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A repeatability study of artificial neural network predictions in flow stress model development for a magnesium alloy 人工神经网络预测镁合金流变应力模型的可重复性研究
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2021.4.0769
Hubert Siewior, L. Madej
{"title":"A repeatability study of artificial neural network predictions in flow stress model development for a magnesium alloy","authors":"Hubert Siewior, L. Madej","doi":"10.7494/cmms.2021.4.0769","DOIUrl":"https://doi.org/10.7494/cmms.2021.4.0769","url":null,"abstract":"This work is devoted to an evaluation of the capabilities of artificial neural networks (ANN) in terms of developing a flow stress model for magnesium ZE20. The learning procedure is based on experimental flow-stress data following inverse analy - sis. Two types of artificial neural networks are investigated: a simple feedforward version and a recursive one. Issues related to the quality of input data and the size of the training dataset are presented and discussed. The work confirms the general ability of feedforward neural networks in flow stress data predictions. It also highlights that slightly better quality predictions are obtained using recursive neural networks.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","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":"133352945","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
Projection-based interpolation algorithm over two-dimensional grids with triangular elements 基于投影的二维三角形网格插值算法
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2019.1.0629
Jakub Ryzner, A. Paszyńska
{"title":"Projection-based interpolation algorithm over two-dimensional grids with triangular elements","authors":"Jakub Ryzner, A. Paszyńska","doi":"10.7494/cmms.2019.1.0629","DOIUrl":"https://doi.org/10.7494/cmms.2019.1.0629","url":null,"abstract":"","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"376 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":"133373331","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 use of computer image analysis in determining material flow in the roller press compacting unit during compacting of fine-grained material 利用计算机图像分析技术确定细粒物料压实过程中辊压机压实装置内的物料流动
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2018.2.0614
M. Bembenek
{"title":"The use of computer image analysis in determining material flow in the roller press compacting unit during compacting of fine-grained material","authors":"M. Bembenek","doi":"10.7494/cmms.2018.2.0614","DOIUrl":"https://doi.org/10.7494/cmms.2018.2.0614","url":null,"abstract":"Mechanisms of fine-grained material flow in a roller press are a constant subject of research. The proper transfer of feed in the feeder has a significant influence on the correct course of the compaction and consolidation process, product quality, and the intensity of wear of the forming components. A few mathematical models of compaction process have been put forth, but they are focused mainly on loads in the compacting unit and consolidated material properties. During compaction the loose material properties including the Young module, the external and internal friction coefficient, and the side pressure coefficient change continuously. Therefore visualisation tests were carried out to survey the flow of material in a compaction unit equipped with rollers with a flat working surface and gravity feeder. Using the NI Vision Builder program, the recorded video observations were analyzed and the medium speed distribution of the material in the feeder was determined. The results were presented in the form of graphs and compared with one another, specifying the relationship between the material speed distribution and the press operation parameters.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"148 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":"131473023","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
Framework for fast simulations of material science phenomena with Cahn-Hilliard equations 用Cahn-Hilliard方程快速模拟材料科学现象的框架
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2019.1.0626
Grzegorz Gurgul, M. Paszyński, D. Szeliga, V. Puzyrev
{"title":"Framework for fast simulations of material science phenomena with Cahn-Hilliard equations","authors":"Grzegorz Gurgul, M. Paszyński, D. Szeliga, V. Puzyrev","doi":"10.7494/cmms.2019.1.0626","DOIUrl":"https://doi.org/10.7494/cmms.2019.1.0626","url":null,"abstract":"","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"34 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":"131504778","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
Development and verification of the scale formation model during high temperature oxidation for S235 steel S235钢高温氧化过程中水垢形成模型的建立与验证
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/CMMS.2020.4.0723
Aleksandra Przyłucka, A. Cebo-Rudnicka, M. Rywotycki, J. Augustyn-Nadzieja, Z. Malinowski
{"title":"Development and verification of the scale formation model during high temperature oxidation for S235 steel","authors":"Aleksandra Przyłucka, A. Cebo-Rudnicka, M. Rywotycki, J. Augustyn-Nadzieja, Z. Malinowski","doi":"10.7494/CMMS.2020.4.0723","DOIUrl":"https://doi.org/10.7494/CMMS.2020.4.0723","url":null,"abstract":"Every year rapid industrialization and the following urbanization fuel the global demand for steel. The use of steel products contributes to the sustainable development of society. The scale growth mechanism accompanies the high-temperature plastic working of metals and alloys. The article focuses on the thickness of the scale formed as a result of annealing steel samples in a furnace. Samples made of S235 (A283C) steel were heated at two temperatures, 1100°C and 1200°C, for 8 minutes. The amount of scale formed was determined on the basis of photos taken with a light microscope. The transformed equations of steel oxidation kinetics were used in the computational part. The scale thickness obtained numerically corresponded to the scale formed in real conditions. The aim of the research was to adjust the scale growth model on steel so that it gives correct results in relation to the actual thickness of the formed oxidized layer.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"5 10 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":"114408606","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
Quantum-inspired evolutionary optimization of SLMoS2 two-phase structures SLMoS2两相结构的量子启发进化优化
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2022.2.0777
Wac�aw Ku�, A. Mrózek
{"title":"Quantum-inspired evolutionary optimization of SLMoS2 two-phase structures","authors":"Wac�aw Ku�, A. Mrózek","doi":"10.7494/cmms.2022.2.0777","DOIUrl":"https://doi.org/10.7494/cmms.2022.2.0777","url":null,"abstract":"The paper focuses on applying a Quantum Inspired Evolutionary Algorithm to achieve the optimization of 2D material containing two phases, 2H and 1T, of Molybdenum Disulphide (MoS 2 ). The goal of the optimization is to obtain a nanostructure with tailored mechanical properties. The design variables describe the shape of inclusion made from phase 1T in the 2H unit cell. The modification of the size of the inclusions leads to changes in the mechanical properties. The problem is solved with the use of computed mechanical properties on the basis of the Molecular Statics approach with ReaxFF potentials.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"76 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":"122736576","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
A finite-strain model for a superelastic NiTi shape memory alloy 超弹性NiTi形状记忆合金的有限应变模型
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2022.1.0770
Dongjie Jiang, Yao Xiao
{"title":"A finite-strain model for a superelastic NiTi shape memory alloy","authors":"Dongjie Jiang, Yao Xiao","doi":"10.7494/cmms.2022.1.0770","DOIUrl":"https://doi.org/10.7494/cmms.2022.1.0770","url":null,"abstract":"A finite-strain constitutive model of a superelastic NiTi shape memory alloy is proposed in this paper. Via backward Euler implicit integration scheme and the incorporation of material softening, the model is implemented into finite element code to reproduce a Lüders like deformation of a superelastic NiTi. The simulation results are in agreement with the experimental results, indicating that the constitutive model can reasonably predict the mechanical behavior of a superelastic NiTi. A parametric study further verifies that the magnitude of softening modulus has a significant effect on the stress-strain response and Lüders-like deformation of a superelastic NiTi.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"90 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":"115183415","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 highest entropy production during diffusion 扩散过程中产生的最大熵
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2018.1.0609
D. Serafin, B. Wierzba
{"title":"The highest entropy production during diffusion","authors":"D. Serafin, B. Wierzba","doi":"10.7494/cmms.2018.1.0609","DOIUrl":"https://doi.org/10.7494/cmms.2018.1.0609","url":null,"abstract":"In the present paper, the theory of the highest entropy production is discussed. It allows to predict, which phases will grow during the multiphase ternary interdiffusion process. Moreover, the phase with the highest entropy production value will nucleate as first in the reaction zone. To verify the theory the mathematical formula for calculating the entropy production was formulated. The formula bases on the generalized Darken method. Two diffusion couples: pure titanium with high purity copper-nickel alloys with different initial composition: Ni10Cu90-Ti and Ni90Cu10-Ti (at at. %) were annealed to obtain the thermodynamic and kinetic data. The integral diffusion coefficients for each component in each phase were determined using Wagner method. The reaction zones in ternary system have been analyzed: the microstructure was observed and chemical compositions were measured. Based on obtained results the entropy production was calculated. The results show that the theory of the highest entropy production can be applied in determining a proper diffusion path in multicomponent, multiphase system.�","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"294 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":"126962915","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 effect of model size and boundary conditions on the representativeness of digital material representation simulations of ferritic-pearlitic sample compression 模型尺寸和边界条件对铁素体-珠光体压缩数字材料表征模拟代表性的影响
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2022.2.0780
Konrad Perzy�ski
{"title":"The effect of model size and boundary conditions on the representativeness of digital material representation simulations of ferritic-pearlitic sample compression","authors":"Konrad Perzy�ski","doi":"10.7494/cmms.2022.2.0780","DOIUrl":"https://doi.org/10.7494/cmms.2022.2.0780","url":null,"abstract":"The main objective of this work is to investigate the representativeness of the digital material representation (DMR) models of ferritic-pearlitic steel generated by the hybrid cellular automata (CA) / Monte Carlo (MC) algorithm. Particular attention is focused on determining the effect of the size of the digital representation model on its representativeness under deformation conditions simulated with the finite element (FE) framework. In addition, the effect of periodic and non-periodic boundary conditions on the deformation behaviour of DMR models is analysed. A dedicated buffer zone approach applied the periodic boundary conditions on non-periodic finite element models. The results of equivalent stresses and strains and their average values are used to evaluate the differences between the models’ predictions","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","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":"130206467","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
Numerical analysis of damage during hot forming 热成形损伤的数值分析
Computer Methods in Material Science Pub Date : 1900-01-01 DOI: 10.7494/cmms.2018.3.0619
J. Szyndler, M. Imran, M. J. Afzal, M. Bambach
{"title":"Numerical analysis of damage during hot forming","authors":"J. Szyndler, M. Imran, M. J. Afzal, M. Bambach","doi":"10.7494/cmms.2018.3.0619","DOIUrl":"https://doi.org/10.7494/cmms.2018.3.0619","url":null,"abstract":"The main aim of the presented research is the analysis of damage evolution in 16MnCrS5 steelduring hot formingbased on results obtained from finite element modelling. Particular attention is put on the interaction between dynamic recrystallization (DRX) and damage initiation at the matrix-inclusion interface. Moreover, a modified Gurson-Tvergaard-Needleman (GTN) model is proposed with the nucleation criterion taken from an extended Horstemeyer model, which predicts damage nucleation based on material softening due to the DRX and stress state in the material.","PeriodicalId":401877,"journal":{"name":"Computer Methods in Material Science","volume":"32 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":"121699923","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
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