力学进展

Advances in formation mechanism and dissociation kinetics of gas hydrate in sediments

Qingping LI

2011, 41(1): 1-14. doi: 10.6052/1000-0992-2011-1-lxjzJ2009-065

Abstract(2162)

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Abstract:
The study on the formation of gas hydrate in deposit is mainly summarized. Firstly, the formation mechanism and study advances of bulk gas hydrate, including nucleation mechanism, armor effect and memory effect etc., are simply introduced. Secondly, the difficult and advances in the formation of gas hydrate with low-solubility gases such as methane, the effects of main factors such as pore size on the formation of gas hydrate in deposit are summarized. Thirdly, the main mathematical models on the kinetics of gas hydrate formation are simply introduced. At last, several study issues need to be studied further are highlighted.

Mechanical properties of macro-scale carbon nanotube assemblies and their applications to polymer nanocomposites

2011, 41(1): 15-25. doi: 10.6052/1000-0992-2011-1-lxjzJ2010-098

Abstract(3484)

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Abstract:
As one of the classical one dimensional (1D) nanoscale structures, carbon nanotubes (CNTs) possess remarkable mechanical, electrical and thermal properties. During the past years, considerable attentions have been drawn to utilize individual CNTs for high performance engineering materials. To this end, the production of macroscopic architectures based on the assembled CNTs with controlled orientation and configuration become an important step towards practical applications. Herein, we introduce some new developments on producing 1D CNT fibers, two-dimensional (2D) CNT films/sheets, and three-dimensional (3D) vertically aligned CNT arrays or CNT foams. The mechanical performance will be mainly concentrated, especially when bring these macro-scale CNT assemblies into polymer matrices as nanocomposites. The potential applications will be prospected in this review.

A Review of the Research on Blade Flutter in Turbomachinery

Hou Anping

2011, 41(1): 26-38. doi: 10.6052/1000-0992-2011-1-lxjzJ2009-157

Abstract(2803)

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Abstract:
Aeroelastic stability in the form of blade flutter is a major concern for designers in the field of turbomachinery. This paper presents a review of the research and development on blade flutter models, including unsteady aerodynamic modeling, structural modeling and flutter prediction methods. Based on the introduction of these models, the fundamental mechanism and effects of different treatments are discussed. In the end, some questions about the research of flutter and the works about fluid-solid coupling model are pointed out, which should be paid attention to in future.

Sensor deployment for structural health monitoring and their evaluation

2011, 41(1): 39-50. doi: 10.6052/1000-0992-2011-1-lxjzJ2009-093

Abstract(2582)

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Recent progress of investigations on sensor placement methods and their evaluation criteria in structural health monitoring are critically reviewed in the paper. Existing influential sensor placement methods are analyzed with emphasize on exposing their mathematical connections and differences, in particular, the relationship between the Effective Independence method and the Modal Kinetic Energy method, the connections between the Effective Independence method and the QR decomposition method and MinMAC method, are discussed in details. Furthermore, a ladder structure is employed as a model to compare the discussed sensor placement methods and traditional five evaluation criteria for sensor placement methods. Finally, an evaluation criterion proposed by the author is discussed through its connection with two traditional evaluation criteria.

PROGRESS IN MECHANIC PROPERTY AND DESIGN THEORY OF ELEMENTARY STRUTURE OF REACTIVE POWDER CONCRETE (RPC)*

2011, 41(1): 51-59. doi: 10.6052/1000-0992-2011-1-lxjzJ2009-017

Abstract(2490)

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Abstract:
According to achievement from theory, numerical modeling and experiment, in the paper a comparatively detail review is done to research progress in basic mechanical characteristic and design theory of elementary structure of RPC. On the base of analyzing investigation significance in engineering and theory towards reactive powder concrete, the author introduces basic mechanic characteristic of RPC specimen, influence of different components in concrete on mechanic characteristic of specimen, mechanic property in the condition of dynamic loading, design theory of RPC elementary structure, and probes into flaw and problem needed imperatively to solve. It is indicate that design theory of RPC elementary structure and failure characteristic of RPC frame in longer span of future is significant research points.

2011, 41(1): 60-78. doi: 10.6052/1000-0992-2011-1-lxjzJ2009-174

Abstract(2415)

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*Recent advances in liquid-filled tank dynamics and control

2011, 41(1): 79-92. doi: 10.6052/1000-0992-2011-1-lxjzJ2010-054

Abstract(2596)

PDF(1514)

Abstract:
The engineering application background of liquid-filled tank dynamics and control is presented. Recent advances in liquid-filled tank dynamics and control are systematically reviewed in terms of the following three aspects, i.e. liquid sloshing dynamics, liquid sloshing equivalent mechanical model and multi-body dynamics and control for liquid-filled tanks. Liquid sloshing dynamics in tanks are overviewed from analytical methods to numerical methods. In the part of multi-body system dynamics and control, the research progresses for vehicle and ship tank system dynamics and liquid-filled spacecraft dynamics and control are provided. Finally, key topics for further research are pointed out.

STRESSES,SINGULARITIES，AND A COMPLEMENTARYENERGY PRINCIPLE FOR LARGE STRAIN ELASTICITY

Gao Yuchen

2011, 41(1): 93-113. doi: 10.6052/1000-0992-2011-1-lxjzJ2011-004

Abstract(2440)

PDF(5443)

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Zhang Wei

2011, 41(1): 114-119. doi: 10.6052/1000-0992-2011-1-lxjzJ2010-138

Abstract(2454)

PDF(1084)

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Wang Minzhong

2011, 41(1): 120-120. doi: 10.6052/1000-0992-2011-1-lxjzJ2010-127

Abstract(1806)

PDF(887)

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A brief summary of the Second Asian Conference on Mechanics of Functional Materials and Structure (ACMFMS 2010)

Chen Wei-Qiu

2011, 41(1): 121-121. doi: 10.6052/1000-0992-2011-1-lxjzJ2011-016

Abstract(1944)

PDF(793)

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2011 Vol. 41, No. 1

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