In this paper, objective functions of complex optimization of multi-step wire cold drawing technology is introduced and applied for an industrial DHCF 17 multistep wire technology. Two types of complex objective function are presented with either identical optimum cone-angles in each pass or variable optimum coneangles being able to differ between the drawing passes. Through this calculation, the results of the complex optimization were characterized and the results are compared with the original operating parameter values.
{"title":"Characterization of Complex Optimization of Multistep Wire Drawing Based on a Specific Industrial Technology","authors":"Sandor J. Kovacs, G. Szabó","doi":"10.26649/musci.2019.013","DOIUrl":"https://doi.org/10.26649/musci.2019.013","url":null,"abstract":"In this paper, objective functions of complex optimization of multi-step wire cold drawing technology is introduced and applied for an industrial DHCF 17 multistep wire technology. Two types of complex objective function are presented with either identical optimum cone-angles in each pass or variable optimum coneangles being able to differ between the drawing passes. Through this calculation, the results of the complex optimization were characterized and the results are compared with the original operating parameter values.","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"223 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":"127632569","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}
There are many technical discussions between global manufacturing and development companies competing to design a lightweight container to satisfy the requirements of shipping and airline companies. In this study, a methodology for a minimum weight optimization for honeycomb core sandwich panels with composite face sheets is presented, which can be primarily used for manufacturing of the walls, floor and roof of containers. The honeycomb sandwich panels consisted of symmetric composite face sheets the face sheets consisted of E-glass / epoxy fiber-reinforced plastic. The lay-up of the fibers of the face sheets was limited to sets of plies having orientation angles of 0 and 90. The new lightweight containers provide considerable savings in weight and thus reduce fuel consumption or increase aircraft turnover compared to conventional containers (see Fig. 1). According to the International Air Transport Association (IATA) calculations, the weight of fuel required to carry 1kg additional weight per hour is 0.04 Kg. The weight of the sandwich structure panels considered is the objective function subject to constraints needed based on the stiffness, face sheets failure, skin wrinkling and core shear. MATHLAB software was used to obtain theoretical results and compare them with numerical and experimental results. The strategies of composite sandwich structures depended on classical lamination theory. The program calculates the ply failures automatically by using the Tsai–Hill failure criterion for every combination of face sheet and core thicknesses.
{"title":"Structural Optimization of a Sandwich Panels Design for Minimum Weight Shipping and Airplane Containers","authors":"A. Al-Fatlawi, K. Jármai, G. Kovács","doi":"10.26649/musci.2019.036","DOIUrl":"https://doi.org/10.26649/musci.2019.036","url":null,"abstract":"There are many technical discussions between global manufacturing and development companies competing to design a lightweight container to satisfy the requirements of shipping and airline companies. In this study, a methodology for a minimum weight optimization for honeycomb core sandwich panels with composite face sheets is presented, which can be primarily used for manufacturing of the walls, floor and roof of containers. The honeycomb sandwich panels consisted of symmetric composite face sheets the face sheets consisted of E-glass / epoxy fiber-reinforced plastic. The lay-up of the fibers of the face sheets was limited to sets of plies having orientation angles of 0 and 90. The new lightweight containers provide considerable savings in weight and thus reduce fuel consumption or increase aircraft turnover compared to conventional containers (see Fig. 1). According to the International Air Transport Association (IATA) calculations, the weight of fuel required to carry 1kg additional weight per hour is 0.04 Kg. The weight of the sandwich structure panels considered is the objective function subject to constraints needed based on the stiffness, face sheets failure, skin wrinkling and core shear. MATHLAB software was used to obtain theoretical results and compare them with numerical and experimental results. The strategies of composite sandwich structures depended on classical lamination theory. The program calculates the ply failures automatically by using the Tsai–Hill failure criterion for every combination of face sheet and core thicknesses.","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"35 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":"128445224","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}
{"title":"Civil Law Assessment of Human Personality","authors":"Csenge Halász","doi":"10.26649/musci.2019.091","DOIUrl":"https://doi.org/10.26649/musci.2019.091","url":null,"abstract":"","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"23 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":"126264555","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}
{"title":"Effect of the Starch Addition on the Settling of Tisza River Mud","authors":"Ádám Benjámin Erdős","doi":"10.26649/musci.2019.005","DOIUrl":"https://doi.org/10.26649/musci.2019.005","url":null,"abstract":"","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"6 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":"127294736","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}
{"title":"Effect of Depth of Cut and Feed Rate on the Forces in Face Milling","authors":"M. Akkad, C. Felhő","doi":"10.26649/musci.2019.088","DOIUrl":"https://doi.org/10.26649/musci.2019.088","url":null,"abstract":"","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"15 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":"114507055","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}
Scrap based aluminium production is increasing rapidly, however it generates significant amounts of dross of high metallic content. It is common to treat the dross at high temperature in a rotary “converter” furnace to recover most of the entrapped metal. The efficiency of this process depends on many factors, and the Mg content of the metallic phase is important. We have examined an extensive industrial data base and carried out experiments with a laboratory scale rotary furnace to compare the tapped metal yields from dross tapes divided in groups by the Mg-concentrations of the “mother alloys” generating them primarily. It has been found that a medium Mg-content in the metallic phase can offer the best yields.
{"title":"The Effect of Mg-Content on the Efficiency of Metal Recovery by the Thermo-Mechanical Treatment of Aluminium Melting Dross","authors":"I. Illés, Balázs Hegedüs, T. Kékesi","doi":"10.26649/musci.2019.085","DOIUrl":"https://doi.org/10.26649/musci.2019.085","url":null,"abstract":"Scrap based aluminium production is increasing rapidly, however it generates significant amounts of dross of high metallic content. It is common to treat the dross at high temperature in a rotary “converter” furnace to recover most of the entrapped metal. The efficiency of this process depends on many factors, and the Mg content of the metallic phase is important. We have examined an extensive industrial data base and carried out experiments with a laboratory scale rotary furnace to compare the tapped metal yields from dross tapes divided in groups by the Mg-concentrations of the “mother alloys” generating them primarily. It has been found that a medium Mg-content in the metallic phase can offer the best yields.","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"38 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":"133374820","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}
In the study, the roughness characteristics of the surfaces produced with symmetrical milling experiments of steel were analyzed. The cutting speed was changed while the chip cross-section remained constant. The tool was equipped with a single insert with κ r =90°. In this article the 2D and 3D roughness characteristics are investigated; the average roughness (R a , S a ) and the profile height parameters (R z , S z ) were taken into account. The roughness measurements were made in five parallel planes, the change in roughness parameters was analyzed in different planes and the inhomogeneity of topography was shown in planes parallel to the direction of feed.
分析了钢的对称铣削加工表面的粗糙度特性。在切屑截面保持不变的情况下，改变切削速度。该工具配有一个κ r =90°的单刀片。本文对二维和三维粗糙度特性进行了研究;考虑了平均粗糙度(R a, sa)和轮廓高度参数(R z, S z)。在5个平行平面上进行了粗糙度测量，分析了不同平面上粗糙度参数的变化，并在平行进给方向的平面上显示了形貌的不均匀性。
{"title":"Effect of Cutting Speed on Surface Roughness: Face Milling of Steel with a Parallelogram Insert","authors":"A. Nagy, J. Kundrák","doi":"10.26649/musci.2019.090","DOIUrl":"https://doi.org/10.26649/musci.2019.090","url":null,"abstract":"In the study, the roughness characteristics of the surfaces produced with symmetrical milling experiments of steel were analyzed. The cutting speed was changed while the chip cross-section remained constant. The tool was equipped with a single insert with κ r =90°. In this article the 2D and 3D roughness characteristics are investigated; the average roughness (R a , S a ) and the profile height parameters (R z , S z ) were taken into account. The roughness measurements were made in five parallel planes, the change in roughness parameters was analyzed in different planes and the inhomogeneity of topography was shown in planes parallel to the direction of feed.","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"2 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":"131571681","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}
The object of this paper is the Saint-Venant torsion of homogeneous anisotropic cross section. The classes of anisotropy considered has at least one plane of elastic symmetry, which is normal to the axis of the beam. A new and very simple derivation is given to obtain the boundary contour of the non-warping anisotropic cross section. The determination of the torsional rigidity in terms of area of the cross section is also presented.
{"title":"Determination of the Prandtl's Stress Function for Non-Warping Anisotropic Cross Section","authors":"I. Ecsedi, Á. Lengyel, A. Baksa","doi":"10.26649/musci.2019.039","DOIUrl":"https://doi.org/10.26649/musci.2019.039","url":null,"abstract":"The object of this paper is the Saint-Venant torsion of homogeneous anisotropic cross section. The classes of anisotropy considered has at least one plane of elastic symmetry, which is normal to the axis of the beam. A new and very simple derivation is given to obtain the boundary contour of the non-warping anisotropic cross section. The determination of the torsional rigidity in terms of area of the cross section is also presented.","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","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":"130301304","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}
{"title":"Application of Magnetic and Geoelectrical Resistivity Sounding Methods in Groundwater Exploration in a Part of Central Sinai, Egypt","authors":"M. Abdelaziz","doi":"10.26649/musci.2019.079","DOIUrl":"https://doi.org/10.26649/musci.2019.079","url":null,"abstract":"","PeriodicalId":340250,"journal":{"name":"MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference","volume":"36 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":"130382611","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}
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