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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    

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The Review of Ascertainable Fatigue Cumulative Damage Rule

Yang Xiaohua,Yao Weixing,Duan Chengmei

Strategic Study of CAE 2003, Volume 5, Issue 4,   Pages 81-87

Abstract:

Famous Miner - Palmgren linear damage rule has been presented for 70 years.Fatigue cumulative damage rule has been perfecting and developing.Based on the characteristics of fatigue damage and cumulative damage rule, this paper divided the rulesOne is linear cumulative damage rule. The other is non-linear cumulative damage rule (NLCDR).the degradation of materials performances; NLCDR based on continuous damage mechanics; NLCDR considering

Keywords： fatigue     linear and nonlinear     cumulative damage     damage mechanics     energy    

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Experimental Study on the Damage Effect of Projectile Explosive in Multi-layer Medium

Zhou Ning,Ren Huiqi,Shen Zhaowu,Liu Ruichao

Strategic Study of CAE 2006, Volume 8, Issue 8,   Pages 56-60

Abstract: shape，volume and area of dent in multi-layered target created by kinetic projectile explosive, the damageThe damage zoning was founded in multi-layered target.The experimental data were analyzed, then relation curves of diversified damage parameter with blastingThrough those relation curves, the blasting depth corresponding to the optimal damage effect can be foundThis method can generalize to other blasting damage effect analysis.

Keywords： mechanics of explosion     multi-layer medium     dimensional analysis     damage zoning    

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Design and modeling of continuum robot based on virtual-center of motion mechanism

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0739-6

Abstract: Continuum robot has attracted extensive attention since its emergence.Thus, it is well suited for use as a continuum robot joint.Therefore, a design method for continuum robots based on the VCM mechanism is proposed in this study.Second, the VCM mechanism is combined to form a flexural joint suitable for the continuum robot.Furthermore, the motion performance of the designed continuum robot is evaluated.

Keywords： VCM mechanism     continuum robot     flexural joint     pseudo-rigid body model     cable-driven    

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Comprehensive kinetostatic modeling and morphology characterization of cable-driven continuum robots

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0756-0

Abstract: The cable-driven continuum robot (CDCR) with twin-pivot compliant mechanisms, which is enabled with flexibleFinally, a compact continuum robot system is integrated to experimentally validate the proposed kinetostaticThe compact continuum robot system could be considered a novel solution to perform in-situ maintenance

Keywords： kinetostatic modeling     morphology characterization     variable friction     continuum robots     in-situ   

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Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 143-157 doi: 10.1007/s11709-016-0377-3

Abstract: The purpose is to present a new shear connector element based on the theory of continuum plasticity.

Keywords： shear walls     wall diaphragms     finite element modelling     plastic shear connector     analytical modelling     experimental comparison    

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Modeling water and heat transfer in soil-plant-atmosphere continuum applied to maize growth under plastic

Meng DUAN, Jin XIE, Xiaomin MAO

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 2,   Pages 144-161 doi: 10.15302/J-FASE-2019258

Abstract: previous work modeling crop growth (CropSPAC) and water and heat transfer in the soil-plant-atmosphere continuum

Keywords： film mulching     growth stage     leaf area index     maize growth     water and heat transfer    

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Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 669-685 doi: 10.1007/s11709-023-0963-0

Abstract: This approach combines a minimum compliance objective function with a hybrid truss-continuum model.

Keywords： bi-directional evolutionary structural optimization     steel-reinforced concrete     concrete stress     reinforcement method     hybrid model    

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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 mechanicsaddition, the effects of mechanical properties and different stacking sequences on the propagation of damage

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

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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    

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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
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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    

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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    

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Numerical simulation of three dimensional concrete printing based on a unified fluid and solid mechanics

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 4,   Pages 491-515 doi: 10.1007/s11709-024-1082-2

Abstract: Deformation control constitutes one of the main technological challenges in three dimensional (3D) concrete printing, and it presents a challenge that must be addressed to achieve a precise and reliable construction process. Model-based information of the expected deformations and stresses is required to optimize the construction process in association with the specific properties of the concrete mix. In this work, a novel thermodynamically consistent finite strain constitutive model for fresh and early-age 3D-printable concrete is proposed. The model is then used to simulate the 3D concrete printing process to assess layer shapes, deformations, forces acting on substrate layers and prognoses of possible structural collapse during the layer-by-layer buildup. The constitutive formulation is based on a multiplicative split of the deformation gradient into elastic, aging and viscoplastic parts, in combination with a hyperelastic potential and considering evolving material properties to account for structural buildup or aging. One advantage of this model is the stress-update-scheme, which is similar to that of small strain plasticity and therefore enables an efficient integration with existing material routines. The constitutive model uses the particle finite element method, which serves as the simulation framework, allowing for modeling of the evolving free surfaces during the extrusion process. Computational analyses of three printed layers are used to create deformation plots, which can then be used to control the deformations during 3D concrete printing. This study offers further investigations, on the structural level, focusing on the potential structural collapse of a 3D printed concrete wall. The capability of the proposed model to simulate 3D concrete printing processes across the scales—from a few printed layers to the scale of the whole printed structure—in a unified fashion with one constitutive formulation, is demonstrated.

Keywords： particle finite element method     3D concrete printing     multiplicative split     additive manufacturing     elasto-viscoplasticity    

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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    

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Title Author Date Type Operation

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

Journal Article

The Review of Ascertainable Fatigue Cumulative Damage Rule

Yang Xiaohua,Yao Weixing,Duan Chengmei

Journal Article

Experimental Study on the Damage Effect of Projectile Explosive in Multi-layer Medium

Zhou Ning,Ren Huiqi,Shen Zhaowu,Liu Ruichao

Journal Article

Design and modeling of continuum robot based on virtual-center of motion mechanism

Journal Article

Comprehensive kinetostatic modeling and morphology characterization of cable-driven continuum robots

Journal Article

Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

Journal Article

Modeling water and heat transfer in soil-plant-atmosphere continuum applied to maize growth under plastic

Meng DUAN, Jin XIE, Xiaomin MAO

Journal Article

Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Journal Article

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

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

Numerical simulation of three dimensional concrete printing based on a unified fluid and solid mechanics

Journal Article

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

Jingcai ZHANG; Yong DING; Xinchun GUAN

Journal Article