Computer Methods in Material Science最新文献_第9页

Bisection weighted by element size ordering algorithm for multi-frontal solver executed over 3D h refined grids 三维精细网格上的多正面求解算法

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.1.0560

M. Skotniczny, M. Paszyński, A. Paszyńska

引用次数: 0

Impact of the saturation current IS and ideality factor N on the performance of the characteristic (I-V) of a solar cell 饱和电流IS和理想因数N对太阳能电池特性(I-V)性能的影响

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2019.4.0646

M. Khalis, R. Masrour, Y. Mir, M. Zazoui

引用次数: 1

Vision system to support determination of mechanical properties of tubes required for computer modelling of tube hydroforming 用于支持管子液压成形计算机建模所需的管子机械性能测定的视觉系统

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.1.0554

H. Sadłowska, A. Kocańda, C. Jasiński, Ł. Morawiński

引用次数: 0

Data management in CUDA Programming for High Bandwidth Memory in GPU Accelerators GPU加速器中高带宽存储器的CUDA编程中的数据管理

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.3.0580

Grzegorz Korpała

引用次数: 0

Numerical analysis of data transfer quality in the 3D multi-scale uncoupled concurrent model connected with DMR 基于DMR的三维多尺度非耦合并行模型数据传输质量的数值分析

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.2.0564

J. Szyndler, K. Perzyński, Ł. Madej

引用次数: 3

Real-time evolutionary optimization of metallurgical processes using ARM microcontroller 基于ARM微控制器的冶金过程实时演化优化

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.1.0556

A. Mrózek, W. Kuś, Ł. Sztangret

{"title":"Real-time evolutionary optimization of metallurgical processes using ARM microcontroller","authors":"A. Mrózek, W. Kuś, Ł. Sztangret","doi":"10.7494/cmms.2016.1.0556","DOIUrl":"https://doi.org/10.7494/cmms.2016.1.0556","url":null,"abstract":"The real time (RT) computations with the use of microcontrollers have been present in everyday life for years. They are very useful in e.g. online control of processes due to the ability to determine the proper control in case of any environment changes. The algorithms employed in RT computation must be as simple as possible to meet the imposed time limits. On the other hand, the continuous increase in computational power of modern microcontrollers and embedded platforms causes that more complex algorithms can be performed in the real time. However, during implementation of any algorithm the specific structure and requirements of the microcontroller must be taken into consideration. Another way of fulfilling the time limits of the RT computations is application of metamodel instead of model of controlling process. Within this paper the possibility of application of evolutionary algorithm (EA) to solve three chosen optimization problems in real time using microcontroller of ARM architecture was considered. Analyzed optimization problems were as follows aluminum alloy anti-collision side beam hot stamping process, laminar cooling of dual phase (DP) steel sheets and minimization of the potential energy of the atomic clusters. All computations were performed using two different approaches i.e. low-level and object- oriented approach. Obtained results and drawn conclusions are presented.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"118 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":"125993133","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

A simulation study on the closed-loop control of screw press forgings using the impact energy as control input 以冲击能为控制输入的螺旋压力机锻件闭环控制仿真研究

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2018.3.0618

M. Bambach, B. Sydow, M. Hirtler, A. Sviridov

{"title":"A simulation study on the closed-loop control of screw press forgings using the impact energy as control input","authors":"M. Bambach, B. Sydow, M. Hirtler, A. Sviridov","doi":"10.7494/cmms.2018.3.0618","DOIUrl":"https://doi.org/10.7494/cmms.2018.3.0618","url":null,"abstract":"Screw presses are energy-restricted forming machines that use rotational energy stored in a flywheel for forming, which is converted into a linear movement by a threaded screw. Screw presses are widely used for forging steel, aluminum and brass. In a direct-driven electrical screw press, a reversible electric motor is mounted directly on the screw and on the press frame above the flywheel. With directly driven screw presses, the blow energy can be exactly dosed from one blow to the next. However, so far no prior work is known which uses the blow energy as a control input in a targeted manner to influence the properties of the forging. The purpose of the present work is to lay the foundations for property control through blow energy dosing during forging on screw presses. Process control becomes increasingly interesting due to ever increasing customer demands and needs for resource-efficient production. A major challenge is the variation of process parameters, e.g. temperature variations in the furnace, during transport or due to inherent uncertainty in the heat transfer to the dies and the environment. If the process conditions are changing the deviations from the planned process trajectory may lead to an insufficient die filling or undesired final properties. Forged parts require high precision considering the part geometry and material properties. During forming two mechanisms in terms of forming temperature take place: heat conduction due to contact with tools and heat dissipation due to plastic deformation. The heat transfer acts as disturbance, the impact energy can be used as control input. In this work, investigations into process control by impact energy dosing are put forward using FE (finite element) simulations.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"19 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":"126942742","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

A parallel mixed–hybrid finite element method for two phase flow problems in porous media using MPI 多孔介质中两相流问题的并行混合-混合有限元方法

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2017.2.0593

Jakub Solovský , R. Fučík

引用次数: 3

Applicability and performance analysis of the phase-field modelling based on the Cahn-Hilliard method for the binary alloys 基于Cahn-Hilliard方法的二元合金相场建模适用性及性能分析

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2016.1.0558

K. Dudek, D. Szeliga

{"title":"Applicability and performance analysis of the phase-field modelling based on the Cahn-Hilliard method for the binary alloys","authors":"K. Dudek, D. Szeliga","doi":"10.7494/cmms.2016.1.0558","DOIUrl":"https://doi.org/10.7494/cmms.2016.1.0558","url":null,"abstract":"The Cahn-Hilliard method descries the driving force of the process of phase separation. Considering a binary (two-phase) alloy of conserved composition variable, the C-H model makes it possible to trace the process at which the domain creates pure subdomains of each component. Gururajan et al. have offered a simplified reference implementation of the aforementioned model, using the C language and FFTW libraries. It allows to perform a reverse Fourier transform to acquire a domain composition profile at a given time. Being a proof-of-concept, this approach does not stress on performance and the dedicated tools, like OpenPhase might not provide the flexibility necessary for new implementations. The following work aims on analyzing the C-H algorithm with regards of optimization, taking the Gururajan, among others, as a reference problem. Utilizing the models accompanied by replicable results facilitates the analysis of FFTW and GSL libraries, answering whether to search the replacement implementations and where (if necessary) work on code performance and parallelization. Finally, the improved model is intended to be used on external (non-random) initial composition, taken from ongoing simulations, in hope of preparation of the pearlitic steel model in the future.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"24 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":"130580703","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

An evaluation of the mechanical properties of 13MnSiCr7 steel by digital image correlation 13MnSiCr7钢力学性能的数字图像相关评价

Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2021.2.0754

Marcin Kempny, R. Rozmus

{"title":"An evaluation of the mechanical properties of 13MnSiCr7 steel by digital image correlation","authors":"Marcin Kempny, R. Rozmus","doi":"10.7494/cmms.2021.2.0754","DOIUrl":"https://doi.org/10.7494/cmms.2021.2.0754","url":null,"abstract":"In this paper, the possibility of replacing tensile extensometers with a non-contacting device for measuring elongation has been analyzed. An example of a non-contacting device is a Digital Image Correlation System (DIC). Such systems are widely used in various areas, for example, biology or modern engineering. DIC systems have several advantages that seem to be promising for testing modern materials. The most important is the fact that there is no physical contact between the sample and the DIC and therefore no additional force is applied during the experiment. On the other hand, a lack of contact with the sample can cause large measurement inaccuracies. Another advantage would be that a DIC can measure strain on the whole surface of the sample in all directions, instead of measuring part of the surface in one direction like in other extensometers. Because of these abilities, the environment impact on test bench (DIC + load device), and differences between conducted experiment with normalized tensile test needed to be investigated. The testing machine was replaced by a DIC system cooperating with a tension-compres-sion module. The proposed method was used to monitor and record the images to determine the basic properties of 13MnSiCr7 grade steel. Twelve tests were performed. The analysis was done by comparing the values of mechanical properties obtained in a static tensile test, such as yield strength, tensile strength, Young’s modulus, elongation of the material; with the values of these properties determined experimentally. For each sample, stress-strain curves were evaluated. To check if the results were correct, a Q-Dixon test was performed in each case, confidence intervals were also calculated. Finally, the obtained properties were compared with those from the standard tensile test acquired from the manufacturer’s material card.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"9 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":"131766135","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