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Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 623-642 doi: 10.1007/s11709-021-0726-8

Abstract: reduction methods were combined to simulate a progressive failure in notched composite plates using a macro mechanics

Keywords: progressive failure     notched composite plate     Hashin failure criterion     macro mechanics approach     finite    

Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 25-26

Abstract:

This paper discusses the development of aeronautics and astronautics with mechanics, reveals the developmentof new branches of interconnected sciences in mechanics, describes the relations of flight mechanicswith aerodynamics, structure mechanics, general mechanics and automatic control, and introduces thenew branch of flight mechanics—flight dynamics of elastic vehicle.

Keywords: aerodynamics     structure mechanics     general mechanics     automatic control     flight mechanics     flight dynamics    

Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0702-6

Abstract: The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics by

Keywords: creep     life assessment     brazed joint     continuum damage mechanics     aeroengine recuperator    

Study of the mechanics of progressive collapse of FPB isolated beam-pier substructures

Jingcai ZHANG; Yong DING; Xinchun GUAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 718-728 doi: 10.1007/s11709-022-0815-3

Abstract: The horizontal stiffness of the isolated layer is reduced substantially by a friction pendulum bearing (FPB) toprotectthe structure from potential damages caused by earthquakes. However, horizontal stiffness is essential to progressive collapse resistance of structures. This paper presents a simplified model to assess the progressive collapse response of beam-pier substructure isolated by FPB. Progressive collapse resistance by flexural action of the beam and additional resistance owing to the horizontal restraining force was achieved. The influences of the equivalent radius and friction coefficient of the FPB, the applied axial force on the FPB, and span-depth ratio of the beam on the additional resistance were investigated. Simulations were conducted to verify the proposed model. The results show that progressive collapse resistance provided by horizontal restraining can be reduced as large as 46% and 88% during compressive arching action (CAA) and catenary action (CA), respectively. The equivalent radius of the FPB shows limited effect on the progressive collapse response of FPB isolated structures, but friction coefficient and applied axial force, as well as depth ratio of the beam, show significant influences on the additional progressive collapse resistance capacity. Finite element method (FEM) results are in good agreement with the result obtained by the proposed method.

Keywords: friction pendulum bearing     progressive collapse     horizontal stiffness     compressive arching action     catenary action    

Advances in structural mechanics of Chinese ancient architectures

YU Maohong, ODA Yoshiya, FANG Dongping, ZHAO Junhai

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1,   Pages 1-25 doi: 10.1007/s11709-008-0002-1

Abstract: The researches on the structural mechanics of ancient architectures show the different aspects of structureand mechanics.Systematical studies on the structural mechanics of ancient architectures have been carried out at Xihave in fact problems of structural strength and stability; the need for further studies on structural mechanics

Generalized Plastic Mechanics and Its Application

Zheng Yingren,Kong Liang

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 21-36

Abstract: development of geotechnical plasticity is reviewed and some problems of applying the classic plastic mechanicsBy giving up the three hypotheses, a generalized plastic potential theory can be obtained from solid mechanicsdirectly, and then the traditional plastic mechanics can be changed to a more generalized plastic mechanics, namely generalized plastic mechanics (GPM).

Keywords: geotechnical plastic mechanics     generalized plastic mechanics     plastic potential     yield surface     constitutive    

A computational toolbox for molecular property prediction based on quantum mechanics and quantitative

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 152-167 doi: 10.1007/s11705-021-2060-z

Abstract: In this paper, a framework combining quantum mechanics and quantitative structure-property relationship, a database is created for collections of basic molecular information; in the second step, quantum mechanics-basedcalculations are performed to predict quantum mechanics-based/derived molecular properties (pseudo experimental

Keywords: molecular property     quantum mechanics     quantitative structure-property relationship     heat of reaction    

Tsien and His Work on Mechanics

Tan Qingming

Strategic Study of CAE 2001, Volume 3, Issue 10,   Pages 1-6

Abstract: Tsien to modern mechanics and engineering sciences, especially his work on a series of key problems inaerodynamics, solid mechanics and jet propulsion, are introduced.many new branches of engineering sciences were established, such as engineering dybernetics, physical mechanics

Keywords: Hsue-Shen Tsien     mechanics     engineering sciences    

Analysis of actuating mechanics characteristics for a flexible miniature robot system

YU Lianzhi, YAN Guozheng, MA Guanying, ZAN Peng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 66-70 doi: 10.1007/s11465-008-0006-5

Abstract: The actuating mechanics characteristics of the robot are analyzed.

Keywords: calculation     consistent     endoscope inspection     electro-pneumatic     miniature endoscope    

Review and Prospect of Mechanics of Jointed Rock Masses and Its Applications

Xie Heping

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 31-38

Abstract:

Mechanics of jointed rock masses is a new branch derived from mining engineering and engineering mechanicsAimed at the practical problems in mining engineering, this paper reviews the recent developments in mechanicsof rock masses and its applications, including damage mechanics of rock masses and its applications,and fractal theory and applications of mechanics of rock masses.Moreover, a development tendency of mechanics of rock masses, i. e.

Keywords: mechanics of jointed rock masses     recent development     prospect    

Goryachkin’s agricultural mechanics

Vera CHINENOVA

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1,   Pages 87-94 doi: 10.1007/s11465-016-0378-x

Abstract:

The paper contributes to the development of applied mechanics by establishing a new discipline, namely, agricultural mechanics by academician Vasilii Prohorovich Goryachkin (1868–1935) who was an apprentice

Keywords: theory of mechanisms and machines     agricultural machinery engineering     agricultural mechanics    

A regularization scheme for explicit level-set XFEM topology optimization

Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 153-170 doi: 10.1007/s11465-019-0533-2

Abstract: Regularization of the level-set (LS) field is a critical part of LS-based topology optimization (TO) approaches. Traditionally this is achieved by advancing the LS field through the solution of a Hamilton-Jacobi equation combined with a reinitialization scheme. This approach, however, may limit the maximum step size and introduces discontinuities in the design process. Alternatively, energy functionals and intermediate LS value penalizations have been proposed. This paper introduces a novel LS regularization approach based on a signed distance field (SDF) which is applicable to explicit LS-based TO. The SDF is obtained using the heat method (HM) and is reconstructed for every design in the optimization process. The governing equations of the HM, as well as the ones describing the physical response of the system of interest, are discretized by the extended finite element method (XFEM). Numerical examples for problems modeled by linear elasticity, nonlinear hyperelasticity and the incompressible Navier-Stokes equations in two and three dimensions are presented to show the applicability of the proposed scheme to a broad range of design optimization problems.

Keywords: level-sets     XFEM     CutFEM     topology optimization     heat method     signed distance field     nonlinear structural mechanics     fluid mechanics    

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: The most common experimental methods of measuring material strength are the uniaxial compressive and tensile tests. Generally, shearing fracture model occurs in both the tests. Compressive strength is higher than tensile strength for a material. Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxial tension. In this work, a unified relation of material strength under uniaxial compression and tension is developed by correlating the shearing fracture angle in theory. This constitutive relation is quantitatively illustrated by a function for analyzing the material strength from shear fracture angle. A computational simulation is conducted to validate this theoretical function. It is full of interest to give a scientific illustration for designing the high-strength materials and engineering structures.

Keywords: strength     fracture     mechanics    

Computational methods for fracture in rock: a review and recent advances

Ali JENABIDEHKORDI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 273-287 doi: 10.1007/s11709-018-0459-5

Abstract: which can be found elsewhere but particularly address their potential in modelling fracture in rock mechanics

Keywords: numerical modelling     method development     rock mechanics     fractured rock     rock fracturing    

Particle swarm optimization model to predict scour depth around a bridge pier

Shahaboddin SHAMSHIRBAND, Amir MOSAVI, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 855-866 doi: 10.1007/s11709-020-0619-2

Abstract: Scour depth around bridge piers plays a vital role in the safety and stability of the bridges. The former approaches used in the prediction of scour depth are based on regression models or black box models in which the first one lacks enough accuracy while the later one does not provide a clear mathematical expression to easily employ it for other situations or cases. Therefore, this paper aims to develop new equations using particle swarm optimization as a metaheuristic approach to predict scour depth around bridge piers. To improve the efficiency of the proposed model, individual equations are derived for laboratory and field data. Moreover, sensitivity analysis is conducted to achieve the most effective parameters in the estimation of scour depth for both experimental and filed data sets. Comparing the results of the proposed model with those of existing regression-based equations reveal the superiority of the proposed method in terms of accuracy and uncertainty. Moreover, the ratio of pier width to flow depth and ratio of 50 (mean particle diameter) to flow depth for the laboratory and field data were recognized as the most effective parameters, respectively. The derived equations can be used as a suitable proxy to estimate scour depth in both experimental and prototype scales.

Keywords: scour depth     bridge design and construction     particle swarm optimization     computational mechanics     artificial    

Title Author Date Type Operation

Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Journal Article

Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Journal Article

Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Journal Article

Study of the mechanics of progressive collapse of FPB isolated beam-pier substructures

Jingcai ZHANG; Yong DING; Xinchun GUAN

Journal Article

Advances in structural mechanics of Chinese ancient architectures

YU Maohong, ODA Yoshiya, FANG Dongping, ZHAO Junhai

Journal Article

Generalized Plastic Mechanics and Its Application

Zheng Yingren,Kong Liang

Journal Article

A computational toolbox for molecular property prediction based on quantum mechanics and quantitative

Journal Article

Tsien and His Work on Mechanics

Tan Qingming

Journal Article

Analysis of actuating mechanics characteristics for a flexible miniature robot system

YU Lianzhi, YAN Guozheng, MA Guanying, ZAN Peng

Journal Article

Review and Prospect of Mechanics of Jointed Rock Masses and Its Applications

Xie Heping

Journal Article

Goryachkin’s agricultural mechanics

Vera CHINENOVA

Journal Article

A regularization scheme for explicit level-set XFEM topology optimization

Markus J. GEISS, Jorge L. BARRERA, Narasimha BODDETI, Kurt MAUTE

Journal Article

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Journal Article

Computational methods for fracture in rock: a review and recent advances

Ali JENABIDEHKORDI

Journal Article

Particle swarm optimization model to predict scour depth around a bridge pier

Shahaboddin SHAMSHIRBAND, Amir MOSAVI, Timon RABCZUK

Journal Article