• 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 11 >
Modelling tangential contact problem with surface stress EI
期刊论文 | 2022 , 91 | Solids
Abstract&Keyword Cite

Abstract :

In this paper, we investigate the effects of surface stress on the spherical contact problem under combined normal and lateral loads. The boundary element method based on fast Fourier transform and conjugate gradient algorithm is employed to perform the contact analysis with partial slip. It is shown that as the size of contact reduces to the characteristic scale that surface stress dominates, the contact behavior will significantly deviate from the classical model. Under the same loading condition, the tangential traction within contact region tends to distribute more evenly and the width of slip zone would be relatively smaller due to the presence of surface stress. In addition, it is found that the variations of the total tangential force and the lateral contact stiffness with respect to the lateral displacement depend strongly on the contact scale. This work provides a theoretical basis for the study of contact and friction of some soft materials and biological systems. © 2021 Elsevier Masson SAS

Keyword :

Stress analysis Boundary element method Fast Fourier transforms Surface properties Sailing vessels Conjugate gradient method

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yuan, Weike , Zheng, Yanbin , Wang, Gangfeng . Modelling tangential contact problem with surface stress [J]. | Solids , 2022 , 91 .
MLA Yuan, Weike 等. "Modelling tangential contact problem with surface stress" . | Solids 91 (2022) .
APA Yuan, Weike , Zheng, Yanbin , Wang, Gangfeng . Modelling tangential contact problem with surface stress . | Solids , 2022 , 91 .
Export to NoteExpress RIS BibTex
Influence of hydrogenation on the mechanical properties of Pd nanoparticles EI SCIE
期刊论文 | 2021 , 11 (5) , 3115-3124 | RSC Advances
Abstract&Keyword Cite

Abstract :

Atomic simulations are conducted to investigate the influence of hydrogenation on the mechanical properties of Pd nanoparticles. It is found that with an increase in the H atom content both the elastic modulus and the yield stress decrease approximately linearly. Moreover, the H atom content evidently alters the atomic deformation mechanisms in Pd nanoparticles. When the H atom content is in the range of 0-0.3, yield initiates from dislocation nucleating beneath surface steps and then a pyramid hillock is formed. Subsequently, dislocation nucleation and exhaustion at the surface will govern the plastic deformation. However, when the H atom content is in the range of 0.3-0.4, massive initial defects are introduced by hydrogenation, which partially suppress the dislocation nucleation around the surface steps, and no pyramid dislocation hillock is formed. Dislocation multiplication will dominate the subsequent plastic deformation. Moreover, as the H atom content increases to 0.4-0.5, the recoverable phase transition plays a key role in the plastic deformation. This study enriches our understanding of the impact of hydrogenation on the mechanical properties and deformation mechanisms of Pd nanoparticles. This journal is © 2021 The Royal Society of Chemistry.

Keyword :

Nucleation Hydrogenation Yield stress Crystallization Nanoparticles Plastic deformation Atoms

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Bian, Jianjun , Yang, Liang , Yuan, Weike et al. Influence of hydrogenation on the mechanical properties of Pd nanoparticles [J]. | RSC Advances , 2021 , 11 (5) : 3115-3124 .
MLA Bian, Jianjun et al. "Influence of hydrogenation on the mechanical properties of Pd nanoparticles" . | RSC Advances 11 . 5 (2021) : 3115-3124 .
APA Bian, Jianjun , Yang, Liang , Yuan, Weike , Wang, Gangfeng . Influence of hydrogenation on the mechanical properties of Pd nanoparticles . | RSC Advances , 2021 , 11 (5) , 3115-3124 .
Export to NoteExpress RIS BibTex
Influence of Equi-Biaxial Residual Stress on Spherical Indentation of Strain Hardening Materials EI SCIE
期刊论文 | 2021 , 13 (5) | INTERNATIONAL JOURNAL OF APPLIED MECHANICS
Abstract&Keyword Cite

Abstract :

Residual stress plays an important role in the mechanical performance of engineering structures. In this paper, the indentation of pre-stressed strain hardening materials by a rigid sphere is simulated through the finite element method. It is shown that the mean contact pressure in the post-yield regime keeps continuously increasing with the indentation proceeding. Compared to the case without residual stress, compressive residual stress tends to increase the mean contact pressure at a given indentation depth, while tensile stress has an inverse effect. To quantitatively indicate the influence of residual stress, a nominal contact pressure is defined, which obtains its maximum value at a critical depth. The dependences of the maximum nominal pressure and the critical indentation depth on the residual stress and the material properties are determined explicitly through large numbers of simulations. Inspired by the nominal pressure deviation stemmed from residual stress, a new approach is proposed for measuring residual stress through spherical indentation tests.

Keyword :

Indentation hardening effect mean contact pressure residual stress

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Liang, Tong , Yuan, Weike , Wang, Gangfeng . Influence of Equi-Biaxial Residual Stress on Spherical Indentation of Strain Hardening Materials [J]. | INTERNATIONAL JOURNAL OF APPLIED MECHANICS , 2021 , 13 (5) .
MLA Liang, Tong et al. "Influence of Equi-Biaxial Residual Stress on Spherical Indentation of Strain Hardening Materials" . | INTERNATIONAL JOURNAL OF APPLIED MECHANICS 13 . 5 (2021) .
APA Liang, Tong , Yuan, Weike , Wang, Gangfeng . Influence of Equi-Biaxial Residual Stress on Spherical Indentation of Strain Hardening Materials . | INTERNATIONAL JOURNAL OF APPLIED MECHANICS , 2021 , 13 (5) .
Export to NoteExpress RIS BibTex
A modified beam model based on Gurtin-Murdoch surface elasticity theory EI SCIE
期刊论文 | 2021 , 56 (5) , 1147-1164 | MECCANICA
Abstract&Keyword Cite

Abstract :

In this work, a modified surface-effect incorporated beam model based on Gurtin and Murdoch (GM) surface elasticity theory is established by satisfying the required balance equations on surfaces, which is often overlooked by researchers in this field. With the refinement, the proposed model is more rigorous in mathematics and mechanics compared with GM theory-based beam models in literature. To demonstrate the model, the problem for static bending of simply supported beam considering surface effects is solved by applying the general equations derived, and numerical results are obtained and discussed.

Keyword :

Surface balance conditions Surface effects Size-dependent Nanobeam

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Lu, Pin , Liu, Rui , Zhai, Hua et al. A modified beam model based on Gurtin-Murdoch surface elasticity theory [J]. | MECCANICA , 2021 , 56 (5) : 1147-1164 .
MLA Lu, Pin et al. "A modified beam model based on Gurtin-Murdoch surface elasticity theory" . | MECCANICA 56 . 5 (2021) : 1147-1164 .
APA Lu, Pin , Liu, Rui , Zhai, Hua , Wang, Gangfeng , Yu, Peng , Lu, Chun . A modified beam model based on Gurtin-Murdoch surface elasticity theory . | MECCANICA , 2021 , 56 (5) , 1147-1164 .
Export to NoteExpress RIS BibTex
Statistical Characterization of the Yield Stress of Nanoparticles EI SCIE CSCD
期刊论文 | 2021 , 34 (2) , 149-156 | ACTA MECHANICA SOLIDA SINICA
Abstract&Keyword Cite

Abstract :

Atomistic simulations are performed to study the statistical mechanical properties of gold nanoparticles. It is demonstrated that the yielding behavior of gold nanoparticles is governed by the dislocation nucleation around surface steps. Since the nucleation of dislocation is an activated process with the aid of thermal fluctuation, the yield stress at a specific temperature should vary statistically rather than being a definite constant value. Molecular dynamics simulations reveal that the yield stress follows a Gaussian distribution at a specific temperature. As the temperature increases, the mean value of yield stress decreases while the width of distribution becomes larger. Based on the numerical analysis, the dependence of mean yield stress on temperature can be well described by a parabolic function. This study illuminates the statistical features of the yielding behavior of nanostructured elements.

Keyword :

Molecular dynamics Gaussian distribution Yield stress Gold nanoparticle

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yang, Liang , Bian, Jianjun , Yuan, Weike et al. Statistical Characterization of the Yield Stress of Nanoparticles [J]. | ACTA MECHANICA SOLIDA SINICA , 2021 , 34 (2) : 149-156 .
MLA Yang, Liang et al. "Statistical Characterization of the Yield Stress of Nanoparticles" . | ACTA MECHANICA SOLIDA SINICA 34 . 2 (2021) : 149-156 .
APA Yang, Liang , Bian, Jianjun , Yuan, Weike , Wang, Gangfeng . Statistical Characterization of the Yield Stress of Nanoparticles . | ACTA MECHANICA SOLIDA SINICA , 2021 , 34 (2) , 149-156 .
Export to NoteExpress RIS BibTex
An experimental study on the relation between friction force and real contact area SCIE PubMed
期刊论文 | 2021 , 11 (1) | SCIENTIFIC REPORTS
Abstract&Keyword Cite

Abstract :

Classical laws of friction suggest that friction force is proportional to the normal load and independent of the nominal contact area. As a great improvement in this subject, it is now widely accepted that friction force is proportional to the real contact area, and much work has been conducted based on this hypothesis. In present study, this hypothesis will be carefully revisited by measuring the friction force and real contact area in-site and real-time at both normal loading and unloading stages. Our experiments reveal that the linear relation always holds between friction force and normal load. However, for the relation between friction force and real contact area, the linearity holds only at the loading stage while fails at the unloading stage. This study may improve our understanding of the origin of friction.

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Liang, X. M. , Xing, Y. Z. , Li, L. T. et al. An experimental study on the relation between friction force and real contact area [J]. | SCIENTIFIC REPORTS , 2021 , 11 (1) .
MLA Liang, X. M. et al. "An experimental study on the relation between friction force and real contact area" . | SCIENTIFIC REPORTS 11 . 1 (2021) .
APA Liang, X. M. , Xing, Y. Z. , Li, L. T. , Yuan, W. K. , Wang, G. F. . An experimental study on the relation between friction force and real contact area . | SCIENTIFIC REPORTS , 2021 , 11 (1) .
Export to NoteExpress RIS BibTex
Measurement of Real Contact Area for Rough Metal Surfaces and the Distinction of Contribution From Elasticity and Plasticity EI SCIE
期刊论文 | 2021 , 143 (7) | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
WoS CC Cited Count: 5
Abstract&Keyword Cite

Abstract :

The measurement of the real contact area between rough surfaces is one of the most challenging problems in contact mechanics and is of importance to understand some physical mechanisms in tribology. Based on the frustrated total internal reflection, a new apparatus is designed to measure the real contact area. For metallic samples with various surface topographies, the relation between normal load and the real contact area is measured. The unloading process is first considered to distinguish the contribution of elasticity and plasticity in contact with rough surfaces. It is found that both elasticity and plasticity are involved throughout the continuous loading process, different from some present understanding and assumptions that they play at different loading stages. A quantitative parameter is proposed to indicate the contribution of plasticity. The present work not only provides an experimental method to measure the real contact area but figures out how elastic and plastic deformation works in contact with rough surfaces.

Keyword :

real contact area contact mechanics rough surface contact

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Lei-Tao , Liang, Xuan-Ming , Xing, Yu-Zhe et al. Measurement of Real Contact Area for Rough Metal Surfaces and the Distinction of Contribution From Elasticity and Plasticity [J]. | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
MLA Li, Lei-Tao et al. "Measurement of Real Contact Area for Rough Metal Surfaces and the Distinction of Contribution From Elasticity and Plasticity" . | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 143 . 7 (2021) .
APA Li, Lei-Tao , Liang, Xuan-Ming , Xing, Yu-Zhe , Yan, Duo , Wang, Gang-Feng . Measurement of Real Contact Area for Rough Metal Surfaces and the Distinction of Contribution From Elasticity and Plasticity . | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
Export to NoteExpress RIS BibTex
Hole transport free flexible perovskite solar cells with cost-effective carbon electrodes EI SCIE PubMed
期刊论文 | 2021 , 32 (10) | NANOTECHNOLOGY
WoS CC Cited Count: 5
Abstract&Keyword Cite

Abstract :

Low temperature derived carbon electrodes are employed to fabricate low cost hole transport layer free perovskite solar cells, in which perovskite films annealed in glovebox and ambient air are used as the absorbers, respectively. Results suggest that the air annealed sample has bigger crystal grains and higher crystallinity, and the existence of a small amount of lead iodide which passivates grain boundaries contributes to a lower trap density. As a result, a maximum power conversion efficiency (PCE) of 13.07% was obtained on the air annealed device, which is higher than those of devices annealed in glovebox (11.25%). Furthermore, the stability of unencapsulated devices stored in wet (with humidity around 90% 5%) air atmosphere are investigated and the results prove that our devices exhibit good stability. In addition to rigid devices, flexible perovskite solar cells are also fabricated using the same procedure. The highest PCE of 11.53% is demonstrated on the champion flexible device, and 69% of its initial PCE can be maintained even after 2000 bending cycles with a bending radius of 2 mm. Our work provides a promising and simple rout for low-cost, air-stable, high-efficiency carbon perovskite solar cells for both large area production and flexible electronic devices industry.

Keyword :

carbon electrode low-cost perovskite solar cells flexible durability stability

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Xie, Haixia , Yin, Xingtian , Guo, Yuxiao et al. Hole transport free flexible perovskite solar cells with cost-effective carbon electrodes [J]. | NANOTECHNOLOGY , 2021 , 32 (10) .
MLA Xie, Haixia et al. "Hole transport free flexible perovskite solar cells with cost-effective carbon electrodes" . | NANOTECHNOLOGY 32 . 10 (2021) .
APA Xie, Haixia , Yin, Xingtian , Guo, Yuxiao , Liu, Dan , Liang, Tong , Wang, Gangfeng et al. Hole transport free flexible perovskite solar cells with cost-effective carbon electrodes . | NANOTECHNOLOGY , 2021 , 32 (10) .
Export to NoteExpress RIS BibTex
An incremental equivalent circular contact model for rough surfaces EI SCIE
期刊论文 | 2021 , 143 (8) | Journal of Tribology
WoS CC Cited Count: 2
Abstract&Keyword Cite

Abstract :

The accurate calculation of the real contact area between rough surfaces is a key issue in tribology. In this paper, based on the geometrical information of total contact area and the number of contact patches with respect to surface separation, a new method is proposed to determine the relation between real contact area and normal load. The contact of rough surfaces is treated as an accumulation of equivalent circular contacts with varying average contact radius. For a realistic range of separation, the proposed model predicts a linear relation between real contact area and load, and coincides well with direct finite element calculations. Moreover, this model is general and not confined to isotropic Gaussian surfaces. Copyright © 2021 by ASME.

Keyword :

Surface measurement Tribology Friction

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Wang, G.F , Liang, X.M , Yan, D . An incremental equivalent circular contact model for rough surfaces [J]. | Journal of Tribology , 2021 , 143 (8) .
MLA Wang, G.F et al. "An incremental equivalent circular contact model for rough surfaces" . | Journal of Tribology 143 . 8 (2021) .
APA Wang, G.F , Liang, X.M , Yan, D . An incremental equivalent circular contact model for rough surfaces . | Journal of Tribology , 2021 , 143 (8) .
Export to NoteExpress RIS BibTex
Adhesion between a rigid sphere and a stretched membrane using the Dugdale model EI SCIE
期刊论文 | 2021 , 208 , 214-220 | International Journal of Solids and Structures
WoS CC Cited Count: 1
Abstract&Keyword Cite

Abstract :

This paper develops a simple theoretical model for the adhesive contact between a rigid sphere and a circular membrane radially stretched by constant tension. The adhesive stress between the surfaces in front of the contact edge is approximated by a constant value within a finite length. The mutual relations between net external force, contact radius, and contact displacement are obtained analytically. In particular, the critical contact responses at pull-off force and at zero external force are presented as functions of a dimensionless adhesion range parameter, respectively. It is demonstrated that the general solution can completely quantify the transition from the DMT-type limit to the JKR-type limit. These results might be helpful for the advancement of adhesion mechanics of thin membranes. © 2020 Elsevier Ltd

Keyword :

Adhesion Adhesives

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yuan, Weike , Wang, Gangfeng . Adhesion between a rigid sphere and a stretched membrane using the Dugdale model [J]. | International Journal of Solids and Structures , 2021 , 208 : 214-220 .
MLA Yuan, Weike et al. "Adhesion between a rigid sphere and a stretched membrane using the Dugdale model" . | International Journal of Solids and Structures 208 (2021) : 214-220 .
APA Yuan, Weike , Wang, Gangfeng . Adhesion between a rigid sphere and a stretched membrane using the Dugdale model . | International Journal of Solids and Structures , 2021 , 208 , 214-220 .
Export to NoteExpress RIS BibTex
10| 20| 50 per page
< Page ,Total 11 >

Export

Results:

Selected

to

Format:
FAQ| About| Online/Total:482/105563422
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.