• Complex
  • Title
  • Author
  • Keyword
  • Abstract
  • Scholars
Search
High Impact Results & Cited Count Trend for Year Keyword Cloud and Partner Relationship

Query:

学者姓名:王刚锋

Refining:

Source

Submit Unfold

Co-Author

Submit Unfold

Language

Submit

Clean All

Export Sort by:
Default
  • Default
  • Title
  • Year
  • WOS Cited Count
  • Impact factor
  • Ascending
  • Descending
< Page ,Total 10 >
Cylindrical indentation of an elastic bonded layer with surface tension EI Scopus SCIE
期刊论文 | 2019 , 65 , 597-613 | Applied Mathematical Modelling
Abstract&Keyword Cite

Abstract :

Surface tension is a prominent factor for the deformation of solids at micro-/nano-scale. This paper investigates the effects of surface tension on the two-dimensional contact problems of an elastic layer bonded to the rigid substrate. Under the plane strain assumption, the elastic field induced by a uniformly distributed pressure is formulated by applying the Fourier integral transform, and the limiting process leading to the solutions for a line force brings the requisite surface Green's function. For the indentation of an elastic layer by a rigid cylinder, the corresponding singular integral equation is derived, and subsequently solved by using an effective numerical method based on Gauss–Chebyshev quadrature formula. It is found that the existence of surface tension strongly enhances the stiffness of the elastic layer and significantly affects the distribution of contact pressure, when the size of contact region is comparable to the elastocapillary length. In addition, an approximate relationship between external load and half-width of contact is generalized in an explicit form, which is useful and convenient for practical applications. © 2018 Elsevier Inc.

Keyword :

Contact Mechanics Contact pressures Cylindrical indentation Deformation of solids Elastic layers Fourier integral transforms Quadrature formula Singular integral equations

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yuan, Weike , Wang, Gangfeng . Cylindrical indentation of an elastic bonded layer with surface tension [J]. | Applied Mathematical Modelling , 2019 , 65 : 597-613 .
MLA Yuan, Weike 等. "Cylindrical indentation of an elastic bonded layer with surface tension" . | Applied Mathematical Modelling 65 (2019) : 597-613 .
APA Yuan, Weike , Wang, Gangfeng . Cylindrical indentation of an elastic bonded layer with surface tension . | Applied Mathematical Modelling , 2019 , 65 , 597-613 .
Export to NoteExpress RIS BibTex
Solvothermal synthesis of highly crystalline SnO2 nanoparticles for flexible perovskite solar cells application EI SCIE Scopus
期刊论文 | 2019 , 234 , 311-314 | MATERIALS LETTERS
Abstract&Keyword Cite

Abstract :

Flexible perovskite solar cells are arising researchers' attentions due to their promising potential applications. In this letter, homogeneous and highly crystalline SnO2 nanoparticles are successfully synthesized by a solvothermal method, which are then employed to deposit high quality electron transport layers by spin coating and baking at a temperature as low as 150 degrees C. The prepared SnO2 layer has a homogenous and flat surface without any pinholes. The resulting flexible perovskite solar cell shows a high power conversion efficiency of 13.90%, which is mainly attributed to the good transmittance, efficient electron extraction and hole blocking ability of the SnO2 electron transport layer. (C) 2018 Elsevier B.V. All rights reserved.

Keyword :

Solvothermal Solar energy materials Nanoparticles

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Xie, Haixia , Yin, Xingtian , Chen, Peng et al. Solvothermal synthesis of highly crystalline SnO2 nanoparticles for flexible perovskite solar cells application [J]. | MATERIALS LETTERS , 2019 , 234 : 311-314 .
MLA Xie, Haixia et al. "Solvothermal synthesis of highly crystalline SnO2 nanoparticles for flexible perovskite solar cells application" . | MATERIALS LETTERS 234 (2019) : 311-314 .
APA Xie, Haixia , Yin, Xingtian , Chen, Peng , Liu, Jie , Yang, Chenhui , Que, Wenxiu et al. Solvothermal synthesis of highly crystalline SnO2 nanoparticles for flexible perovskite solar cells application . | MATERIALS LETTERS , 2019 , 234 , 311-314 .
Export to NoteExpress RIS BibTex
Indentation load–depth relation for an elastic layer with surface tension EI Scopus
期刊论文 | 2018 | Mathematics and Mechanics of Solids
Abstract&Keyword Cite

Abstract :

The load–depth relation is a fundamental requisite in nanoindentation tests for thin layers; however, the effects of surface tension are seldom included. This paper concerns micro-/nano-sized indentation by a rigid sphere of a bonded elastic layer. The surface Green’s function with the incorporation of surface tension is first derived by applying the Hankel integral transform, and subsequently used to formulate the governing integral equation for the axisymmetric contact problem. By using a numerical method based on the Gauss–Chebyshev quadrature formula, the singular integral equation is solved efficiently. Several numerical results are presented to investigate the influences of surface tension and layer thickness on contact pressure, surface deformation, and bulk stress. It is found that when the size of contact is comparable to the ratio of surface tension to elastic modulus, the contribution of surface tension to the load–depth relation becomes quite prominent. With the help of a parametric study, explicit general expressions for the indentation load–depth relation as well as the load–contact radius relation are summarized, which provide the groundwork for practical applications. © 2018, The Author(s) 2018.

Keyword :

Axisymmetric contact problem Bonded elastic layer Contact Mechanics Elastic layers Hankel integral transform Nanoindentation tests Singular integral equations Surface deformation

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Shaoheng , Yuan, Weike , Ding, Yue et al. Indentation load–depth relation for an elastic layer with surface tension [J]. | Mathematics and Mechanics of Solids , 2018 .
MLA Li, Shaoheng et al. "Indentation load–depth relation for an elastic layer with surface tension" . | Mathematics and Mechanics of Solids (2018) .
APA Li, Shaoheng , Yuan, Weike , Ding, Yue , Wang, Gangfeng . Indentation load–depth relation for an elastic layer with surface tension . | Mathematics and Mechanics of Solids , 2018 .
Export to NoteExpress RIS BibTex
Analytic relations for two-dimensional indentations with surface tension EI SCIE Scopus
期刊论文 | 2018 , 119 , 34-41 | MECHANICS OF MATERIALS
Abstract&Keyword Cite

Abstract :

Surface tension plays a significant role in micro- and nanoindentation tests. Based on the solution of a concentrated force acting on an elastic half-plane with surface tension, the two-dimensional indentations of an elastic half-plane by a cylindrical indenter, a wedge indenter and a flat-ended indenter are formulated, and by employing the Gauss-Chebyshev quadrature formula, the corresponding singular integral equations are numerically solved. For each indentation, the analytic solutions of two limit cases considering only bulk elasticity or surface tension are derived. Then through simple combinations of the results of two limit cases, the analytic relations between load and contact half-width or indent depth are formulated for the general case, and compared with the numerical results. The analytic relations established in this paper facilitate better characterization of mechanical properties of materials by micro/nanoindentation tests.

Keyword :

Contact Micro/nanoindentation Surface tension

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Long, Jianmin , Yuan, Weike , Chen, Wen et al. Analytic relations for two-dimensional indentations with surface tension [J]. | MECHANICS OF MATERIALS , 2018 , 119 : 34-41 .
MLA Long, Jianmin et al. "Analytic relations for two-dimensional indentations with surface tension" . | MECHANICS OF MATERIALS 119 (2018) : 34-41 .
APA Long, Jianmin , Yuan, Weike , Chen, Wen , Wang, Gangfeng . Analytic relations for two-dimensional indentations with surface tension . | MECHANICS OF MATERIALS , 2018 , 119 , 34-41 .
Export to NoteExpress RIS BibTex
Orientation-dependent deformation mechanisms of bcc niobium nanoparticles EI SCIE Scopus
期刊论文 | 2018 , 98 (20) , 1848-1864 | PHILOSOPHICAL MAGAZINE
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

Nanoparticles usually exhibit pronounced anisotropic properties, and a close insight into the atomic-scale deformation mechanisms is of great interest. In present study, atomic simulations are conducted to analyse the compression of bcc nanoparticles, and orientation-dependent features are addressed. It is revealed that surface morphology under indenter predominantly governs the initial elastic response. The loading curve follows the flat punch contact model in [1 1 0] compression, while it obeys the Hertzian contact model in [1 1 1] and [0 0 1] compressions. In plastic deformation regime, full dislocation gliding is dominated in [1 1 0] compression, while deformation twinning is prominent in [1 1 1] compression, and these two mechanisms coexist in [0 0 1] compression. Such deformation mechanisms are distinct from those in bulk crystals under nanoindentation and nanopillars under compression, and the major differences are also illuminated. Our results provide an atomic perspective on the mechanical behaviours of bcc nanoparticles and are helpful for the design of nanoparticle-based components and systems.

Keyword :

deformation twinning dislocation compression Nanoparticles

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Bian, J. J. , Yang, L. , Niu, X. R. et al. Orientation-dependent deformation mechanisms of bcc niobium nanoparticles [J]. | PHILOSOPHICAL MAGAZINE , 2018 , 98 (20) : 1848-1864 .
MLA Bian, J. J. et al. "Orientation-dependent deformation mechanisms of bcc niobium nanoparticles" . | PHILOSOPHICAL MAGAZINE 98 . 20 (2018) : 1848-1864 .
APA Bian, J. J. , Yang, L. , Niu, X. R. , Wang, G. F. . Orientation-dependent deformation mechanisms of bcc niobium nanoparticles . | PHILOSOPHICAL MAGAZINE , 2018 , 98 (20) , 1848-1864 .
Export to NoteExpress RIS BibTex
Spherical indentation on biological films with surface energy EI SCIE Scopus
期刊论文 | 2018 , 51 (29) | JOURNAL OF PHYSICS D-APPLIED PHYSICS
Abstract&Keyword Cite

Abstract :

Micro- and nano-indentations have been widely used to measure the mechanical properties of biological cells and tissues, but the direct application of the classical Hertzian contact model would lead to the overestimation of elastic modulus due to the influence of finite thickness and surface energy. In this work, we analyze spherical indentation of biological films, considering both large deformation and surface energy. The hyperelastic behavior of biological films is characterized by the neo-Hookean model, and the influence of surface energy is addressed through finite element simulation. Based on dimensional analysis, the explicit expressions of load-depth relation accounting for film thickness, large deformation and surface energy are achieved for bonded or non-bonded films. Under a specific load, the consideration of large deformation increases the indent depth, while the finite thickness of films tends to decrease the indent depth, compared to the linear elastic Hertzian solution. More importantly, surface energy evidently alters the load-depth relation for micro-/nano-indentations, which reduces the indent depth and makes the films seemingly stiffer. These results provide a fundamental relationship to accurately extract the mechanical properties of biological films from indentation tests.

Keyword :

biological film hyperelasticity surface energy indentation

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Ding, Yue , Yuan, Wei-Ke , Wang, Gang-Feng . Spherical indentation on biological films with surface energy [J]. | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (29) .
MLA Ding, Yue et al. "Spherical indentation on biological films with surface energy" . | JOURNAL OF PHYSICS D-APPLIED PHYSICS 51 . 29 (2018) .
APA Ding, Yue , Yuan, Wei-Ke , Wang, Gang-Feng . Spherical indentation on biological films with surface energy . | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (29) .
Export to NoteExpress RIS BibTex
Anisotropic Deformation in the Compressions of Single Crystalline Copper Nanoparticles SCIE Scopus
期刊论文 | 2018 , 8 (3) | CRYSTALS
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

Atomistic simulations are performed to probe the anisotropic deformation in the compressions of face-centred-cubic metallic nanoparticles. In the elastic regime, the compressive load-depth behaviors can be characterized by the classical Hertzian model or flat punch model, depending on the surface configuration beneath indenter. On the onset of plasticity, atomic-scale surface steps serve as the source of heterogeneous dislocation in nanoparticle, which is distinct from indenting bulk materials. Under [111] compression, the gliding of jogged dislocation takes over the dominant plastic deformation. The plasticity is governed by nucleation and exhaustion of extended dislocation ribbons in [110] compression. Twin boundary migration mainly sustain the plastic deformation under [112] compression. This study is helpful to extract the mechanical properties of metallic nanoparticles and understand their anisotropic deformation behaviors.

Keyword :

anisotropy nanoparticle compression dislocation

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Bian, Jianjun , Zhang, Hao , Niu, Xinrui et al. Anisotropic Deformation in the Compressions of Single Crystalline Copper Nanoparticles [J]. | CRYSTALS , 2018 , 8 (3) .
MLA Bian, Jianjun et al. "Anisotropic Deformation in the Compressions of Single Crystalline Copper Nanoparticles" . | CRYSTALS 8 . 3 (2018) .
APA Bian, Jianjun , Zhang, Hao , Niu, Xinrui , Wang, Gangfeng . Anisotropic Deformation in the Compressions of Single Crystalline Copper Nanoparticles . | CRYSTALS , 2018 , 8 (3) .
Export to NoteExpress RIS BibTex
Interaction of a screw dislocation with a bi-material interface in anti-plane couple stress elasticity EI SCIE Scopus
期刊论文 | 2018 , 23 (4) , 651-666 | MATHEMATICS AND MECHANICS OF SOLIDS
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

We analyze the contribution of couple stresses to the interaction between a screw dislocation and a bi-material interface. Using Fourier integral transforms, we develop analytical representations for the stress distributions in each of the adjoining materials as well as the interaction force acting on the dislocation. Our results are illustrated with several numerical examples, which indicate that couple stresses significantly influence the corresponding stress distributions and the mobility of the dislocation when the distance between the dislocation and the material interface remains below or near the characteristic length of the materials.

Keyword :

bi-material material interface screw dislocation Couple stress theory

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Gharahi, Alireza , Dai, Ming , Wang, Gang-Feng et al. Interaction of a screw dislocation with a bi-material interface in anti-plane couple stress elasticity [J]. | MATHEMATICS AND MECHANICS OF SOLIDS , 2018 , 23 (4) : 651-666 .
MLA Gharahi, Alireza et al. "Interaction of a screw dislocation with a bi-material interface in anti-plane couple stress elasticity" . | MATHEMATICS AND MECHANICS OF SOLIDS 23 . 4 (2018) : 651-666 .
APA Gharahi, Alireza , Dai, Ming , Wang, Gang-Feng , Schiavone, Peter . Interaction of a screw dislocation with a bi-material interface in anti-plane couple stress elasticity . | MATHEMATICS AND MECHANICS OF SOLIDS , 2018 , 23 (4) , 651-666 .
Export to NoteExpress RIS BibTex
Statistical contact model of rough surfaces: The role of surface tension EI SCIE Scopus
期刊论文 | 2018 , 138 , 217-223 | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Abstract&Keyword Cite

Abstract :

The sizes of most asperities on actual rough surfaces range from nanometers to microns. Recent investigations reveal that surface tension plays an important role in micro-/nano-sized contact. Therefore, in this paper, we address the influence of surface tension on the elastic contact of rough surfaces. Nayak's model is employed to describe rough surface with stochastic distribution of both heights and curvatures. As a fundament, we present the general relations of contact area and load as the function of indent depth for a single micro-/nano-sized asperity by accounting for surface tension. Based on the refined relations, we derive the general relations concerned in the contact of rough surfaces. Compared with the conventional multi-asperity contact models based on the Hertzian contact theory, the existence of surface tension decreases the real contact area and requires higher load to generate a given indent depth. It is found that the area of intimate contact is still approximately proportional to the external load, but the proportionality depends on the surface tension. (C) 2018 Elsevier Ltd. All rights reserved.

Keyword :

Rough surface Surface tension Contact

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yuan, Weike , Long, Jianmin , Ding, Yue et al. Statistical contact model of rough surfaces: The role of surface tension [J]. | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2018 , 138 : 217-223 .
MLA Yuan, Weike et al. "Statistical contact model of rough surfaces: The role of surface tension" . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 138 (2018) : 217-223 .
APA Yuan, Weike , Long, Jianmin , Ding, Yue , Wang, Gangfeng . Statistical contact model of rough surfaces: The role of surface tension . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2018 , 138 , 217-223 .
Export to NoteExpress RIS BibTex
The Statistical Characteristics of Static Friction EI Scopus SCIE
期刊论文 | 2018 , 10 (8) | International Journal of Applied Mechanics
Abstract&Keyword Cite

Abstract :

Friction is one of the fundamental issues in physics, mechanics and material science with many practical applications. However, the understanding of macroscopic friction phenomena from microscopic aspect is still on the way. In this paper, molecular dynamics simulations are performed to investigate the static friction between two planar crystal surfaces. The friction force experienced by each atom is tracked and the statistical characteristics of atomic friction force are illuminated. More importantly, the influences of normal load and temperature on the statistical features are generalized. This study provides a new insight on the micro-states of friction. © 2018 World Scientific Publishing Europe Ltd.

Keyword :

Atomic friction Friction force Macroscopic friction Material science Molecular dynamics simulations Static friction Statistical characteristics Statistical features

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Wang, Jian , Wang, Gangfeng , Yuan, Weike et al. The Statistical Characteristics of Static Friction [J]. | International Journal of Applied Mechanics , 2018 , 10 (8) .
MLA Wang, Jian et al. "The Statistical Characteristics of Static Friction" . | International Journal of Applied Mechanics 10 . 8 (2018) .
APA Wang, Jian , Wang, Gangfeng , Yuan, Weike , Bian, Jianjun . The Statistical Characteristics of Static Friction . | International Journal of Applied Mechanics , 2018 , 10 (8) .
Export to NoteExpress RIS BibTex
10| 20| 50 per page
< Page ,Total 10 >

Export

Results:

Selected

to

Format:
FAQ| About| Online/Total:3564/55033566
Address:XI'AN JIAOTONG UNIVERSITY LIBRARY(No.28, Xianning West Road, Xi'an, Shaanxi Post Code:710049) Contact Us:029-82667865
Copyright:XI'AN JIAOTONG UNIVERSITY LIBRARY Technical Support:Beijing Aegean Software Co., Ltd.