In the present paper, the classical shakedown theory, the methods of shakedown analysis and their engineering applications arc first introduced briefly. Then, in terms of factors influencing structure, shakedown, the paper gives a survey on the recent development of shakedown theory, including its application in thermal load, geometric effects, strainharden-ing and dynamic effects, methods of bounding ...

THE MECHANISM OF ATHEROGENESIS AND MACRO-MOLECULAR TRANSPORT ACROSS THE ARTERIAL WALL

1993, 23(2): 223-233. doi: 10.6052/1000-0992-1993-2-J1993-021

Abstract(1778)

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Atherosclerosis is manily concerned with the system of heart blood vessels. Its study has made considerable advance during the past thirty years. This paper reviews the research work on two important problems: the cellular reactions to blood flow and the transport of macromolecules across the wall. We will'show that some old hypotheses have turned out to be not valid and present . some new viewpoints. Lastly some hot points of this field are shown.

ENTRY CONVERGING FLOW OF VISCOELASTIC FLUIDS

1993, 23(2): 234-248. doi: 10.6052/1000-0992-1993-2-J1993-022

Abstract(2191)

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This paper is a review of theoretical, experimental and numerical studies on the entry flow of viscoelastic fluids. The viscoelastic effect and the mechanism of viscoelastic fluids in the entry converging flow are discussed from the viewpoint of micro-rheology or macro-rheology, and the constitutive equations of the fluids suitable for entry flow problems are analyzed. Finally, the research progress about the entry flow of viscoelastic fluids during recent ten years are briefly reviewed.

THE METHOD OF QUATERNION AND ITS APPLICATION

1993, 23(2): 249-260. doi: 10.6052/1000-0992-1993-2-J1993-023

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In this paper, the application of quaternion in modern science and technology is extensively reviewed. It is shown that quaternion has combined the advantages and functions of other positional parameters and transformation algorithms, it can be applied not only to the dynamics of a rigid body, but also more generally to the mechanical analysis and the control for multi-body systems.

EIGHTEENTH INTERNATIONAL CONGRESS OF THEORETICAL AND APPLIED MECHANICS(Aug. 22-28, 1992. Haifa,farael)

1993, 23(2): 261-268. doi: 10.6052/1000-0992-1993-2-J1993-024

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1993, 23(2): 269-286. doi: 10.6052/1000-0992-1993-2-J1993-025

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1993, 23(2): 287-287. doi: 10.6052/1000-0992-1993-2-J1993-026

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1993, 23(2): 288-288. doi: 10.6052/1000-0992-1993-2-J1993-027

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1993 Vol. 23, No. 2

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