Mechanics and Mechanical Engineering最新文献_第5页

Optimization of the Process Parameters of Resistance Spot Welding of AISI 316l Sheets Using Taguchi Method 用田口法优化aisi316l薄板电阻点焊工艺参数

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0009

P. Muthu

{"title":"Optimization of the Process Parameters of Resistance Spot Welding of AISI 316l Sheets Using Taguchi Method","authors":"P. Muthu","doi":"10.2478/mme-2019-0009","DOIUrl":"https://doi.org/10.2478/mme-2019-0009","url":null,"abstract":"Abstract Resistance spot welding (RSW) is a fabrication process that is being used in the automobile and aerospace industry since many years for joining low carbon or “mild” steel. Quality and strength of the welds depend upon the process parameters of RSW. The most effective parameters in this process are: current intensity, welding time, sheet thickness and material, geometry of electrodes, electrode force, and current shunting. This paper presents the experimental investigations for the optimization of tensile shear stress of RSW for stainless steel grade 316L sheets by using Taguchi method. The experiments were conducted using Taguchi’s L27 orthogonal array under varying process parameters, namely electrode diameter, welding current, and heating time. The experimental data were analyzed using signal-to-noise ratio (S/N ratio) to find the optimal process parameters. Analysis of variance (ANOVA) and F test were used to find the most significant parameters affecting the spot weld quality characteristics. Confirmation tests with optimal process parameters were conducted to validate the test results. From the results, it was found that it is possible to increase tensile shear stress significantly.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"23 1","pages":"64 - 69"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46175429","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: 7

Modeling the inspection robot with magnetic pressure pad 磁压力垫检测机器人的建模

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0007

K. Kurc, A. Burghardt, D. Szybicki, J. Giergiel

引用次数: 0

Experimental Investigation of a Centrifugal Pump Hydraulic Performance in Hydraulic Transmission of Solids 固体液压传动中离心泵液压性能的实验研究

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0035

Reza Barmaki, M. B. Ehghaghi

{"title":"Experimental Investigation of a Centrifugal Pump Hydraulic Performance in Hydraulic Transmission of Solids","authors":"Reza Barmaki, M. B. Ehghaghi","doi":"10.2478/mme-2019-0035","DOIUrl":"https://doi.org/10.2478/mme-2019-0035","url":null,"abstract":"Abstract In petroleum and mine industries, the centrifugal pumps were used for transferring solid particles with water. This method is preferable to other methods because of its user friendly and economic issues. In this article by selecting a proper pump and designing test circuit, we conducted hydraulic tests for water and water mixture with solid particles. For this purpose, an experimental set-up of centrifugal pump with only water and water with solid particles was developed. Then by analyzing the test results and efficiency equation, optimal coefficients of head loss is provided to improve the pump efficiency during hydraulic transmission of solids. The experimental results of power consumption, head, and pressure difference measurements in solid–liquid systems are presented. The experimental set-up results are compared with simulation and numerical one, which show a good agreement with them. It reveals that by adding the solid particles and increasing the fluid density up to 15%, the consumed power increases by about 20%, which result in dropping the efficiency of hydraulic system up to 6%. Finally, the optimal components for developed cycle presented for evaluation the various configuration and hydraulic analysis of pure flow and flow with solid particles in various applications to enhance the most achievable efficiency.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"23 1","pages":"259 - 270"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41373096","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: 7

Finite element simulation and experimental validation of the effect of tool wear on cutting forces in turning operation 车削加工中刀具磨损对切削力影响的有限元仿真与实验验证

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/MME-2019-0040

S. Sai Venkatesh, T. Ram Kumar, A. P. Blalakumhren, M. Saimurugan, K. Marimuthu

引用次数: 5

Numerical Validation of Drilling of Al6061-T6 with Experimental Data Al6061-T6钻削试验数据的数值验证

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0038

P. Elango, K. Marimuthu

引用次数: 3

Shear buckling of steel foam sandwich panel resting on Pasternak foundation 帕斯捷尔纳克基础上泡沫钢夹芯板的剪切屈曲

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0025

Ebrahim Nazarimofrad, Mehdi Barang

引用次数: 1

A Detailed Study of Row-Trenched Holes at the Combustor Exit on Film-Cooling Effectiveness 燃烧室出口排孔对油膜冷却效果的影响研究

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0033

E. Kianpour, N. Sidik

引用次数: 0

Effect of Inerter in Traditional and Variant Dynamic Vibration Absorbers for One Degree-of-Freedom Systems Subjected to Base Excitations 传统和变型动力吸振器对受基础激励的一自由度系统的干涉效应

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0002

Dheepakram Laxmimala Barathwaaj, Sujay Yegateela, V. Vardhan, V. Suresh, Devarajan Kaliyannan

{"title":"Effect of Inerter in Traditional and Variant Dynamic Vibration Absorbers for One Degree-of-Freedom Systems Subjected to Base Excitations","authors":"Dheepakram Laxmimala Barathwaaj, Sujay Yegateela, V. Vardhan, V. Suresh, Devarajan Kaliyannan","doi":"10.2478/mme-2019-0002","DOIUrl":"https://doi.org/10.2478/mme-2019-0002","url":null,"abstract":"Abstract In this paper, closed-form optimal parameters of inerter-based variant dynamic vibration absorber (variant IDVA) coupled to a primary system subjected to base excitation are derived based on classical fixed-points theory. The proposed variant IDVA is obtained by adding an inerter alone parallel to the absorber damper in the variant dynamic vibration absorber (variant DVA). A new set of optimum frequency and damping ratio of the absorber is derived, thereby resulting in lower maximum amplitude magnification factor than the inerter-based traditional dynamic vibration absorber (traditional IDVA). Under the optimum tuning condition of the absorbers, it is proved both analytically and numerically that the proposed variant IDVA provides a larger suppression of resonant vibration amplitude of the primary system subjected to base excitation. It is demonstrated that adding an inerter alone to the variant DVA provides 19% improvement in vibration suppression than traditional IDVA when the mass ratio is less than 0.2 and the effective frequency bandwidth of the proposed IDVA is wider than the traditional IDVA. The effect of inertance and mass ratio on the amplitude magnification factor of traditional and variant IDVA is also studied.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"23 1","pages":"9 - 16"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45259008","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

Turning operation of AISI 4340 steel in flooded, near-dry and dry conditions: a comparative study on tool-work interface temperature AISI 4340钢在浸水、接近干燥和干燥条件下的车削操作：工具-工作界面温度的比较研究

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0023

M. Dennison, Sivaram N M, Debabrata Barik, S. Ponnusamy

{"title":"Turning operation of AISI 4340 steel in flooded, near-dry and dry conditions: a comparative study on tool-work interface temperature","authors":"M. Dennison, Sivaram N M, Debabrata Barik, S. Ponnusamy","doi":"10.2478/mme-2019-0023","DOIUrl":"https://doi.org/10.2478/mme-2019-0023","url":null,"abstract":"Abstract The objective of this study is to analyse the effect of tool-work interface temperature observed during the turning of AISI 4340 cylindrical steel components in three machining conditions, namely flooded, near-dry and dry conditions with three separate CNMG-PEF 800 diamond finish Titanium Nitride (TiN) coated carbide cutting tool. The machining parameters considered in this study are cutting velocity, feed rate and depth of cut. The experiments were planned based on full factorial design (33) and executed in an All Geared Conventional Lathe. The tool-work interface temperature was observed using a K-type tool-work thermocouple, while the machining of steel, and subsequently, a mathematical model was developed for the tool-work interface temperature values through regression analysis. The significance of the selected machining parameters and their levels on tool-work interface temperature was found using analysis of variance (ANOVA) and F-test. The results revealed that machining under near-dry condition exhibited lesser temperature at the tool-work interface, which is the sign of producing better quality products in equivalence with the machining under flooded condition.","PeriodicalId":53557,"journal":{"name":"Mechanics and Mechanical Engineering","volume":"23 1","pages":"172 - 182"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43529820","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: 18

Finite element model updating using Lagrange interpolation 利用拉格朗日插值法更新有限元模型

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI: 10.2478/mme-2019-0030

F. Asma

引用次数: 2