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Acta Mechanica Slovaca最新文献

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Chimney Cleaning and Inspection Robot 烟囱清洁和检查机器人
Acta Mechanica Slovaca Pub Date : 2019-11-01 DOI: 10.21496/ams.2019.016
Peter Marcinko, Ivan Virgala, Ľ. Miková, E. Prada, T. Kelemenová, M. Kelemen, Martin Varga
{"title":"Chimney Cleaning and Inspection Robot","authors":"Peter Marcinko, Ivan Virgala, Ľ. Miková, E. Prada, T. Kelemenová, M. Kelemen, Martin Varga","doi":"10.21496/ams.2019.016","DOIUrl":"https://doi.org/10.21496/ams.2019.016","url":null,"abstract":"The paper deals with robot, which locomotes inside chimney for cleaning and inspection purposes. Carbon particles are in sediments on inner chimney wall. Chimney has to be periodically cleaned and inspected because of fire risk. Paper introduces concept of service robot for this application. Tracked locomotion has been selected as principle of locomotion inside chimney.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122413439","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: 3
Investigation of Injection Shrinkage of Composite Moldings with Mineral Filler 矿物填料对复合材料注塑收缩的影响
Acta Mechanica Slovaca Pub Date : 2019-11-01 DOI: 10.21496/ams.2020.003
T. Jachowicz, V. Krasinskyi
{"title":"Investigation of Injection Shrinkage of Composite Moldings with Mineral Filler","authors":"T. Jachowicz, V. Krasinskyi","doi":"10.21496/ams.2020.003","DOIUrl":"https://doi.org/10.21496/ams.2020.003","url":null,"abstract":"The paper presents the injection shrinkage of composite moldings with mineral filler phenomenon. The definition of shrinkage and shrinkage types are described. The main factors affecting shrinkage value of injection-molded part are discussed. Based on the experimental tests conducted using injection-molded parts made from polypropylene filled with glass fiber and talc, the dependence of injection-molded part shrinkage on filler content and selected parameters of the injection molding process has been determined.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125621051","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
Physical-mechanical Properties of Metal-filled Hydrogel Films, Obtained by Centrifugal Molding 离心成型制备金属填充水凝胶膜的物理力学性能
Acta Mechanica Slovaca Pub Date : 2019-11-01 DOI: 10.21496/ams.2019.024
O. Grytsenko, O. Suberlyak, V. Krasinskyi, V. Moravskyi, B. Berezhnyy
{"title":"Physical-mechanical Properties of Metal-filled Hydrogel Films, Obtained by Centrifugal Molding","authors":"O. Grytsenko, O. Suberlyak, V. Krasinskyi, V. Moravskyi, B. Berezhnyy","doi":"10.21496/ams.2019.024","DOIUrl":"https://doi.org/10.21496/ams.2019.024","url":null,"abstract":"Metal-filled hydrogel films based on polyvinylpyrrolidone with 2-hydroxyethyl methacrylate copolymers were obtained by centrifugal method. It is determined the influence of the content of metal powder filler, technological parameters of processing and formulation of initial polymer-monomer composition on the physical-mechanical properties of the obtained composition film materials. It was determined that obtained metal-filled films are characterized by the anisotropy of the physical-mechanical properties of surfaces.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127880145","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
Analysis of Metallic Materials used for Manufacturing of Extruders Screws 挤出机螺杆用金属材料分析
Acta Mechanica Slovaca Pub Date : 2019-11-01 DOI: 10.21496/ams.2019.023
A. Dziubińska, J. Sikora
{"title":"Analysis of Metallic Materials used for Manufacturing of Extruders Screws","authors":"A. Dziubińska, J. Sikora","doi":"10.21496/ams.2019.023","DOIUrl":"https://doi.org/10.21496/ams.2019.023","url":null,"abstract":"Received: 2019.05.21 Revised: 2019.06.05 Accepted: 2019.08.27 Available online: 2019.09.15 Abstract: The article presents a review of metallic materials used for manufacturing of extruders screws. The analysis is carried out for the NEWEX project, which aims to develop and test an innovative extruder [1-2]. The collected knowledge about the materials used to date to produce screws of extrusion machines and methods of increasing their service life will allow to design a new extruder consisting of materials of the highest quality and durability. Currently the screws are usually manufactured from steels for nitriding, heat resisting steels, tool steels and stainless steels. The study provides an analysis of the chemical composition and mechanical properties of the most commonly used material types. Among those, the following types of steels for nitriding, in accordance with the standard PN-EN 10085:2003 can be distinguished: 34CrAlNi7-10, 34CrAlMo5-10, 31CrMoV9. The type of heat resisting steel used for screws of extrusion machines is 14CrMoV6-9 according to the standard PN-H-84024:1975 (withdrawn without replacement). The most commonly used tool steels are X37CrMoV5-1 and X153CrMoV12 according to the standard PN-EN ISO 4957:2018-09. Among the stainless steels of the standard PN-EN 10088-1:2014-12 the steels X90CrMoV18 and X39CrMo17-1 are used in the production of screws. The study also presents methods of increasing the durability and strength of the screws of extrusion machines, including surface treatment processes. These processes include: hardening, surfacing and coating, as well as thermochemical treatment in the form of: carburising, nitriding and sintering.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123361409","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
On Coupling of Interface and Phase-field Damage Models for Quasi-brittle Fracture 准脆性断裂界面与相场损伤模型耦合研究
Acta Mechanica Slovaca Pub Date : 2019-11-01 DOI: 10.21496/ams.2019.021
R. Vodička
{"title":"On Coupling of Interface and Phase-field Damage Models for Quasi-brittle Fracture","authors":"R. Vodička","doi":"10.21496/ams.2019.021","DOIUrl":"https://doi.org/10.21496/ams.2019.021","url":null,"abstract":"Numerical simulations of crack initiation and propagation is presented. Both, interface and material cracks are modelled within the damage theory introducing two independent damage parameters. The interface cracks appearing in an adhesive layer of a contact zone between structural components consider cohesive zone models with general stress-strain relationships implemented in an energetic formulation. Accordingly, the fracture of bulk domains also includes variational consideration and leads to phase-field damage which causes a very narrow band of defected material constituting the actual crack. The proposed computational approach has a variational form, the solution being approximated by a time stepping procedure, a finite element code, and quadratic programming algorithms.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115130128","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: 5
Numerical Analysis of the New Concept of Screw of an Extruder for Polymer Materials 高分子材料挤出机螺杆新概念的数值分析
Acta Mechanica Slovaca Pub Date : 2019-09-27 DOI: 10.21496/ams.2020.002
H. Dębski, P. Wysmulski
{"title":"Numerical Analysis of the New Concept of Screw of an Extruder for Polymer Materials","authors":"H. Dębski, P. Wysmulski","doi":"10.21496/ams.2020.002","DOIUrl":"https://doi.org/10.21496/ams.2020.002","url":null,"abstract":"The article introduces an innovative concept of a screw of an extruder used for granulation of polymer materials. Three construction solutions were introduced, differing in the construction parameters of the screw. The scope of the research included the numerical strength-thermal analysis of the introduced construction solutions of the screw. The analysis was conducted using the finite element method. Numerical calculations were a thermally coupled FEM analysis, posing a geometrically and thermally nonlinear problem. The obtained results confirmed the sufficient strength of the structure of the screw, subjected to both the pressure caused by the transport of polymer granules as well as the temperature generated by the friction of the granules on the surface of the screw. The numerical tool applied in the research was the commercial program ABAQUS®.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124719265","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
Reducing the Costs of Automated Production Systems 降低自动化生产系统的成本
Acta Mechanica Slovaca Pub Date : 2019-06-28 DOI: 10.21496/ams.2019.013
K. Novikov, Pavel Vránek, J. Kleinová, M. Simon
{"title":"Reducing the Costs of Automated Production Systems","authors":"K. Novikov, Pavel Vránek, J. Kleinová, M. Simon","doi":"10.21496/ams.2019.013","DOIUrl":"https://doi.org/10.21496/ams.2019.013","url":null,"abstract":"Received: 2019.04.09 Revised: 2019.04.12 Accepted: 2019.05.16 Available online: 2019.03.15 Abstract: This paper focuses on the comparison of production costs between two identical production units that are located in different countries. The trends in the field of production are dramatically changing due to the Fourth Industrial Revolution and companies have to manage production costs very thoroughly to increase their competitiveness. The aim of this paper is a cost evaluation of automated manufacturing systems, mainly considering the impact of personnel costs on costs of production. It also includes a case study with calculation performed on a full cost basis. The outcome should demonstrate the difference in production costs of before mentioned units and prove whether the personnel costs of automated production systems do have a significant impact on production costs.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127380622","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
Investigation of Composite Materials based on Modified Novolac Phenol-Formaldehyde Resin 改性酚醛树脂复合材料的研究
Acta Mechanica Slovaca Pub Date : 2019-02-01 DOI: 10.21496/AMS.2018.030
V. Krasinskyi, O. Suberlyak
{"title":"Investigation of Composite Materials based on Modified Novolac Phenol-Formaldehyde Resin","authors":"V. Krasinskyi, O. Suberlyak","doi":"10.21496/AMS.2018.030","DOIUrl":"https://doi.org/10.21496/AMS.2018.030","url":null,"abstract":"It was determined that novolac phenol-formaldehyde resin modification by polyvinylpyrrolidone and epoxy-dianic resin results in a significant improvement of thixotropic characteristics and enamel technological effectiveness and in physico-mechanical properties and thermostability improvement as well. The developed modified composition is characterized by high index of thixotropy in contrast to phenol-formaldehyde resin containing urotropine.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115326814","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
Analysis of CMT weld Clads for High-pressure die Casting Mold Restoration 高压压铸模具修复用CMT焊层分析
Acta Mechanica Slovaca Pub Date : 2019-02-01 DOI: 10.21496/AMS.2018.032
J. Brezinová, M. Džupon, M. Vojtko, V. Puchý, O. Milkovič, J. Březina, P. Maruschak, A. Guzanová
{"title":"Analysis of CMT weld Clads for High-pressure die Casting Mold Restoration","authors":"J. Brezinová, M. Džupon, M. Vojtko, V. Puchý, O. Milkovič, J. Březina, P. Maruschak, A. Guzanová","doi":"10.21496/AMS.2018.032","DOIUrl":"https://doi.org/10.21496/AMS.2018.032","url":null,"abstract":"The paper presents results of the research focused on the possibility of restoration of the shape parts of molds made of X15CrNiSi20-12 heat resistant austenitic chromium-nickel-stainless steel working in high-pressure die casting of aluminum alloys by clad welding. There were tested two welding wires - Thermanit 625 and Thermanit X, deposited on X15CrNiSi20-12 tool steel using cold metal transfer (CTM) welding in protective atmosphere of Ar. Two important properties of welded clads were tested - resistance of welds against dissolution in molten aluminum alloy AlSi8Cu3 and wear resistance of welds. Resistance of welds against dissolution were assessed by exposition of welded clads in aluminum melt for 120 and 300 minutes. The EDX semiquantitative microanalyses of element distribution were performed at the welding-melt interface, also build-ups were observed on the surface of welded clads. Wear resistance of the welded clads was tested using pin-on-disk test at room temperature. Results were compared to reference material - base tool steel X15CrNiSi20-12.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115549293","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
Determination of the Hole-flangeability for thin Sheets 薄板孔法兰度的测定
Acta Mechanica Slovaca Pub Date : 2019-02-01 DOI: 10.21496/AMS.2018.033
F. Stachowicz
{"title":"Determination of the Hole-flangeability for thin Sheets","authors":"F. Stachowicz","doi":"10.21496/AMS.2018.033","DOIUrl":"https://doi.org/10.21496/AMS.2018.033","url":null,"abstract":"Sheet metal stretching is one of the most frequently applied sheets forming operation in the industry. Hole flanging is a common sheet forming operation to produce structural sheet metal components. Flanges are used for appearance, rigidity, hidden joints, and strengthening of the edge of sheet metal parts. Trial-end-error is the most common approach for tooling and process design in flanging operations. This paper presents some experimental results of hole-flanging process performed on flat deep drawing steel sheets with circular hole drilled or punched in the centre of blank. Three punches of different geometry i.e. cylindrical, hemispherical and conical were used in this experiment. The effect of both the punch geometry and material mechanical parameters (especially strain hardening and plastic anisotropy) on the limit expansion of the hole, limit strain dependence on hole performing technology as well as sheet thickness distribution along collar formed was determined.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129981778","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
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