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

Frontiers of Mechanical Engineering 2021, 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    

The Review of Ascertainable Fatigue Cumulative Damage Rule

Yang Xiaohua,Yao Weixing,Duan Chengmei

Strategic Study of Chinese Academy of Engineering 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    

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

Zhou Ning,Ren Huiqi,Shen Zhaowu,Liu Ruichao

Strategic Study of Chinese Academy of Engineering 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    

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    

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    

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

Frontiers of Structural and Civil Engineering   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    

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    

Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Strategic Study of Chinese Academy of Engineering 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    

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 Chinese Academy of Engineering 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    

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 142-149 doi: 10.1007/s11465-014-0292-z

Abstract: On the grounds that the classical continuum theory cannot accurately predict the mechanical behavior

Keywords: continuum theory     differential quadrature method     nanorod     longitudinal vibration    

Tsien and His Work on Mechanics

Tan Qingming

Strategic Study of Chinese Academy of Engineering 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    

The damage evolution behavior of polypropylene fiber reinforced concrete subjected to sulfate attack

Frontiers of Structural and Civil Engineering   Pages 316-328 doi: 10.1007/s11709-022-0810-8

Abstract: To study the damage evolution behavior of polypropylene fiber reinforced concrete (PFRC) subjected toeffect of sulfate attack relative to time and fiber hybridization were analyzed and the compression damageThe initial damage factor of hybrid PFRC was −0.042 and −0.056 respectively after 150 d of corrosion,

Keywords: polypropylene fiber reinforced concrete     sulfate attack     damage evolution behavior     acoustic emission     damage factor    

Liquefaction-induced damage evaluation of earth embankment and corresponding countermeasure

Frontiers of Structural and Civil Engineering   Pages 1183-1195 doi: 10.1007/s11709-022-0848-7

Abstract: Liquefaction of sandy soils is a big threat to the stability and the safety of an earth embankment laid on saturated soils. A large number of liquefaction-induced damages on embankment due to different types of earthquakes have been reported worldwide. In this research, the dynamic behaviors of earth embankment and the reinforcement effects of grouting as remediation method, subjected to moderate earthquake EQ1 and strong earthquake EQ2, were numerically investigated. The seismic behaviors of ground composed of cohesionless sandy soil and cohesive clayey soil were uniformly described by the cyclic mobility (CM) model, which is capable of describing accurately the mechanical property of the soil due to monotonic and cyclic loadings by accounting for stress-induced anisotropy, over-consolidation, and soil structure. It is known from the numerical investigation that the embankment would experience destructive deformation, and that the collapse mode was closely related to the properties of input seismic motion because high intensities and long durations of an earthquake motion could lead to significant plastic deformation and prolonged soil liquefaction. Under the strong seismic loading of EQ2, a circular collapse surface, combined with huge settlement and lateral spread, occurred inside the liquefication zone and extended towards the embankment crest. In contrast, in moderate earthquake EQ1, upheaval was observed at each toe of the embankment, and instability occurred only in the liquefied ground. An anti-liquefaction remediation via grouting was determined to significantly reduce liquefaction-induced deformation (settlement, lateral spreading, and local uplift) and restrain the deep-seated circular sliding failure, even though the top sandy soil liquefied in both earthquakes. When the structure was subjected to EQ2 motion, local failure occurred on the embankment slope reinforced with grouting, and thus, an additional appropriate countermeasure should be implemented to further strengthen the slope. For both input motions, the surface deformation of the considered embankment decreased gradually as the thickness of reinforcement was increased, although the reinforcement effect was no longer significant once the thickness exceeded 6 m.

Keywords: dynamic response     earth embankment     damage pattern     liquefaction     ground improvement    

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

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

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

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

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Journal Article

Tsien and His Work on Mechanics

Tan Qingming

Journal Article

The damage evolution behavior of polypropylene fiber reinforced concrete subjected to sulfate attack

Journal Article

Liquefaction-induced damage evaluation of earth embankment and corresponding countermeasure

Journal Article