Journal of Multiscale Modelling最新文献_第4页

Inter-Element Crack Propagation with High-Order Stress Equilibrium Element 采用高阶应力平衡单元的单元间裂纹扩展

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-12-28 DOI: 10.1142/s1756973721440029

F. Parrinello, I. Benedetti

引用次数: 0

Residual Stress Around the Fatigue Crack front in a Rectangular Sample cut from CT Specimen 从CT试样上切割的矩形试样疲劳裂纹前缘周围的残余应力

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-12-20 DOI: 10.1142/s1756973721440030

A. Materna, H. Lauschmann, J. Ondracek

引用次数: 0

Coupling BEM and VEM for the Analysis of Composite Materials with Damage 复合材料损伤分析的边界元法与向量法耦合

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-12-14 DOI: 10.1142/s1756973721440017

M. Lo Cascio, I. Benedetti

{"title":"Coupling BEM and VEM for the Analysis of Composite Materials with Damage","authors":"M. Lo Cascio, I. Benedetti","doi":"10.1142/s1756973721440017","DOIUrl":"https://doi.org/10.1142/s1756973721440017","url":null,"abstract":"Numerical tools which are able to predict and explain the initiation and propagation of damage at the microscopic level in heterogeneous materials are of high interest for the analysis and design of modern materials. In this contribution, we report the application of a recently developed numerical scheme based on the coupling between the Virtual Element Method (VEM) and the Boundary Element Method (BEM) within the framework of continuum damage mechanics (CDM) to analyze the progressive loss of material integrity in heterogeneous materials with complex microstructures. VEM is a novel numerical technique that, allowing the use of general polygonal mesh elements, assures conspicuous simplification in the data preparation stage of the analysis, notably for computational micro-mechanics problems, whose analysis domain often features elaborate geometries. BEM is a widely adopted and efficient numerical technique that, due to its underlying formulation, allows reducing the problem dimensionality, resulting in substantial simplification of the pre-processing stage and in the decrease of the computational effort without affecting the solution accuracy. The implemented technique has been applied to an artificial microstructure, consisting of the transverse section of a circular shaped stiff inclusion embedded in a softer matrix. BEM is used to model the inclusion that is supposed to behave within the linear elastic range, while VEM is used to model the surrounding matrix material, developing more complex nonlinear behaviors. Numerical results are reported and discussed to validate the proposed method.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45785861","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

Cyclic Loading on Damaged AA7075-T6 Specimens: Numerical Modelling and Experimental Testing 损伤AA7075-T6试件的循环加载:数值模拟与试验测试

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-12-13 DOI: 10.1142/s1756973721440054

E. V. Arcieri, S. Baragetti

引用次数: 1

Crack Deflection Under Mixed-Mode Loading Conditions in Fine-Grained Composites Based on Water Glass-Activated Slag 水玻璃活性渣基细晶复合材料混合加载条件下裂纹挠度研究

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-12-13 DOI: 10.1142/s1756973721440042

L. Malíková, H. Šimonová, B. Kucharczyková

引用次数: 0

An Integrated Multiscale Simulation Routine to Predict Mechanical Performance from Manufacturing Effects 从制造效应预测机械性能的集成多尺度仿真程序

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-10-29 DOI: 10.1142/s1756973721430010

M. Rouhi, V. Tan, T. Tay

{"title":"An Integrated Multiscale Simulation Routine to Predict Mechanical Performance from Manufacturing Effects","authors":"M. Rouhi, V. Tan, T. Tay","doi":"10.1142/s1756973721430010","DOIUrl":"https://doi.org/10.1142/s1756973721430010","url":null,"abstract":"Structural performance of unidirectional composites (UD) is directly dependent on its ingredient’s properties, ply configurations and the manufacturing effects. Prediction of mechanical properties using multiscale manufacturing simulation and micromechanical models is the focus of this study. Particular problem of coupled dual-scale deformation-flow process such as the one arising in RTM, Vacuum-Assisted Resin Infusion (VARI) and Vacuum Bag Only (VBO) prepregs is considered. A finite element formulation of porous media theory framework is employed to predict the element-wise local volume fractions and the deformation of a preform in a press forming process. This formulation considers coupling effects between macro-scale preform processes and mesoscale ply processes as well as coupling effects between the solid and fluid phases. A number of different micromechanical models are assessed and the most suitable one is used to calculate mechanical properties from volume fractions. Structural performance of the “deformed” geometry is then evaluated in mechanical analysis. An integrated platform is designed to cover the whole chain of analysis and perform the properties’ calculation and transfer them between the modules in a smooth mapping procedure. The paper is concluded with a numerical example, where a compression-relaxation test of a planar fluid filled prepreg at globally un-drained condition is considered followed by a mechanical loading analysis. The development is user friendly and interactive and is established to enable design and optimization of composites.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43692166","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

Investigation of Rotating Eddy Current Testing Simulation Using Simplified Model 基于简化模型的旋转涡流检测仿真研究

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-10-29 DOI: 10.1142/s1756973721420026

Chenkai Yang, Jiuhao Ge, Baowang Hu

引用次数: 2

Micromechanical Modeling of Unidirectional CFRP Composites with Proportional Stressing 单向比例应力CFRP复合材料细观力学建模

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-10-25 DOI: 10.1142/s1756973721430022

Zhoucheng Su, Dan Wang, T. Guo, N. Sridhar

引用次数: 0

Multi-Timescale Simulations of Temperature Elevation for Ultrasonic Welding of CFRP with Energy Director 带能量导向器的CFRP超声波焊接温度场的多时间尺度模拟

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-10-25 DOI: 10.1142/s1756973721430034

Maruri Takamura, Kotaro Uehara, J. Koyanagi, Shinichi Takeda

{"title":"Multi-Timescale Simulations of Temperature Elevation for Ultrasonic Welding of CFRP with Energy Director","authors":"Maruri Takamura, Kotaro Uehara, J. Koyanagi, Shinichi Takeda","doi":"10.1142/s1756973721430034","DOIUrl":"https://doi.org/10.1142/s1756973721430034","url":null,"abstract":"Ultrasonic welding is an energy-efficient technology that enables quick bonding of thermoplastic composite materials under normal temperature and pressure conditions. Here, numerical multi-timescale simulation is proposed to understand the welding principle, using numerical simulations of ultrasonic welding. The simulation results are validated by comparing with temperature measurements in welding tests. In the multi-timescale simulations, microsecond-scale simulations are performed first. The ultrasonic wave is modeled as a vibration load, and the energy dissipation per vibration at 25, 75, 125, 175, 225, and 275∘C is analyzed. Then, the time derivative of the temperature rise is obtained. In the normal scale simulations, the ultrasonic wave and holding pressure are replaced by a constant load, and the entire process of ultrasonic welding is simulated. The slope of the temperature rise is fitted to the time derivative of the temperature rise obtained from the microsecond-scale simulations, using the material constant as a parameter. Explicit multi-timescale simulations were performed to investigate the relationship between stress concentration and temperature rise due to ED geometry. The result reveals similar temperature behavior to the experimental one, indicating the validity of the multi-timescale method. It suggests that viscoelastic energy dissipation and stress concentration are responsible for the temperature spike.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46043481","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: 4

Investigation on Thrust and Torque Generation During Drilling of Hybrid Laminates Composite with Different Stacking Sequences Using Multiobjective Optimization Module 用多目标优化模块研究不同堆叠顺序的复合材料钻孔过程中产生的推力和扭矩

IF 1.5

Journal of Multiscale Modelling Pub Date : 2021-10-09 DOI: 10.1142/s1756973721500098

A. Dubey, J. Kumar, S. Kesarwani, R. Verma

{"title":"Investigation on Thrust and Torque Generation During Drilling of Hybrid Laminates Composite with Different Stacking Sequences Using Multiobjective Optimization Module","authors":"A. Dubey, J. Kumar, S. Kesarwani, R. Verma","doi":"10.1142/s1756973721500098","DOIUrl":"https://doi.org/10.1142/s1756973721500098","url":null,"abstract":"This paper highlights the reinforcement of two different fibers in the manufacturing of hybrid laminate composites. The feasibility of glass and carbon fiber-based hybrid composites is proposed for various high performances due to their versatile mechanical properties. However, anisotropic and non-homogeneity nature creates several machining challenges for manufacturers. It can be regulated through the selection of proper cutting conditions during the machining test. The effect of process constraints like spindle speed (rpm), feed rate (mm/min), and stacking sequences ([Formula: see text] was evaluated for the optimum value of thrust force and Torque during the drilling test. The cost-effective method of hand layup has been used to fabricate the composites. Four different hybrid composites were developed using different layers of carbon fiber and glass fiber layers. The outcomes of variables on machining performances were analyzed by variation of feed rate and speed to acquire the precise holes in the different configurations. The application potential of the proposed composites is evaluated through the machining (drilling) efficiency. The optimal condition for the drilling procedure was investigated using the multiobjective optimization-Grey relation analysis (MOO-GRA) approach. The findings of the confirmatory test show the feasibility of the MOO-GRA module in a machining environment for online and offline quality control.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48728030","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