力学进展

1993, 23(4): 433-467. doi: 10.6052/1000-0992-1993-4-J1993-042

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Material failure process under dynamic loading is systematically reviewed and studied. Recent research works on the "nucleation, growth and coalescence" of micro-defects are introduced and discussed. Comparisons and comments on different dynamic failure models are also presented.

MICROSCOPIC PROCESS AND DESCRIPTION FOR THE INITIATION AND PROPAGATION OF SHORT FATIGUE CRACKS

1993, 23(4): 468-486. doi: 10.6052/1000-0992-1993-4-J1993-043

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The progress in the research on short fatigue cracks has been reviewed in this paper, which covers the characteristics of short cracks, the microscopic process of the initiation and propagation of short cracks and the models for the description of short crack behaviour.

NUMERICAL SIMULATIONS OF HYPERVELOCITY IMPACTS

1993, 23(4): 487-492. doi: 10.6052/1000-0992-1993-4-J1993-044

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This paper concisely introduces and summarizes the current status of the research on numerical simulations of hypervelocity impacts, and discusses the progress made and the problems existing both in numerical schemes and physical models.

BIFURCATION AND ITS NUMERICAL METHODS

1993, 23(4): 493-502. doi: 10.6052/1000-0992-1993-4-J1993-045

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The development of numerical methods for bifurcation problems in recent years is reviewed together with author's recent contributions.Two application examples are given.

STOCHASTIC APPROACHES FOR THE ANALYSIS OF FATIGUE CRACK GROWTH

1993, 23(4): 503-509. doi: 10.6052/1000-0992-1993-4-J1993-046

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Stochastic approaches for the analysis of fatigue crack growth developed in recent years are reviewed, including the stochastic modelling and statistical analysis method for fatigue crack growth. They provide a powerful tool for studying the fatigue life and reliability of metallic components

ANALYSIS OF DEFORMATION AND DAMAGE FOR CONCRETE

1993, 23(4): 510-519. doi: 10.6052/1000-0992-1993-4-J1993-047

Abstract(1913)

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The state-of-the art of the research of constitutive theory for concrete is presented in this paper. Physical mechanism of deformation and damage of concrete and several important constitutive phenomena are analyzed. Descriptive methods to model damage, unilateral behavior and shear dilatation effect etc. of concrete are also discussed. Five damage constitutive models for concrete are introduced.

THE RESEARCH PROGRESS IN FAILURE THEORY OF CONCRETE

1993, 23(4): 520-529. doi: 10.6052/1000-0992-1993-4-J1993-048

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A brief analysis of material properties, failure , characteristics and mechanism of concrete and a survey of the applications of damage mechanics and fracture mechanics in studies on concrete are presented here. Emphasis is placed on the new advances in the main research issues of concrete failure. The future research trends and opportunities in this field arc outlined in the final part of the paper. A brief analysis of material properties, failure , characteristics and mechanism of concrete and a survey of...

ADVANCElN RESEARCH FOR DYNAMIC BUCKLING OF STRUCTURES

1993, 23(4): 530-539. doi: 10.6052/1000-0992-1993-4-J1993-049

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The achievement and advance in the research for vibration buckling and impact buckling of structures is systematically reviewed. The dynamic buckling under step loadling, which is regarded as the extreme case in the impact buckling, is expounded. On the discussion of a dynamic buckling,the criteria and analytical methods are also discussed in general terms.

ORDER-REDUCTION TECHNIQUES FOR CONTROL OF ELASTIC STRUCTURES

1993, 23(4): 540-546. doi: 10.6052/1000-0992-1993-4-J1993-050

Abstract(1603)

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With the development of the space technique, more and more large flexible structures are being used, and order-reduction becomes an important link for the control of these mechanical systems. The paper reviews some order-reduction techniques widely used in recent years.

THE DEVELOPMENT AND PROSPECT OF BIOMECHANICAL RESEARCH IN DENTISTRY

1993, 23(4): 547-559. doi: 10.6052/1000-0992-1993-4-J1993-051

Abstract(1789)

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This article reviews the development and current status of dental biomechanical research, in China, together with its applications in the clinical area and its prospect.

1993, 23(4): 560-572. doi: 10.6052/1000-0992-1993-4-J1993-052

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1993, 23(4): 574-574. doi: 10.6052/1000-0992-1993-4-J1993-053

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1993 Vol. 23, No. 4

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