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1995 Vol. 25, No. 4

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TRENDS OF DEVELOPMENT IN MECHANICS IN THE EARLY 21ST CENTURY
1995, 25(4): 433-441. doi:10.6052/1000-0992-1995-4-J1995-001
Abstract(2311) PDF(1378)
Abstract:
The history of mechanics is reviewed in the light of the position and functions of mechanies in the development of science and technology:the understanding of natural lows and solution of engineering problems,Some major research topics are discussed in solid mechanics,fluid mechanies,general mecha-nics and in the area of mechnies-related cross-disiplines. Trends of mecha-nics development in the 21st century(especially in its carly period) is also given
Retrospects and prospects of fluid mechanics
1995, 25(4): 442-450. doi:10.6052/1000-0992-1995-4-J1995-002
Abstract(2742) PDF(2775)
Abstract:

An overview on the developments of modern fluid mechanics is pre-sented in this article,We have briefly described the main achievements invarious branches of the subject and the contributions to them by great masters inthe mechanics community and by Chinese scientists of older generation,In par-ticular,maturity of computational fluid mechanics, advances in nonlinearmechanics and emergence of new branches are responsible for the formation ofthe features of this period in the last three decades or so,When loo...
REVIEW ON THE STATISTICAL MECHANICS OF MESO-DAMAGE AND FRACTURE FOR GLASSY POLYMERS
1995, 25(4): 451-470. doi:10.6052/1000-0992-1995-4-J1995-003
Abstract(1565) PDF(1246)
Abstract:
The recent progrcsses in the eriterion,mechanism, kipnetics and statistical model of meso-damage and fracture for glassy polymers have been reviewed in details.The application of meso-damaged statistical method to the fields of metal materials and glassy polymers,is also discussed.
PROGRESS IN THE STUDY OF DYNAMICAL COMPLEXITY IN NONLINEAR AND TURBULENT PROCESS OF ATMOSPHERE
1995, 25(4): 471-501. doi:10.6052/1000-0992-1995-4-J1995-004
Abstract(1652) PDF(760)
Abstract:
This paper deals with the macro- properties of chaotic cvolution,growing mechanism with condensation and solidarity of aerosol,coherent structureof turbulence,catastrophe and multiple-balanced states of system at criticalpoints,topological characteristic of Typhoon and soliton appearing in the non-linear and turbulent process of atmospheric system by using experimental mathe-matical method, model of cellular automata(parallel algorithm and analogy topractical process),analogy experiment of large scale annu...
HYDRAULIC MECHANISM OF SOIL EROSION (1)-WATER EROSION
1995, 25(4): 501-514. doi:10.6052/1000-0992-1995-4-J1995-005
Abstract(1989) PDF(1142)
Abstract:
The rapid increase of soil erosion poses a severe threat against the agriculture development and human ststenance and becomes one of the global environmental disasters. Hence, more and more attention has been attracted to the studies of soil erosion as well as to the prediction and control of erosion.In the present paper, a comprehensive literature survey is made on water erosion and the relevant investigation progress is analyzed and estimated.
THE DISLOCATION CON0IGURATION EVOLUTION DURING FATIGUE PROCESS IN HCP METALS──WITH A DISCUSSION ON THE APPLICATION OF DISLOCATION THEORY AND SYNERGETICS IN MATERIALS SCIENCE
1995, 25(4): 515-524. doi:10.6052/1000-0992-1995-4-J1995-006
Abstract(1593) PDF(1177)
Abstract:
This paper gives a brief overview of the history of the progress of dislocation theory and its studies in China, the application of dislocation theory,and the typical dislocation configurations in metals. The synergetics concept applied to dislocation research, and some of recent results obtained in HCP titanium and zirconium are also introduced.
SOME DEVELOPMENTS AND PROBLEMS IN MAGNETOELASTIC BUCKLING OF THIN PLATES
1995, 25(4): 525-536. doi:10.6052/1000-0992-1995-4-J1995-007
Abstract(1574) PDF(793)
Abstract:
This paper presents some developments in the theoretical and experi-mental researches on magnetoelastic buckling of elastic ferromagnetic thin plates in an external transverse magnetic field, which is a new and coupling problems between magnetics and mechanics. After introducing the authors' new contribut-ions in this field, we present some problems which remain to be studied in a near future.
ADVANCES IN THE MODERN RELIABILITY EVALUATION THEORY OF STRUCTURAL SYSTEMS
1995, 25(4): 537-548. doi:10.6052/1000-0992-1995-4-J1995-008
Abstract(1530) PDF(1257)
Abstract:
In this paper, a brief introduction is given to the developing status of modern reliability evaluation theory of a large scale structural systems, and a systematic analysis is made on those reliability evaluation methods which are widely used in the last decades. Emphasis is laid on the main principle of the cxact cvaluation theory of complex systems, and a prediction is made on the applicalion prospect of random finite elernent method, direct Monte Carlo simulation, response surface method and generalized...
ON THE SOME ADVANCES IN STUDIES OF STRUCTURAL DYNAMIC PLASTIC FAILURE
1995, 25(4): 549-561. doi:10.6052/1000-0992-1995-4-J1995-009
Abstract(1497) PDF(1256)
Abstract:
This paper presents recent advances in the studies of dynamic plastic failure of commonly used engineering structural elements (such as beams, plates,cylindrical shells, circular rings, and structures of sandwich or composite materlals), subjected to large dynamic loads over a short-duration. The failure modes of such structural elements are of universal significance. It is suggested in this paper that a nondimensional number, the damage number, be used to represent a universal failure criterion for differe...
1995, 25(4): 562-565. doi:10.6052/1000-0992-1995-4-J1995-010
Abstract(1912) PDF(1739)
Abstract:
This articlc proposcs a new finite clement space, which uses Lagrangian type intcrpolation space with an arbitrary series expansion with any number of generalized displacements on each node instcad of just one generalized displacement. This new space may include the analytic method and the P-version method. It is a conforming space and keeps all the degrees of freedom on the nodal points, so it is casy for implementation and is compatablc With thc con-ventional finite clement programs. The crror estimatc is...

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