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Acta Mechanica Slovaca最新文献

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Resistance Spot Welding of Transformation- Induced Plasticity Steel RAK 40/70 变质诱发塑性钢rak40 /70的电阻点焊
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2021.014
Denis Cmorej, Ľ. Kaščák
{"title":"Resistance Spot Welding of Transformation- Induced Plasticity Steel RAK 40/70","authors":"Denis Cmorej, Ľ. Kaščák","doi":"10.21496/ams.2021.014","DOIUrl":"https://doi.org/10.21496/ams.2021.014","url":null,"abstract":"The paper deals with the analysis of the influence of the parameters of resistance spot welding. Resistance spot welding is high-efficiency process for joining metallic materials. The application of resistance spot welding is still the most used joining method for joining the car body parts. The influence of the parameters of resistance spot welding was determined by an experiment. The optimal parameters for achieving the highest load-bearing capacity of joints for the material TRIP40 / 70 with a defined thickness of 0.77 mm were determined. The results of resistance spot welding joints reached the values of load-bearing capacity from 6300N to 9000 N. The exact values parts of the experiment are shown in the paper.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129964000","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
Human Vital Signs Monitor 人体生命体征监测仪
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2021.033
T. Kelemenová, M. Kelemen, Ondrej Benedik, Ivana Koláriková, Matúš Svrčina, Filip Filakovský, Lukáš Leštach
{"title":"Human Vital Signs Monitor","authors":"T. Kelemenová, M. Kelemen, Ondrej Benedik, Ivana Koláriková, Matúš Svrčina, Filip Filakovský, Lukáš Leštach","doi":"10.21496/ams.2021.033","DOIUrl":"https://doi.org/10.21496/ams.2021.033","url":null,"abstract":"The article deals with the analysis of human vital signs and the design of a low-cost device for monitoring these quantities for domestic use. The aim is to make such devices available for home use and preliminary diagnostics. The article presents the results of experiments with commercially available sensors designed to measure these quantities.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123142061","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
Analysis of the Working Environment with a Focus on Laboratory Lightning 以实验室雷电为重点的工作环境分析
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2021.020
Gabriela Dancáková, Viktória Holoďáková, T. Tóth, S. Lancoš, R. Hudák
{"title":"Analysis of the Working Environment with a Focus on Laboratory Lightning","authors":"Gabriela Dancáková, Viktória Holoďáková, T. Tóth, S. Lancoš, R. Hudák","doi":"10.21496/ams.2021.020","DOIUrl":"https://doi.org/10.21496/ams.2021.020","url":null,"abstract":"The aim of the publication is ergonomic analysis and evaluation of lighting physical parameters for selected laboratory of the Faculty of Mechanical Engineering at Technical University of Košice. The reason for the analysis is planned modernization of the laboratory and the identification of possible environmental risk factors for their optimization during the modernization process. The results of the measurements were assessed regarding the valid standards. In case of unsatisfactory conditions, their optimization was proposed, meeting the ergonomic, safety and hygienic parameters according to the valid legislation.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122247515","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
The Adaptive Approach to Measurements of Deviations of Cylindrical Parts 圆柱形零件偏差测量的自适应方法
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2021.037
S. Adamczak, D. Janecki, K. Stępień
{"title":"The Adaptive Approach to Measurements of Deviations of Cylindrical Parts","authors":"S. Adamczak, D. Janecki, K. Stępień","doi":"10.21496/ams.2021.037","DOIUrl":"https://doi.org/10.21496/ams.2021.037","url":null,"abstract":"Measurements of form deviations of 3D elements can be conducted with various strategies. Such strategies differ in a number and distribution of sampling points located on an investigated surface. The low number of sampling points can bring about the situation that some surface irregularities cannot be detected by a measuring system. An application of higher density of sampling points, in turn, results in significant lengthening of measurement time, which is undesirable. This is why the authors propose to develop a novel adaptive measurement strategy. Proposed adaptive strategy consists of two stages: a preliminary measurement and additional measurements. During the preliminary measurement, an investigated area is scanned along a preselected trajectory. If the measurement results show that there is a significant change in sensor readings in a certain fragment of an investigated surface, then we conduct additional measurements in the area where the large change in sensor readings occurred. The paper presents the state-of-the-art on contemporary measurement strategies of 3D elements and fundamentals of the adaptive strategy proposed by the authors.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134620812","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
Optimal Motion of a Motor Cycle Rider on Sudden Halt 摩托车骑手突然停车时的最佳运动
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2022.002
C. Chattoraj
{"title":"Optimal Motion of a Motor Cycle Rider on Sudden Halt","authors":"C. Chattoraj","doi":"10.21496/ams.2022.002","DOIUrl":"https://doi.org/10.21496/ams.2022.002","url":null,"abstract":"In this paper, a new concept has been proposed to theoretically analyze the forces and torques on the upper body of a human riding on a two wheeler while facing a sudden halt/crash. This approach is applied to different joints by using a musculoskeletal model of the upper body. The optimal motion of the upper body during the sudden halt/crash is obtained by converting the multi degree of freedom control problem to a parameter based problem to study the nature and modes of response following a shock. A mathematical model with reduced degrees of freedom is proposed that retains the essential features of the motion most probable in the direction of the original velocity and the same (a non-linear formulation) is numerically investigated to find out the forces and torques on the thorasic trunk and the head-neck with the waist joint together with the displacements.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125976750","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
Digital Transformation as a Strategy of Value Creation in Industry 数字化转型是工业价值创造的战略
Acta Mechanica Slovaca Pub Date : 2021-09-29 DOI: 10.21496/ams.2021.027
Kristína Ľachová
{"title":"Digital Transformation as a Strategy of Value Creation in Industry","authors":"Kristína Ľachová","doi":"10.21496/ams.2021.027","DOIUrl":"https://doi.org/10.21496/ams.2021.027","url":null,"abstract":"The strategies of many organizations have recently included digital transformation. Digital initiatives in enterprises have proven to be essential tools for ensuring the sustainability of business processes. Trends from previous periods remain relevant, but the priorities for their deployment are changing and speed of implementation of advanced digital technologies is accelerating. This article focusses on digital transformation as a key future strategy along with","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126635386","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
Temperature Dependent Mechanical Properties of Natural and Synthetic Rubber in Practical Structures 天然橡胶和合成橡胶在实际结构中随温度变化的机械性能
Acta Mechanica Slovaca Pub Date : 2021-09-29 DOI: 10.21496/ams.2021.031
Samiul Kaiser, R. Rabbani, Reaz Ahmed, S. Kaiser
{"title":"Temperature Dependent Mechanical Properties of Natural and Synthetic Rubber in Practical Structures","authors":"Samiul Kaiser, R. Rabbani, Reaz Ahmed, S. Kaiser","doi":"10.21496/ams.2021.031","DOIUrl":"https://doi.org/10.21496/ams.2021.031","url":null,"abstract":"In this proposal the mechanical properties of natural and synthetic rubbers are studied under different temperatures both real and ageing heat treatment conditions. For this purpose, tire rubber and bearing pad rubber are considered as they are most governed in natural and synthetic rubber respectively. The experimental results confirm that the impact of real temperature is higher on the mechanical properties than that of ageing temperature because of ambient temperature aggravate thermal motion and changes the molecular arrangement of rubber other than the ageing samples recovers the mechanical properties during breezy. Except hardness, all the cases in terms of mechanical properties like tensile strength, elongation, Young’s modulus and Poisson’s ratio of bearing pad rubber provide the higher performance than the tire rubber. Under ageing treatment condition the degraded mechanical properties recover well by the natural rubber since extremely ordered long chain of the molecular structure. The significant differences in the micrographs of the two rubbers suggest that tire rubber consists of uniform grains because of its highly controlled molecular arrangement. Under heat treatment the microstructure turned rougher and the size of the voids became larger as temperature increases the secondary cross linking reaction which initiate to cracks.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124354415","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
Optical Distance Sensors 光学距离传感器
Acta Mechanica Slovaca Pub Date : 2021-09-29 DOI: 10.21496/ams.2021.034
Arihant Siyal
{"title":"Optical Distance Sensors","authors":"Arihant Siyal","doi":"10.21496/ams.2021.034","DOIUrl":"https://doi.org/10.21496/ams.2021.034","url":null,"abstract":"The article deals with three optical distance sensors, which are mounted on an apparatus so that they could be tested, compared & analysed. This study can be a helping hand in future for the people who want to acquire any particular detail or information on any one of these sensors. This research work adds another information about tested sensor for anyone trying to get hands on information for the three sensors or their applications.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122324315","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
Optimizing Performance of Porcelain Insulators: How does Particle Size Influence Dielectric and Mechanical Strengths? 优化瓷绝缘体性能:粒度如何影响介电强度和机械强度?
Acta Mechanica Slovaca Pub Date : 2021-06-25 DOI: 10.21496/ams.2021.017
T. Ologunwa, T. Akinbogun, R. Frischer, I. Kashim, K. Kuča, O. Krejcar, O. Fadeyi
{"title":"Optimizing Performance of Porcelain Insulators: How does Particle Size Influence Dielectric and Mechanical Strengths?","authors":"T. Ologunwa, T. Akinbogun, R. Frischer, I. Kashim, K. Kuča, O. Krejcar, O. Fadeyi","doi":"10.21496/ams.2021.017","DOIUrl":"https://doi.org/10.21496/ams.2021.017","url":null,"abstract":"Porcelain insulators are mostly created from the combination of the particles of Clay, Silica, Kaolin, and Feldspar. This implies that different particle sizes contribute to the insulating properties of the materials. In this paper, we attempt to create a set of model porcelain materials by critically analysing the particle sizes that are most likely to yield the best insulator results. Materials sourced from Edo State, Nigeria were processed to produce Porcelain insulator samples. For each of the component minerals, a 65g mass was compacted and pressed at 500 Psi (3.4 KN) into a steel cylindrical mould via hydraulic press, this was closely followed by firing at 1200°C. Porosity, bulk density, insulation volume resistivity, as well as dielectric strength, and their relationship with particle sizes were evaluated. Results obtained showed that porosity of the Porcelain materials shared a direct relation with particle sizes, while the bulk density showed an inverse relationship. It was also observed that the 150 µm particles yielded the most effective insulators, given higher insulation volume resistivity and dielectric strength. Altering particle size from 150 µm tends to lower the insulation volume resistivity and dielectric strength.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114654580","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
Uncertainty of Temperature Measurement in Working Environment 工作环境温度测量的不确定度
Acta Mechanica Slovaca Pub Date : 2020-08-22 DOI: 10.21496/ams.2019.020
T. Kelemenová, M. Kelemen
{"title":"Uncertainty of Temperature Measurement in Working Environment","authors":"T. Kelemenová, M. Kelemen","doi":"10.21496/ams.2019.020","DOIUrl":"https://doi.org/10.21496/ams.2019.020","url":null,"abstract":"The uncertainty of measurement is a key component of expressing of measurement result. Knowledge of uncertainty is needed for balance of the process reliability. Every measurement device is not perfect and producer has to declare the maximum accuracy of the device and this can be used as a part of uncertainty. Paper deals with uncertainty analysis of temperature process measurement inside the working environment.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"53 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131686868","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
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