VIII Conference on Mechanical Response of Composites最新文献

On the use of artificial neural networks and micromechanical analysis for prediciting elastic properties of unidirectional composites 应用人工神经网络和微力学分析预测单向复合材料弹性性能

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-09 DOI: 10.23967/composites.2021.125

E. Ghane, M. Fagerström, M. Mirkhalaf

{"title":"On the use of artificial neural networks and micromechanical analysis for prediciting elastic properties of unidirectional composites","authors":"E. Ghane, M. Fagerström, M. Mirkhalaf","doi":"10.23967/composites.2021.125","DOIUrl":"https://doi.org/10.23967/composites.2021.125","url":null,"abstract":"The composite design industry has a central demand to predict the elastic behavior of composites from their constituent properties and micromechanical information. In this case, the complex architecture of interlaced yarns in woven composites brings about challenges to accurately predict their mechanical behavior. Multiscale computational methods, often based on computational homogenization, have therefore been established to address the complexity in modeling woven composites. But for computational homogenization of woven composites, one needs to consider the microscale mechanical properties at every point inside a mesoscale unit cell. Based on the possible range of microstructural features, a plethora of research exists to generate random distributions of fibers in a microscopic representative volume element (RVE) and predict elastic properties using numerical methods, such as the finite element method [1,2]. But there is still a requirement to observe the whole possible microstructural design space based on any possible loading case and architecture in order to reach a generic model. Recently,","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114766476","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

Multi-Scale Modelling of Heterogenous Textile Composite Structures over Polytopal Tessellated Domains 多面体镶嵌域上异质纺织复合材料结构的多尺度建模

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.033

I. Topalidis, B. E. Said, A. Thompson, S. Hallett

{"title":"Multi-Scale Modelling of Heterogenous Textile Composite Structures over Polytopal Tessellated Domains","authors":"I. Topalidis, B. E. Said, A. Thompson, S. Hallett","doi":"10.23967/composites.2021.033","DOIUrl":"https://doi.org/10.23967/composites.2021.033","url":null,"abstract":"The multi-scale nature of woven composites can be clearly revealed by the strong dependency of the mechanical behaviour on morphological features of lower length scales. Geometrical irregularities in the yarn architecture, induced during the manufacturing stages, alter the mesoscopic material stress field, often dominating the overall material response. To adequately describe major internal geometrical features, common discretisation techniques require to dramatically increase the dimensionality of the problem leading to prohibitive computational demands. On the other hand, the applicability of multi-scale homogenisation techniques, developed to satisfy the need for model order reduction can be limited, due to the large unit cell size of certain weave styles and the loss of periodicity due to local material deformations. To address this, a computationally efficient macroscale modelling approach is proposed, employing a three-dimensional tessellation scheme to obtain a reduced order model that preserves important information about the internal material weave architecture and features. As an initial step, a kinematic, multi-chain beam model is used to acquire a realistic “as - woven” material internal yarn geometry, from which a surface model of the yarn segments is extracted. The yarn section surfaces feed a spatial tessellation algorithm to generate a set of collectively exhaustive and mutually exclusive polyhedral cells. To exploit the reduced complexity of the tessellated geometry, a mesh of n-faced polyhedral elements [1] is assembled to perform the numerical solution of the problem domain. The material model follows a multi-scale, bi-material homogenisation approach based on the local meso-structure and the mechanical properties of the two constituents; the fibre and the matrix. Inaccuracies in predicted results from conventional homogenisation techniques typically arise","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123586837","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 Deformation Phase-Field Fracture Model for Nanoparticle/Polymer Composites 纳米颗粒/聚合物复合材料的有限变形相场断裂模型

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.038

B. Arash, R. Rolfes

{"title":"A Finite Deformation Phase-Field Fracture Model for Nanoparticle/Polymer Composites","authors":"B. Arash, R. Rolfes","doi":"10.23967/composites.2021.038","DOIUrl":"https://doi.org/10.23967/composites.2021.038","url":null,"abstract":"The computational modeling of fracture in the nanocomposites requires an accurate prediction of crack initiation and propagation in the materials. For this, generalizing Griffith’s theory, phase-field fracture models (PFMs) provide variational fracture models by minimizing potential energy that consists of stored bulk energy, the work of external forces, and the surface energy [1, 2]. This work presents the development of a finite deformation PFM to analyze the viscoelastic behavior of boehmite nanoparticle/epoxy nanocomposites. To characterize the rate-dependent fracture evolution, the free energy is additively decomposed into an equilibrium, a non-equilibrium, and a volumetric part with a varying definition under tensile and compressive deformation. Furthermore, the Guth–Gold and modified Kitagawa models are adopted to consider the effect of the nanoparticle contents and temperature on the nanocomposites’ fracture behavior. The applicability of the proposed model is evaluated by comparing the numerical results of compact-tension tests with experimental data. The experimental–numerical validation justifies the predictive capability of the model. Numerical simulations are also performed to study the effect of temperature and loading rate on the force-displacement response of boehmite nanoparticle/epoxy samples in the compacttension tests.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129753266","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

On the Optimization of Carbon Nanotube-Enriched Multifunctional Composites: Mechanical and Electrical Approach 富碳纳米管多功能复合材料的优化:机械和电气方法

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.041

T. Genco, M. Linke, R. Lammering

引用次数: 0

Simulation of The Wrinkling of Thin Hyperelastic Composite Strips under Global Tensile Loading 超弹性复合材料薄板在全局拉伸载荷下的起皱模拟

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.079

M. Schasching, R. Duy, T. Ceglar, M. Todt, H. Pettermann

引用次数: 0

Estimation of Sensitive Material Properties of an Open Hole Tension Test of Composite Laminates 复合材料层合板开孔拉伸试验敏感材料性能的估计

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.098

A. Sasikumar, I. Cózar, O. Vallmajó, S. Abdel-Monsef, M. Delozzo, A. Turón

引用次数: 0

Methodical Development of a Structural Health Monitoring System for COPV Supported by a Digital Shadow. 基于数字阴影的COPV结构健康监测系统的系统开发。

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.061

R. Richstein, T. Reichartz, A. Janetzko-Preisler, K. Schroeder

引用次数: 1

Local Fibre Orientation and Fibre Volume Fraction Mapped Numerical Models Based on X-ray Computer Tomography Scans 基于x射线计算机断层扫描的局部纤维取向和纤维体积分数映射数值模型

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.029

R. Auenhammer, Lars Pilgaard Mikkelsen, C. Oddy, R. Larsson, L. Asp

引用次数: 0

PolyHydroxyAlkanoates/ Alfa Fibers Bio-Composites: Elaboration and Mechanical Testing 聚羟基烷酸酯/阿尔法纤维生物复合材料:加工和力学测试

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.113

I. Zaafouri, M. Zrida, H. Laurent, A. Hamzaoui

引用次数: 0

Homogenization of Fiber Reinforced Elastomer Laminates 纤维增强弹性体层压板的均匀化

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.031

T. Ceglar, H. Pettermann

引用次数: 0