Acta Mechanica et Automatica最新文献_第4页

Numerical Study of the Mechanical Behaviour and Damage of FGM Bent Pipes Under Internal Pressure and Combined Bending Moment 内压和复合弯矩作用下FGM弯管力学行为及损伤的数值研究

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-16 DOI: 10.2478/ama-2023-0053

Amin Houari, K. Madani, Salah Amroune, L. Zouambi, M. Elajrami

{"title":"Numerical Study of the Mechanical Behaviour and Damage of FGM Bent Pipes Under Internal Pressure and Combined Bending Moment","authors":"Amin Houari, K. Madani, Salah Amroune, L. Zouambi, M. Elajrami","doi":"10.2478/ama-2023-0053","DOIUrl":"https://doi.org/10.2478/ama-2023-0053","url":null,"abstract":"Abstract The main objective of this work is the numerical prediction of the mechanical behaviour up to the damage of the bends of the functionally graded material (FGM) type ceramic/metal pipes. Firstly, the effective elastoplastic proper-ties of bent FGM pipes were determined using the homogenisation law by the Mori–Tanaka models for the elastic part and TTO (Tamura-Tomota-Ozawa) for the plastic part based on a rule of mixtures per function in the form of a power law. Our work also aims at the use of a meshing method (UMM) to predict the behaviour of the FGM by finite element in the mesh of the model. The analysis was performed using the UMM technique for different loading cases and volume fraction distribution. Two stages are necessary for the analysis of the damage: the first is the model of initiation of the damage established by the criterion of maximum deformation named MAXPE and the second is criterion of the energy of the rupture according to the theory Hillerborg used to determine damage evolution. Both stages involve a 3D finite element method analysis. However, for damage, the XFEM technique was used in our UMM method to predict crack initiation and propagation in FGM pipe bends. The results of the numerical analysis concerning the mechanical behavior showed, that if the nature of the bent pipes is in FGM, a good reduction of the various stresses compared to those where the nature of the pipe is metallic material. The results were presented in the form of a force–displacement curve. The validation of the proposed numerical methodology is highlighted by comparisons of current results with results from the literature, which showed good agreement. The analysis took into account the effect of the main parameters in a bent FGM pipe under internal pressure and bending moment on the variation of the force–strain curves.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"460 - 468"},"PeriodicalIF":0.7,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48370014","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

Neural Control of a Robotic Manipulator in Contact with a Flexible and Uncertain Environment 柔性不确定环境下机器人机械手的神经控制

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-15 DOI: 10.2478/ama-2023-0050

P. Gierlak

引用次数: 0

Formation of Information Base for Controlling Settlement of Solid-Phase Ore Slurry Particles in a Thickener 浓密机固相矿浆颗粒沉降控制信息库的建立

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-15 DOI: 10.2478/ama-2023-0047

V. Morkun, N. Morkun, V. Tron, O. Serdiuk, A. Haponenko, I. Haponenko

引用次数: 0

A Supervisory Control System for Automation of Horizontal Form-Fill-Seal Packaging Plant Based on Modified Atmosphere Technology 基于改性气氛技术的卧式填料密封包装厂自动化监控系统

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-15 DOI: 10.2478/ama-2023-0049

M. R. Seifi, R. Alimardani, S. Mohtasebi, H. Mobli, Maumoud Soltani Firouz

{"title":"A Supervisory Control System for Automation of Horizontal Form-Fill-Seal Packaging Plant Based on Modified Atmosphere Technology","authors":"M. R. Seifi, R. Alimardani, S. Mohtasebi, H. Mobli, Maumoud Soltani Firouz","doi":"10.2478/ama-2023-0049","DOIUrl":"https://doi.org/10.2478/ama-2023-0049","url":null,"abstract":"Abstract The packaging industry is one of the most important parts of agricultural products processing. A popular method of increasing the shelf life of agricultural products is modified atmosphere packaging (MAP). The main objective of this paper was to increase the adaptability and flexibility of the machines for packaging of different vegetables including lettuces, broccolis, cabbages, cauliflowers, etc. To achieve this goal, a supervisory control and data acquisition (SCADA)-based system was designed and developed for controlling and monitoring of MAP process of fresh vegetables. The system was divided into three physical layers: field devices, remote terminal unit (RTU) and master terminal unit (MTU). For packaging width adjuster system, the R2, maximum error (ME), mean absolute error (MAE) and root mean square error (RMSE) were obtained as 0.999, 8 mm, 2.96 mm and 3.44 mm, respectively. For packaging height adjuster system, the R2, ME, MAE and RMSE were obtained as 0.994, 10 mm, 3.53 mm and 4.57 mm, respectively. The SCADA system can be able to accurately adjust the speed of the conveyor and the temperature of the sealing jaws, based on the desired values. For gas injection unit, the value of 1.66 L/min, 0.557 L/min and 0.667 L/min were recorded for ME, MAE and RMSE, respectively. Four types of trends including temperature, speed, flow and digital parameter trends were designed. In addition to displaying screen alarms, the occurred alarms are stored, automatically as a text file for troubleshooting. Finally, the results showed that the designed system can be reliably used for MAP of various varieties of fresh vegetables.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"423 - 434"},"PeriodicalIF":0.7,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49660034","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

Method of Machining Centre Sliding System Fault Detection using Torque Signals and Autoencoder 基于转矩信号和自动编码器的加工中心滑动系统故障检测方法

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-15 DOI: 10.2478/ama-2023-0051

Damian Augustyn, M. Fidali

{"title":"Method of Machining Centre Sliding System Fault Detection using Torque Signals and Autoencoder","authors":"Damian Augustyn, M. Fidali","doi":"10.2478/ama-2023-0051","DOIUrl":"https://doi.org/10.2478/ama-2023-0051","url":null,"abstract":"Abstract The sliding system of machining centres often causes maintenance and process problems. Improper operation of the sliding system can result from wear of mechanical parts and drives faults. To detect the faulty operation of the sliding system, measurements of the torque of its servomotors can be used. Servomotor controllers can measure motor current, which can be used to calculate motor torque. For research purposes, the authors used a set of torque signals from the machining centre servomotors that were acquired over a long period. The signals were collected during a diagnostic test programmed in the machining centre controller and performed once per day. In this article, a method for detecting anomalies in torque signals was presented for the condition assessment of the machining centre sliding systems. During the research, an autoencoder was used to detect the anomaly, and the condition was assessed based on the value of the reconstruction error. The results indicate that the anomaly detection method using an autoencoder is an effective solution for detecting damage to the sliding system and can be easily used in a condition monitoring system.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"445 - 451"},"PeriodicalIF":0.7,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41376881","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

Approximate Solution of Painlevé Equation I by Natural Decomposition Method and Laplace Decomposition Method 用自然分解法和拉普拉斯分解法近似求解Painlevé方程I

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-15 DOI: 10.2478/ama-2023-0048

Muhammad Amir, J. A. Haider, Shahbaz Ahmad, Sana Gul, Asifa Ashraf

{"title":"Approximate Solution of Painlevé Equation I by Natural Decomposition Method and Laplace Decomposition Method","authors":"Muhammad Amir, J. A. Haider, Shahbaz Ahmad, Sana Gul, Asifa Ashraf","doi":"10.2478/ama-2023-0048","DOIUrl":"https://doi.org/10.2478/ama-2023-0048","url":null,"abstract":"Abstract The Painlevé equations and their solutions occur in some areas of theoretical physics, pure and applied mathematics. This paper applies natural decomposition method (NDM) and Laplace decomposition method (LDM) to solve the second-order Painlevé equation. These methods are based on the Adomain polynomial to find the non-linear term in the differential equation. The approximate solution of Painlevé equations is determined in the series form, and recursive relation is used to calculate the remaining components. The results are compared with the existing numerical solutions in the literature to demonstrate the efficiency and validity of the proposed methods. Using these methods, we can properly handle a class of non-linear partial differential equations (NLPDEs) simply. Novelty One of the key novelties of the Painlevé equations is their remarkable property of having only movable singularities, which means that their solutions do not have any singularities that are fixed in position. This property makes the Painlevé equations particularly useful in the study of non-linear systems, as it allows for the construction of exact solutions in certain cases. Another important feature of the Painlevé equations is their appearance in diverse fields such as statistical mechanics, random matrix theory and soliton theory. This has led to a wide range of applications, including the study of random processes, the dynamics of fluids and the behaviour of non-linear waves.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"417 - 422"},"PeriodicalIF":0.7,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49558793","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

Development of a Test Rig for the Measurement of Small Wind Turbines in a Wind Tunnel 小型风力机风洞测量试验台的研制

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-11 DOI: 10.2478/ama-2023-0044

H. Meironke, T. Panten, Martin Hayduk, Frieder Strubel

引用次数: 0

Stability Investigation of the PCM Nanocomposites PCM纳米复合材料的稳定性研究

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-11 DOI: 10.2478/ama-2023-0043

J. Cieśliński, Paulina Boroń, Maciej Fabrykiewicz

引用次数: 0

Adaptation and Application of a Polarisation Curve Test Protocol for a Commercial Pem Electrolyser on Cell and Stack Level 商用Pem电解槽和电池组级极化曲线测试方案的适应和应用

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-11 DOI: 10.2478/ama-2023-0045

Nicol Daniela Jaramillo Rodríguez, Aline Luxa, L. Jürgensen

{"title":"Adaptation and Application of a Polarisation Curve Test Protocol for a Commercial Pem Electrolyser on Cell and Stack Level","authors":"Nicol Daniela Jaramillo Rodríguez, Aline Luxa, L. Jürgensen","doi":"10.2478/ama-2023-0045","DOIUrl":"https://doi.org/10.2478/ama-2023-0045","url":null,"abstract":"Abstract The present study aims to develop a test protocol based on the literature for electrochemical characterisation of a polymer electrolyte membrane (PEM) electrolysis commercial stack using polarisation curves. For this, a 1-kW water electrolysis test stand with integrated temperature control and measurement systems was built around the stack. Afterwards, the stack performance was characterised under different operating pressure and temperature conditions by using polarisation curves. A measurement protocol was developed based on the literature. To ensure the reproducibility of the results, two rounds of experiments were performed. The experiments were carried out at temperatures between 20 and 60 °C and pressures up to 15 bar. The results show distinct regions in the polarisation curves related to the activation and ohmic overvoltage. The effect of temperature and pressure on the performance is shown and analysed. The performance of single cells in the stack is also measured. The stack polarisation curves are compared with those in the literature, which gives an understanding of the materials used in electrodes and types of membranes.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"395 - 404"},"PeriodicalIF":0.7,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47401994","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

Solution of Fractional Heat-Like and Fractional Wave-Like Equation by Using Modern Strategy 用现代策略求解分数阶类热方程和分数阶类波方程

IF 0.7

Acta Mechanica et Automatica Pub Date : 2023-07-11 DOI: 10.2478/ama-2023-0042

Mohamed Z. Mohamed, A. Hamza, T. Elzaki, Mohamed S. Algolam, Shiraz Elhussein

{"title":"Solution of Fractional Heat-Like and Fractional Wave-Like Equation by Using Modern Strategy","authors":"Mohamed Z. Mohamed, A. Hamza, T. Elzaki, Mohamed S. Algolam, Shiraz Elhussein","doi":"10.2478/ama-2023-0042","DOIUrl":"https://doi.org/10.2478/ama-2023-0042","url":null,"abstract":"Abstract This paper introduces a novel form of the Adomian decomposition (ADM) method for solving fractional-order heat-like and wave-like equations with starting and boundary value problems. The derivations are provided in the sense of Caputo. In order to help understanding, the generalised formulation of the current approach is provided. Several numerical examples of fractional-order diffusion-wave equations (FDWEs) are solved using the suggested method in this context. In addition to examining the applicability of the suggested method to the solving of fractional-order heat-like and wave-like equations, a graphical depiction of the solutions to three instructive cases was constructed. Solution graphs were arrived at for integer and fractional-order problems. The derived and exact solutions to integer-order problems were found to be in excellent agreement. The subject of the present research endeavour is the convergence of fractional-order solutions. This strategy is considered to be the most successful way of addressing fractional-order initial-boundary value issues in science and engineering. This strategy is presented here.","PeriodicalId":44942,"journal":{"name":"Acta Mechanica et Automatica","volume":"17 1","pages":"372 - 380"},"PeriodicalIF":0.7,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47021746","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