力学进展 - 开云棋牌官方

RESEARCH ADVANCES IN THE STUDY OF HEAT WAVES

1992, 22(4): 433-448. doi:10.6052/1000-0992-1992-4-J1992-043

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As is known, the heat transportation follows the classical Fourier's law, and the temperature distribution is governed by a parabollic equation. This fact leads to a paradox, the heat pulse propagates at an infinite speed. In the normal condition, this "paradox" may be explained away by the rapid decay of heat waves. However, under certain conditions when the relevant time scale is extremely small such as in the cases of thermo-explosion, nuclear fusion, very fast chemical reaction and the interaction of hi...

YIELDING AND PLASTIC DEFORMATION OF SOLID POLYMERS

1992, 22(4): 449-463. doi:10.6052/1000-0992-1992-4-J1992-044

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Over recent years a tremendous interest has been shown in the yielding and plastic deformation of polymers. The studies of this area in the last two decades or so are reviewed. The main discussions are focused on three parts: the first is the yielding criteria of isotropic and anisotropic polymers, the second is concerned with the theories of thermally activated yielding and plastic deformation, and the third is an outline of stress-strain behaviour and related constitutive relations. While reviewing variou...

MECHANICAL BEHAVIOUR OF INTERFACES IN FIBER REINFORCED COMPOSITE MATERIALS

1992, 22(4): 464-478. doi:10.6052/1000-0992-1992-4-J1992-045

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The studies on the mechanical behaviour and failure mechanism of material's interfaces arc on the frontier of materials science, mechanics and physics. Interface problems of composites are more complicated. This paper discusses the general mechanical characteristics of fiber composite interfaces, together with the author's work. The following aspects are described: the characteristics of composite interfaces; models and theories of mechanics on composite interfaces; experimental investigation of mechanical ...

THE PRESENT STATE AND THE TREND OF FINITE TIME THERMO本文从以下几个方面介绍了能量系统(含热机、制冷机、热泵等热力机械和其他有关一般热力过程、化学反应过程)有限时间热力学的研究现状:牛顿定律热力系统的研究;热阻和其他不可逆损失模型影DYNAMICS FOR ENERGY SYSTEMS

1992, 22(4): 479-487. doi:10.6052/1000-0992-1992-4-J1992-046

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This paper presents a review on the finite time thermodynamics for energy systems (including heat engines, refrigerators, heat pumps, chemical reactions and some other processes) with respect to the following aspects: the study of Newton's law systems, an analysis of thermal resistance and other irreversible loss models as well as finite reservoirs and source-type reservoirs, and finally, the application of thermodyliamic machinery design and its evaluation.

GENERAL MECHANISM OF TURBULENCE AND ITS APPLICATIONS

1992, 22(4): 489-495. doi:10.6052/1000-0992-1992-4-J1992-047

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In this paper, some important mechanisms of turbulence proposed in literature are reviewed, which include Brown-Roshko's large-scale vortex structure developed in the mixing shear flow, Perry and Chong's 'A' vortex in turbulent boundary layer and the author's general mechanism of turbulence in 3-dimensional turbulent flow with respect to the vortex structure of pulsative vorticity convection and diffusion. The criterion is proposed for distinguishing the flow patterns. The bursting phenomenon near the wall ...

A STUDY ON THE OPTICAL FIBRE INTELLIGENT COMPOSITE MATERIALS AND ITS MONITORING SYSTEM

1992, 22(4): 496-502. doi:10.6052/1000-0992-1992-4-J1992-048

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This paper gives an overview on the new smart materials such as electro-rheological fluids and the ultra-advanced intelligent composite material as well as its principle and future prospects.The compofites with embedded optical fibres-the smart skins are introduced and the principle,feasibility and application of the fibre optical monitoring system are discussed. Surveys on the current and further studies on that field are presented.

1992, 22(4): 503-526. doi:10.6052/1000-0992-1992-4-J1992-049

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1992, 22(4): 527-542. doi:10.6052/1000-0992-1992-4-J1992-050

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1992, 22(4): 543-552. doi:10.6052/1000-0992-1992-4-J1992-051

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1992, 22(4): 553-563. doi:10.6052/1000-0992-1992-4-J1992-052

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1992, 22(4): 564-575. doi:10.6052/1000-0992-1992-4-J1992-053

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1992, 22(4): 573-573. doi:10.6052/1000-0992-1992-4-J1992-054

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1992 Vol. 22, No. 4

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