VIII Conference on Mechanical Response of Composites最新文献_第7页

Simulation Supported Development of Lightweight Panels with High Delamination Resistance 模拟支持高抗分层轻量化板的开发

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.017

M. Pham, M. Vorhof, T. Gereke, G. Hoffmann, C. Cherif

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Non-Periodicity Challenges in Modelling and Experimental Testing of 3D Woven Composites 三维编织复合材料建模和实验测试中的非周期性挑战

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.071

B. El Said, S. Hallett

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On the Numerical Modeling and Validation of Fracture Mechanics for Printed Electronics Composites. 印刷电子复合材料断裂力学的数值模拟与验证。

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.002

M. Linke, T. Genco, R. Lammering

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Predicting the Elasto-Plastic Response of Short Fiber Composites Using Deep Neural Networks Trained on Micro-Mechanical Simulations 基于微力学模拟训练的深度神经网络预测短纤维复合材料弹塑性响应

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.086

J. Friemann, B. Dashtbozorg, M. Fagerström, M. Mirkhalaf

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It‘s on a Roll: Draping Courses of Glass Fiber Fabric in a Wind Turbine Blade Mold by Means of Optimization 它在滚动:利用优化的方法对风力涡轮机叶片模具中玻璃纤维织物的悬垂过程进行研究

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.053

M. Fagerström, G.Catalanotti, C. Krogh, Jørgen A. Kepler, Johnny Jakobsen

{"title":"It‘s on a Roll: Draping Courses of Glass Fiber Fabric in a Wind Turbine Blade Mold by Means of Optimization","authors":"M. Fagerström, G.Catalanotti, C. Krogh, Jørgen A. Kepler, Johnny Jakobsen","doi":"10.23967/composites.2021.053","DOIUrl":"https://doi.org/10.23967/composites.2021.053","url":null,"abstract":"Wind turbine blades are manufactured from light and strong composite materials. The fiber material, predominantly glass fiber non-crimp fabric (NCF), is rolled out in the blade mold in courses and subsequently infused with the resin. The blade designers will typically specify e.g. the fiber orientations and thicknesses in various regions of the blade. These instructions must be translated into what courses to be placed where in the mold while at the same time paying attention to draping effects, i.e. shearing arising from double mold curvatures. Draping on a double-curved mold can be analyzed with a kinematic draping algorithm [1], e.g. commercially available with programs such as Composites Modeler for Abaqus/CAE, Ansys ACP and Fibersim. Although simple and kinematic, the draping model can predict the draped pattern with reasonable accuracy with a low computational effort. To this end, the applicability of optimization techniques is attractive, see e.g. ref. [2] in which a Genetic Algorithm (GA) is employed. Figure 1 shows the first results of the present study on course optimization, obtained by draping a single course along the right edge of a blade section and letting a GA determine the optimal starting point, i.e. a point of zero shear, to minimize the aggregated shear angles. As it can be seen, the maximum shear angle can be decreased from 10.8 ˚ to 2.7˚ if the starting point is moved from the lower right corner to a position in the center of the course.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","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":"129018575","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}

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On a Reduced Order Fe-Model to Simulate Nonlinear Material Response in Large Composite Structures 大型复合材料结构非线性响应的降阶fe模型

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.108

M. Fagerström, G.Catalanotti, Oliver Dorn, Christian Rolffs, Sven Scheffler, Raimund Rolfes

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Longitudinal Debonding in Unidirectional Composites: A Numerical Study of the Effect of Interfacial Properties 单向复合材料纵向脱粘:界面特性影响的数值研究

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.095

S. AhmadvashAghbash, C. Breite, M. Mehdikhani, Y. Swolfs

{"title":"Longitudinal Debonding in Unidirectional Composites: A Numerical Study of the Effect of Interfacial Properties","authors":"S. AhmadvashAghbash, C. Breite, M. Mehdikhani, Y. Swolfs","doi":"10.23967/composites.2021.095","DOIUrl":"https://doi.org/10.23967/composites.2021.095","url":null,"abstract":"Fibre-matrix longitudinal debonding, governed by the interfacial shear strength and fracture toughness, alters the stress transfer mechanism in the composite by changing the stress field around the broken fiber [1]. In a majority of the fibre-matrix debonding finite element models in the literature, as in [2], the debonded length has been imposed based on the experimentally measured lengths. The simplified models typically treat the matrix as a linear elastic material and/or exclude the effects of interfacial friction and thermal residual stresses on the stress behavior of the constituents. The current work develops high-fidelity debonding models, which include the main relevant phenomena occurring in reality to perform a numerical parametric study of the interfacial properties in carbon fibre/epoxy systems in single-fiber (Figure 1a) and multi-fibre composites (Figure 1b-c). Numerical results show that the thermal residual stresses constrain the debond propagation and the interfacial friction has a significant influence on how the axial load in the broken fibre recovers (Figure 1d). Figure 1e shows the effect of fracture toughness on the stress profile for the broken fibre in the single-fibre model. It is concluded that, within the range of reported interfacial properties, for large friction coefficients (μ > 0.4) or high interfacial fracture toughnesses (GII c > 0.1 N/mm) no debonding will be developed.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"44 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":"131686177","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

Circular Microstructural Volume Elements With Periodic Boundary Conditions for Localization Problems 局部化问题中具有周期边界条件的圆形微结构体积元

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.042

Pieter Hofman, Lu Ke, Frans P. van der Meer

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Multiscale Modeling of Composite Laminates Delamination via Computational Homogenization 基于计算均匀化的复合材料层合板分层多尺度建模

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.040

L. Ke, F. van den Meer

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Partitioned-domain Particle-continuum Coupling Methods for Simulations of Inelastic Amorphous Polymer-Based Nanocomposites 非弹性非晶态聚合物基纳米复合材料的分域粒子连续耦合模拟方法

VIII Conference on Mechanical Response of Composites Pub Date : 1900-01-01 DOI: 10.23967/composites.2021.056

M. Fagerstr¨om, G. Catalanotti, Wuyang Zhao, S. Pfaller

{"title":"Partitioned-domain Particle-continuum Coupling Methods for Simulations of Inelastic Amorphous Polymer-Based Nanocomposites","authors":"M. Fagerstr¨om, G. Catalanotti, Wuyang Zhao, S. Pfaller","doi":"10.23967/composites.2021.056","DOIUrl":"https://doi.org/10.23967/composites.2021.056","url":null,"abstract":"Partitioned-domain particle-continuum coupling methods can ﬁnd a compromise between accuracy and computational cost by only treating regions of speciﬁc interest at atomistic resolution while considering the remaining region at continuum resolution. Most partitioned-domain methods are designed for crystalline materials and cannot be applied to polymer-based nanocomposites (PNCs) due to their amorphous structures and inelastic mechanical behavior. We present the Capriccio method as a particle-continuum coupling technique for PNCs based on [1], which introduces artiﬁcial anchor points in the bridging domain to communicate between the particle domain and the continuum. The Capriccio method was initially limited to small deformations within the elastic regime and has been recently extended to inelastic deformation by employing a viscoelastic-viscoplastic constitutive model for the continuum [2]. This extended Capriccio method is validated by comparing its averaged stress-strain curves to coarse-grained molecular dynamics simulations of glassy polystyrene under different loading conditions. In this presentation, we further investigate the advantages and limitations of the Capriccio method in multiscale simulations of glassy silica-polystyrene nanocomposites. In addition to averaged mechanical properties, the local stress and deformation in the vicinity of silica particles are also taken into account and compared to pure coarse-grained molecular dynamics simulations.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"8 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":"117023199","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