Mechanics and Mechanical Engineering最新文献_第9页

Novel Method of Friction Identification with Application for Inverted Pendulum Control System 摩擦辨识新方法及其在倒立摆控制系统中的应用

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0095

M. Balcerzak

引用次数: 1

A Second Order Secular J–S Planetary Theory Part I : Lemma 二阶世俗J-S行星理论第一部分:引理

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0067

O. Kamel, A. S. Soliman

引用次数: 0

Response of Thermoelastic Interactions in Micropolar Porous Circular Plate with Three Phase Lag Model 基于三相滞后模型的微极多孔圆板热弹性相互作用响应

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0080

Rajneesh Kumar, A. Miglani, R. Rani

引用次数: 1

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites 高温对搅拌铸造铝/碳化硼复合材料磨损行为的影响

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0082

X. Canute, M. Majumder

{"title":"Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites","authors":"X. Canute, M. Majumder","doi":"10.2478/mme-2018-0082","DOIUrl":"https://doi.org/10.2478/mme-2018-0082","url":null,"abstract":"Abstract The need for development of high temperature wear resistant composite materials with superior mechanical properties and tribological properties is increasing significantly. The high temperature wear properties of aluminium boron carbide composites was evaluated in this investigation. The effect of load, sliding velocity, temperature and reinforcement percentage on wear rate was determined by the pin heating method using pin heating arrangement. The size and structure of base alloy particles change considerably with an increase of boron carbide particles. The wettability and interface bonding between the matrix and reinforcement enhanced by the addition of potassium flurotitanate. ANOVA technique was used to study the effect of input parameters on wear rate. The investigation reveals that the load had higher significance than sliding velocity, temperature and weight fraction. The pin surface was studied with a high-resolution scanning electron microscope. Regression analysis revealed an extensive association between control parameters and response. The developed composites can be used in the production of automobile parts requiring high wear, frictional and thermal resistance.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"22 1","pages":"1031 - 1046"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46553541","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

Propagation and Reflection of Plane Waves in a Rotating Magneto-Elastic Fibre-Reinforced Semi Space with Surface Stress 具有表面应力的旋转磁弹性纤维增强半空间中平面波的传播和反射

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0074

I. Roy, D. Acharya, S. Acharya

引用次数: 6

Fatigue Crack Growth Rate, Microstructure and Mechanical Properties of Diverse Range of Aluminum Alloy: A Comparison 不同范围铝合金疲劳裂纹扩展速率、显微组织和力学性能的比较

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0113

A. Brahami, B. Bouchouicha, M. Zemri, J. Fajoui

引用次数: 1

Research of the Cutting Possibility of Magnesium Alloys with Abrasive Diamond Wire Saw 磨料金刚石线锯切割镁合金可行性的研究

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0100

M. Wiśniewska

引用次数: 0

Impact of Fiber Metal Laminates - Literature Research 金属纤维层压板的影响——文献研究

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0106

Bartłomiej Lisowski

{"title":"Impact of Fiber Metal Laminates - Literature Research","authors":"Bartłomiej Lisowski","doi":"10.2478/mme-2018-0106","DOIUrl":"https://doi.org/10.2478/mme-2018-0106","url":null,"abstract":"Abstract The paper refers the general idea of composite materials especially Fiber Metal Laminates (FMLs) with respect to low-velocity impact incidents. This phenomenon was characterized by basic parameters and energy dissipation mechanisms. Further considerations are matched with analytical procedures with reference to linearized spring-mass models, impact characteristics divided into energy correlations (global flexure, delamination, tensile fracture and petaling absorbed energies) and set of motion second order differential equations. Experimental tests were based on analytical solutions for different types of FML - GLARE type plates and were held in accordance to ASTM standards. The structure model reveals plenty of dependences related to strain rate effect, deflection represented by the correlations among plate and intender deformation, separate flexure characteristics for aluminium and composite, contact definition based on intender end-radius shape stress analysis supported by FSDT, von Karman strains as well as CLT. Failure criteria were conformed to layers specifications with respect to von Misses stress-strain criterion for aluminium matched with Tsai-Hill or Puck criterion for unidirectional laminate. At the final stage numerical simulation were made in FEM programs such as ABAQUS and ANSYS. Future prospects were based on the experiments held over 3D-fiberglass (3DFG) FMLs with magnesium alloy layers which covers more favorable mechanical properties than FMLs.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"22 1","pages":"1355 - 1370"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42635726","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

Transient Natural Convection in Partitioned Enclosures 分隔板内的瞬态自然对流

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0081

F. Zemani, A. Sabeur-Bendehina

{"title":"Transient Natural Convection in Partitioned Enclosures","authors":"F. Zemani, A. Sabeur-Bendehina","doi":"10.2478/mme-2018-0081","DOIUrl":"https://doi.org/10.2478/mme-2018-0081","url":null,"abstract":"Abstract In this paper, the natural convection flow in a cavity heated differentially with a partition placed in the middle of the hot wall is numerically simulated. The aspect ratio of the geometry, Prandtl number are fixed at 0.24, 6.64, respectively, for different partitions lengths; however the Rayleigh number values were ranging from 106 to 3.77 × 109 in order to observe the transition regime. The fluid flow and the heat transfer described in terms of continuity, linear momentum and energy equations were predicted by using the finite volume method. To approach the physical reality experience, calculations were performed in a cavity with the same size and same priority of the fluid with an average temperature Tm imposed on the cooled wall, also another simulation with an average temperature Tm imposed on the horizontal wall. Time evolution, isotherms and mean Nusselt number are presented for all investigated values. Representative results illustrating the effects of the partition length for the heat transfer and the thermal boundary layer are also reported and discussed. The results indicate that the flow and heat transfer properties are altered by the presence of the partition, especially in the initial stage. In a certain sense, the partition blocks the flow and forces it to come off the hot wall. Since the partition parameters are critical for the transient natural convection flow in the cavity, different partition lengths on the warm wall have been studied.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"22 1","pages":"1015 - 1030"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45875228","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

Reflection of Plane Waves from Surface of a Generalized Thermo-Viscoelastic Porous Solid Half-Space with Impedance Boundary Conditions 具有阻抗边界条件的广义热粘弹性多孔固体半空间表面平面波的反射

Mechanics and Mechanical Engineering Pub Date : 2018-12-01 DOI: 10.2478/mme-2018-0116

Baljeet Singh

{"title":"Reflection of Plane Waves from Surface of a Generalized Thermo-Viscoelastic Porous Solid Half-Space with Impedance Boundary Conditions","authors":"Baljeet Singh","doi":"10.2478/mme-2018-0116","DOIUrl":"https://doi.org/10.2478/mme-2018-0116","url":null,"abstract":"Abstract A phenomenon of reflection of plane waves from a thermally insulated surface of a solid half-space is studied in context of Lord-Shulman theory of generalized thermo-viscoelasticity with voids. The governing equations of generalized thermo-viscoelastic medium with voids are specialized in x–z plane. The plane wave solution of these equations shows the existence of three coupled longitudinal waves and a shear vertical wave in a generalized thermo-viscoelastic medium with voids. For incident plane wave (longitudinal or shear), three coupled longitudinal waves and a shear vertical wave reflect back in the medium. The mechanical boundary conditions at free surface of solid half-space are considered as impedance boundary conditions, in which the shear force tractions are assumed to vary linearly with the tangential displacement components multiplied by the frequency. The impedance corresponds to the constant of proportionality. The appropriate potentials of incident and reflected waves in the half-space will satisfy the required impedance boundary conditions. A non-homogeneous system of four equations in the amplitude ratios of reflected waves is obtained. These amplitude ratios are functions of material parameters, impedance parameter, angle of incidence, thermal relaxation and speeds of plane waves. Using relevant material parameters for medium, the amplitude ratios are computed numerically and plotted against certain ranges of impedance parameter and the angle of incidence.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"22 1","pages":"1483 - 1496"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46061868","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