力学进展

1990, 20(1): 1-10. doi: 10.6052/1000-0992-1990-1-J1990-001

Abstract(3761)

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This paper illustrates the evolutions of mechanics from its early stage to the modern mechanics and proposes that modern mechanics may be divided into three areas and thirteen major brances. For each of these major branches a brief survey is presented on its current situation, trend of development, and research problems. The main characteristics of modern mechanics and the motive force of the development of modern .mechanics .are analyzed. The general requirements for a researcher in modern mechanics are su...

NUMERICAL INVESTIGATION ON DUMBBELL MOLECULE MODELS IN POLYMER RHEOLOGY

1990, 20(1): 11-23. doi: 10.6052/1000-0992-1990-1-J1990-002

Abstract(2754)

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A numerical method to solve the diffusion equation in configuration space for the distribution function of dumbbell models is described and the rheo-logical propcrli.cs of several models are calctilaled by using the method. This method is combined with the boundary clement method for solving the conservation equations in fluid dynamics in general cases. It is possible to use a molecular model which has no relevant constitutive equation to lake the place of the constitutive equation in continuum mechanics fo...

ON THE DECOMPOSITION OF STRAIN AND STRAIN RATE IN FINITE ELASTO-PLASTIC THEORY

1990, 20(1): 24-39. doi: 10.6052/1000-0992-1990-1-J1990-003

Abstract(3050)

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The paper presents a systematical review on the recent studies for the problem of decomposition of strain and strain rate in finite elasto-plastic deformation theory. Particularly, a detailed analysis is given to the different arguments, which exist in many different schools. At the same time, the authors also present their own point of view and re-evaluate the problem of strain rate decomposition on the basis of defect field theory.

THE PARADOX IN PLASTIC BUCKLING OF PLATES AND SHELLS AND THE RESEARCH PROGRESS

1990, 20(1): 40-46. doi: 10.6052/1000-0992-1990-1-J1990-004

Abstract(2241)

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The paper systematically summarizes the paradox in plastic buckling of plates and shells and its research progress overpast decades, and discusses various theories on the paradox.

THE APPLICATIONS OF STRESS-WAVE THEORY TO PILE ENGINEERING

1990, 20(1): 47-56. doi: 10.6052/1000-0992-1990-1-J1990-005

Abstract(2448)

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This paper presents on historical overview of the stress wave theory applied to piles and gives its state-of-the-art and problems to be solved.

ADVANCES IN THE RESEARCH OF FAHRAEUS EFFECT OF BLOOD FLOWING THROUGH NARROW TUNNELS

1990, 20(1): 57-68. doi: 10.6052/1000-0992-1990-1-J1990-006

Abstract(3427)

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本文详细论述了毛细管和二维狭缝中流过血液时的Fahraeus效应研究历史及现状,给出了迄今为止得到的全部结论,并报道了笔者对狭缝缝隙中Fahraeus效应研究的最新进展。本文所涉及的内容对于微循环的理论与应用以至有关流变学仪器的设计优化都有重要意义。【英文摘要】 In this paper, the history and achievements in the research of the Fahracus effect of blood flowing through capillaries and narrow two-dimensional channels are reviewed in details. The results and conclusions arc presented which were obtained by investigators up to now. The present authors studied the Fahracus effect of sheet flow and made experimental studies. The result revealed the difference of the effect between the sheet flow and the tube flow. Those problems arc of great importance to microcirculalor...

THE ELECTRICAL FLUID MECHANICS IN MICROGRAVITY FIELD

1990, 20(1): 69-82. doi: 10.6052/1000-0992-1990-1-J1990-007

Abstract(2522)

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This paper reviews the background of space bioproccssing, some essential problems of electrical fluid mechanics in microgravilational environment. And the possible tactics to deal with these problems arc also discussed.

A REVIEW ON FUNDAMENTAL STUDY OF COMBUSTION AT MICROGRAVITY CONDITIONS

1990, 20(1): 83-92. doi: 10.6052/1000-0992-1990-1-J1990-008

Abstract(2605)

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Fundamental studies of combustion at microgravity conditions are reviewed. There is no buoyancy and natural convection at microgravity condition, which will affect the fundamental process of combustion. Theoretical and experimental studies have shown that the flame structure, flame propagation and the stability of flame etc. at microgravity condition are quite different from that at normal gravity.

AVERAGE ACCIDENT AND PLASTICITY

1990, 20(1): 93-99. doi: 10.6052/1000-0992-1990-1-J1990-009

Abstract(2186)

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The paper gives the statistics about average accidents which took place in a certain province of East China from 1985 to 1986 and in all over the country from 1977 to 1985. By analyzing a large number of original records about average accidents, we summarize their causes and the serious results, and present an effective design technique to prevent ship-bodies from collision, Through plenty of research on ship-bodies deformations which result from colliding, substructure assumption is presented. It is the pr...

1990, 20(1): 100-104. doi: 10.6052/1000-0992-1990-1-J1990-010

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1990, 20(1): 105-113. doi: 10.6052/1000-0992-1990-1-J1990-011

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1990, 20(1): 114-134. doi: 10.6052/1000-0992-1990-1-J1990-012

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1990, 20(1): 135-135. doi: 10.6052/1000-0992-1990-1-J1990-013

Abstract(1934)

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1990 Vol. 20, No. 1

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