Tribology and Materials最新文献_第3页

Investigation of the penetration of the counter-body in the nitride zone of steels and analysis of concomitant characteristics 钢氮化区反体侵彻的研究及伴随特征分析

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.006

Angel Zyumbilev, N. Tonchev, E. Hristov Yankov, Iliya Zyumbilev, V. Gaydarov

{"title":"Investigation of the penetration of the counter-body in the nitride zone of steels and analysis of concomitant characteristics","authors":"Angel Zyumbilev, N. Tonchev, E. Hristov Yankov, Iliya Zyumbilev, V. Gaydarov","doi":"10.46793/tribomat.2022.006","DOIUrl":"https://doi.org/10.46793/tribomat.2022.006","url":null,"abstract":"The present research summarises the influence of technological modes based on experimental studies of steels BH11 and BH21 (BS 4659) for hot work in ion nitriding. The peculiarity is that one or several precisely defined modes are not fixed, but a group of parameters from the action of the considered technology in a planned experiment is studied. As a result, the technological modes of ion-nitrided steels are determined, corresponding to the minimal and maximal penetration of the counter-body in the nitrided layer. The obtained results are based on additional research related to microhardness and relative wear resistance. In this way a finished idea of the tribological properties of ion nitrided steels with a specialised purpose is obtained. The tools by which the problem is solved are design of experiments (DOE), modelling and single-criteria optimisation of controlled quantities. The main contribution of the paper is a formalised determination of the influence of the technological parameters of ionic nitriding on the phase composition of the nitrided zone and respectively on the wear resistance of the surface layer.","PeriodicalId":140630,"journal":{"name":"Tribology and Materials","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126571091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface roughness evaluation of different novel CAD/CAM dental materials 不同新型CAD/CAM牙科材料的表面粗糙度评价

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.010

Stefan Vulović, I. Stančić, Aleksandra Popovac, Aleksandra Milić-Lemić

引用次数: 0

Numerical simulation of two-dimensional crack propagation using stretching finite element method by Abaqus 基于Abaqus的拉伸有限元法二维裂纹扩展数值模拟

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.018

M. Bentahar, H. Benzaama

{"title":"Numerical simulation of two-dimensional crack propagation using stretching finite element method by Abaqus","authors":"M. Bentahar, H. Benzaama","doi":"10.46793/tribomat.2022.018","DOIUrl":"https://doi.org/10.46793/tribomat.2022.018","url":null,"abstract":"Fatigue is a phenomenon that appears in items subjected to cyclic loads. Thus, rupture and partial oxidation are initiated from the beginning of the process. For this, the study of such a problem of material in fracture mechanics is based on the numerical analysis of the characteristics of a crack. In this article, we propose a modelling of crack propagation by a new method of stretching the mesh by 2D finite element in mixed mode, based on the creation of the elements through a program in the computer language Fortran. The parametric mesh with 4 nodes (CPE4) was created to make the simulation and to characterise the stress intensity factors, by the Abaqus computer code. For this, the validation of stretching finite element method (SFEM) results is done by other methods: extended finite element method (XFEM) and analytical method to simulate the crack propagation. The stress intensity factor (SIF) is an essential parameter of this study. Two possibilities for determining the SIF have been retained: one by the numerical method of our choice and the other by the analytical method. Parameters to characterise the stress state at the crack front KI and KII were evaluated in two stages one by the crack length and the other by the a/c ratio.","PeriodicalId":140630,"journal":{"name":"Tribology and Materials","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Determination of the optimal mode of laser surface marking of aluminium composite panels with CO2 laser CO2激光对铝复合板表面激光打标的最佳方式确定

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.011

E. Hristov Yankov, R. Minev, N. Tonchev, L. Lazov

引用次数: 1

The influence of thread screw parameters on the efficiency of threaded joints 螺纹螺纹参数对螺纹连接效率的影响

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2023.005

M. Ristivojević, A. Dimić, N. Kolarević

引用次数: 0

Evaluation of the wear and corrosion resistance of coated parallel gate valve 涂层平行闸阀的耐磨损和耐腐蚀性能评价

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.002

J. Ri, R. Ripeanu

引用次数: 3

The sealing mechanism of radial lip seals: A numerical study of the tangential distortion of the sealing edge 径向唇形密封的密封机理:密封边缘切向畸变的数值研究

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.001

Jeremias Grün, Simon Feldmeth, F. Bauer

{"title":"The sealing mechanism of radial lip seals: A numerical study of the tangential distortion of the sealing edge","authors":"Jeremias Grün, Simon Feldmeth, F. Bauer","doi":"10.46793/tribomat.2022.001","DOIUrl":"https://doi.org/10.46793/tribomat.2022.001","url":null,"abstract":"The sealing behaviour of elastomeric radial lip seals is essentially affected by the sealing mechanism in the contact area between the sealing edge and the shaft surface. The relative motion between radial lip seal and shaft deforms the sealing edge tangentially in the circumferential direction. This mechanical deformation is considered essential for the sealing mechanism. In this study, a numerical approach is employed to simulate this deformation. A three-dimensional multiscale model serves this purpose. The radial lip seal geometry is described on the macro-scale. On the micro-scale, an artificial rough surface with a stochastic roughness distribution is applied to an ideal sealing edge surface. A new meshing algorithm is used to discretise different sealing edge surfaces and automatically generates structured hexahedral meshes of the sealing edges. Mesh transitions connect the resulting finely meshed sealing edge to the coarsely meshed global macro-scale mesh of the radial lip seal. The paper introduces the modelling method used to simulate the deformation of radial lip seals. Results are presented and discussed with reference to the sealing behaviour. This contributes to a better understanding of the sealing mechanism of radial lip seals. Keywords: radial lip seal, finite element analysis, surface roughness, elastic deformation, elastomers.","PeriodicalId":140630,"journal":{"name":"Tribology and Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122248564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Simulation of heat transfer in a turbocharger bearing housing 涡轮增压器轴承座内传热模拟

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.007

E. Zadorozhnaya, V. Hudyakov, S. Sibiryakov

{"title":"Simulation of heat transfer in a turbocharger bearing housing","authors":"E. Zadorozhnaya, V. Hudyakov, S. Sibiryakov","doi":"10.46793/tribomat.2022.007","DOIUrl":"https://doi.org/10.46793/tribomat.2022.007","url":null,"abstract":"Modern world trends in engine building are characterised by the production of forced engines. The most popular and promising forcing method is the use of a turbocharger. The efficiency of journal bearings determines the reliability of TCR, which should be structurally simple, compact, reliable and inexpensive, while providing acceptable characteristics of rotor dynamics, noise, vibration and stiffness speeds. The best performance of the bearing unit is achieved with hydrodynamic lubrication, which depends on optimal operating and temperature conditions. The maximum operating temperature of the bearing assembly must be taken into account at the design stage. The purpose of this article is to develop an algorithm for calculating the heat transfer in the turbocharger bearing housing in order to assess the effect of the thermal state of the radial bearing on its performance and on the dynamics of the rotor. The simulation was carried out in the ANSYS software package and the developed software. The boundary conditions for the calculation were obtained from experimental data. The result of the simulation was the determination of temperatures and thermal fields in the turbocharger housing, as well as the values of the change in clearances under the influence of thermal expansion of parts. Verification of the results was carried out on the basis of comparison with the results obtained by other authors. Conclusions were drawn about the effect of thermal deformations on the rotor dynamics and the hydromechanical characteristics of the bearing.","PeriodicalId":140630,"journal":{"name":"Tribology and Materials","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Tribology and self-organization in reducing friction: A brief review 减少摩擦的摩擦学和自组织:简要综述

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.005

E. Assenova, A. Vencl

引用次数: 4

Hardness and tribological properties of laser irradiated PMMA based nano-microcomposites 激光辐照PMMA基纳米微复合材料的硬度和摩擦学性能

Tribology and Materials Pub Date : 1900-01-01 DOI: 10.46793/tribomat.2022.003

H. Hebatalrahman

引用次数: 0