力学进展

1999, 29(1): . doi: 10.6052/1000-0992-1999-1-J1998-063

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ADVANCES AND TRENDS OF GENERALIZED CONTINUUM FIELD THEORIES

1999, 29(1): 1-8. doi: 10.6052/1000-0992-1999-1-J1998-051

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In this paper the development process and the recent research situations in the study of generalized continuum field theories are briefly reviewed. Moreover, some proposals including their propose, nonlinear theories, multifield problems, computerized tendency, physical parameters and applications for the future study are made.

ADVXNCES OF DYNAMIC RZSPONSE ANALYSIS BASED ON STOCHASTIC FINITE ELEMENT METHOD

1999, 29(1): 9-18. doi: 10.6052/1000-0992-1999-1-J1998-052

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Various approaches of random dynamic response analysis of structures with stochastic parameters, including random simulation, perturbation stochastic finite element method, dynamic stochastic finite element method and orthogonal expansion, are comprehensively discussed in this paper. The new advances of random dynamic response analysis of structures with stochastic parameters are reviewed. The existing problems and the future improvement trends are also briefly outlined.

SHAPE MEMORY ALLOY AND ITS APPLICATION IN ACTIVE AND PASSIVE VIBRATION CONTROL

1999, 29(1): 19-33. doi: 10.6052/1000-0992-1999-1-J1998-053

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Shape Memory Alloy (SMA) is one class of intelligent material system which has shown broad application area. Vibration control of structures using SMA material is one of important research direction which is well-shown applicable value of this advanced material. In this paper, a brief introduction of the main mechanical behavior of SMA including the shape memory effect and superelasticity is presented at first. The constitutive equations ultilized in describing the mechanical behavior of SMA are also review...

RECENT DEVELOPMENTS IN MODELING OF RANDOM FATIGUE CRACK GROWTH

1999, 29(1): 34-42. doi: 10.6052/1000-0992-1999-1-J1998-054

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Since Virkler et al. published their experimental results exposing the statistical nature of fatigue crack growth, many models of random fatigue crack growth have been proposed so far. In the present paper these models are summarized and reviewed concisely from both mathematical and physical points of view. The relationship among these models is pointed out. Some remarks on the further research need are also given.

ADVANCES IN STOCHASTIC THEORY OF FATIGUE DAMAGE ACCUMULATION

1999, 29(1): 43-65. doi: 10.6052/1000-0992-1999-1-J1998-055

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In this paper, the randomness of fatigue loading, fatigue stress, fatigue life and fatigue strength are clearly classified. Then, typical accumulative damage rules developed in the history of fatigue theory and still employed currently are systematically analysed according to the mechanism of mechanics-probability and the usage range. Two different probabilistic interpretations about fatigue damage accumulation, i.e., the stochastic nature of damage developed in a single individual and the scatter of damage...

THE APPLICATIONS OF PIEZOELECTRIC MATERIALS ON SHAPE CONTROL AND VIBRATION CONTROL OF SMART STRUCTURES

1999, 29(1): 66-76. doi: 10.6052/1000-0992-1999-1-J1998-056

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This paper summarized the applications of piezoelectric materials on shape control and vibration control of smart structures. The relationships between mechanical and electrical properties on the surface of distributed piezoelectric membrane and the theories of distributed sensitivity/control and hybrid control were described. At first, piezoelectric materials and their phenomenon were elucidated; then the piezoelectric constitutive relations and the theories of mechanics and control on piezoelectric plate ...

APPLICATION AND DEVELOPMENT OF COMPUTATIONAL FLUID DYNAMICS IN STEELMAKING PROCESSES

1999, 29(1): 77-86. doi: 10.6052/1000-0992-1999-1-J1998-057

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The use of boundary conditions, material data etc., in Computational Fluid Dynamics (CFD) for steelmaking processes faced is reviewed. The research state of fluid flow and its related phenomena on ladle refining processes and continuous casting mold processes is emphatically discussed. It should be recognized that the aim of computerized modeling in steelmaking processes is not to get exact numerical values or detailed descriptions of a given process but, instead, to get an insight into the processes. It is...

REVIEW ON EXPERIMENTAL INVESTIGATION OF SEPARATED-AND-REATTACHING FLOW

1999, 29(1): 87-96. doi: 10.6052/1000-0992-1999-1-J1998-058

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Experimental investigations of separated-and-reattaching flow of several typical geometry configUrations have been reviewed, such as backward (or forthward) facing step, T-shape structure, axisymmetric bluff body, etc. Behaviors of separation flow field produced by. different models have been compared with each other, with respect to their intrinsic relation. The effect of flow parameters on the flow field were discussed, and some issues which should be solved and developed are presented.

THE NEW ADVANCES OF CRACKS DEVELOPMENT AND MECHANICAL PROPERTIES OF ROCK

1999, 29(1): 97-104. doi: 10.6052/1000-0992-1999-1-J1998-059

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This paper reviews the recent advances on cracks/defects development and its mechanical properties of rock, including micro-cracks/defects development and mechanical properties, the time-dependent cracks/defect development and the application of rock damage mechanics.

BIOMECHANICAL BASIS OF ERYTHROCYTE

1999, 29(1): 105-111. doi: 10.6052/1000-0992-1999-1-J1998-060

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Erythrocyte aggregation is a kind of non-specific cell-to-cell adhesion.Macroscopically,it is thermodynamical process bywhich 3-Dnetwork structure is gradually develpoed from disseparated single cells.And microscopically,it is a kind of macromolecule-involiving veak contaction between cell membranes.Models were reviewed on the biomechanism of aggregate formation.

BROWNIAN DYNAMICS SIMULATION OF MOLECULE MODELS IN POLYMER RHEOLOGY

1999, 29(1): 112-120. doi: 10.6052/1000-0992-1999-1-J1998-061

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The Brownian dynamics simulation method which is used to study the rheological properties of molecule models in polymer is described and the researches on this method are summarized. In general cases, the methods for the study of molecule models can be combinedwith the numerical methods for solving the conservation equations in fluid dynamics. Then, it is possible to use a molecule model to take the place of the constitutive equation in continuum mechanics for numerical simulation of complex flows of polyme...

PERIODIC ORBITS: A NEW LANGUAGE FOR NEURONAL DYNAMICS

1999, 29(1): 121-133. doi: 10.6052/1000-0992-1999-1-J1998-062

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A new nonlinear dynamical analysis is applied to complex behavior from neuronal systems. The conceptual foundation of this analysis is the abstraction of observed neuronal activities into a dynamical landscape characterized by a hierarchy of "unstable periodic orbits" (UPOs). UPOs are rigorously identified in data sets representative Of three different levels of organization in mammalian brain. An analysis based on UPOs affords a novel altermative method of decoding, periodicting, and controlling these neur...

1999, 29(1): 135-139. doi: 10.6052/1000-0992-1999-1-J1998-064

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1999, 29(1): 139-139. doi: 10.6052/1000-0992-1999-1-J1998-243

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1999, 29(1): 141-141. doi: 10.6052/1000-0992-1999-1-J1998-065

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1999, 29(1): 142-142. doi: 10.6052/1000-0992-1999-1-J1998-066

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1999, 29(1): 143-143. doi: 10.6052/1000-0992-1999-1-J1998-244

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1999 Vol. 29, No. 1

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