Pub Date : 1900-01-01DOI: 10.23967/composites.2021.017
M. Pham, M. Vorhof, T. Gereke, G. Hoffmann, C. Cherif
A new type of panels is developed that is based on spacer woven fabrics. A stable composite tape made of glass fiber rovings and a thermoplastic matrix is used as input material. These composite tapes are first formed with a pair of gears at elevated temperature to give them a three dimensional shape for weft insertion. The geometries of the gears depend on the configuration of the final panels. Secondly, the composite tapes prepared in this way are further processed on the weaving machine and spacer fabrics are fabricated. Finally, the spacer fabric is consolidated with a thermoset or thermoplastic matrix to form the final panel. A meso-scale finite element model based on shell elements is developed and used for the simulation of the panel manufacturing process and the structural behavior of the panels.
{"title":"Simulation Supported Development of Lightweight Panels with High Delamination Resistance","authors":"M. Pham, M. Vorhof, T. Gereke, G. Hoffmann, C. Cherif","doi":"10.23967/composites.2021.017","DOIUrl":"https://doi.org/10.23967/composites.2021.017","url":null,"abstract":"A new type of panels is developed that is based on spacer woven fabrics. A stable composite tape made of glass fiber rovings and a thermoplastic matrix is used as input material. These composite tapes are first formed with a pair of gears at elevated temperature to give them a three dimensional shape for weft insertion. The geometries of the gears depend on the configuration of the final panels. Secondly, the composite tapes prepared in this way are further processed on the weaving machine and spacer fabrics are fabricated. Finally, the spacer fabric is consolidated with a thermoset or thermoplastic matrix to form the final panel. A meso-scale finite element model based on shell elements is developed and used for the simulation of the panel manufacturing process and the structural behavior of the panels.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"17 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120992264","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.071
B. El Said, S. Hallett
{"title":"Non-Periodicity Challenges in Modelling and Experimental Testing of 3D Woven Composites","authors":"B. El Said, S. Hallett","doi":"10.23967/composites.2021.071","DOIUrl":"https://doi.org/10.23967/composites.2021.071","url":null,"abstract":"","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"47 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":"127087745","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.002
M. Linke, T. Genco, R. Lammering
During the service life of all kinds of structures (e.g. aircrafts, wind turbines) the structural integrity is a key factor for safe performance. Due to the increasing use of fibre reinforced polymers (FRP) in various structures, there is a growing need for timely detection of non-visible damage. Since common scheduled maintenance is ineffective in terms of time and cost, the investigation of possibly viable structural health monitoring (SHM) concepts is a main research focus [1]. Integration of electrical sensors into these structures allows diagnosis about the existence and extent of damage by measuring of in-situ electrical characteristics. Nanojet printed sensors made of carbon nanotube (CNT) enriched composite materials can exhibit considerable electrical and mechanical properties for this task.
{"title":"On the Numerical Modeling and Validation of Fracture Mechanics for Printed Electronics Composites.","authors":"M. Linke, T. Genco, R. Lammering","doi":"10.23967/composites.2021.002","DOIUrl":"https://doi.org/10.23967/composites.2021.002","url":null,"abstract":"During the service life of all kinds of structures (e.g. aircrafts, wind turbines) the structural integrity is a key factor for safe performance. Due to the increasing use of fibre reinforced polymers (FRP) in various structures, there is a growing need for timely detection of non-visible damage. Since common scheduled maintenance is ineffective in terms of time and cost, the investigation of possibly viable structural health monitoring (SHM) concepts is a main research focus [1]. Integration of electrical sensors into these structures allows diagnosis about the existence and extent of damage by measuring of in-situ electrical characteristics. Nanojet printed sensors made of carbon nanotube (CNT) enriched composite materials can exhibit considerable electrical and mechanical properties for this task.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"5 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":"124123860","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.086
J. Friemann, B. Dashtbozorg, M. Fagerström, M. Mirkhalaf
mechanical modeling of Short Fiber Reinforced Composites (SFRC) is of anisotropy, discontinuity and orientation distribution of fibers. to accurately predict the behavior of SFRC with fiber orientations and fiber volume fractions is in the design and produc-tion of injection molded parts. constitutive
{"title":"Predicting the Elasto-Plastic Response of Short Fiber Composites Using Deep Neural Networks Trained on Micro-Mechanical Simulations","authors":"J. Friemann, B. Dashtbozorg, M. Fagerström, M. Mirkhalaf","doi":"10.23967/composites.2021.086","DOIUrl":"https://doi.org/10.23967/composites.2021.086","url":null,"abstract":"mechanical modeling of Short Fiber Reinforced Composites (SFRC) is of anisotropy, discontinuity and orientation distribution of fibers. to accurately predict the behavior of SFRC with fiber orientations and fiber volume fractions is in the design and produc-tion of injection molded parts. constitutive","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"57 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":"121461283","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.053
M. Fagerström, G.Catalanotti, C. Krogh, Jørgen A. Kepler, Johnny Jakobsen
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.
风力涡轮机的叶片由轻质和坚固的复合材料制成。纤维材料，主要是玻璃纤维无卷曲织物(NCF)，在叶片模具中轧制成课程，随后注入树脂。叶片设计者通常会指定叶片不同区域的纤维方向和厚度。这些说明必须翻译成在模具中放置什么课程，同时注意悬垂效果，即由双模具曲率引起的剪切。双曲线模具上的悬垂可以使用运动学悬垂算法进行分析[1]，例如，可通过复合材料建模器(Composites Modeler for Abaqus/CAE)、Ansys ACP和Fibersim等商用程序进行分析。该模型虽然简单且具有运动学特征，但能以较低的计算量以合理的精度预测织物的垂型。为此，优化技术的适用性是有吸引力的，例如参考文献[2]，其中采用了遗传算法(GA)。图1显示了本研究的航向优化的第一个结果，通过沿叶片截面的右边缘悬垂单个航向，并让遗传算法确定最佳起点，即零剪切点，以最小化聚合剪切角。从图中可以看出，如果将起始点从右下角移动到赛道中心位置，最大剪切角可以从10.8˚减小到2.7˚。
{"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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.108
M. Fagerström, G.Catalanotti, Oliver Dorn, Christian Rolffs, Sven Scheffler, Raimund Rolfes
Due to their superior lightweight potential, composites are used in a wide variety of large and slender structures such as gliders, rotor blades of wind turbines or vertical tails of transportation aircrafts. The numerical analysis of these laminated materials typically follows a layer-based approach which describes the stress-strain response of an unidirectional layer within the laminate. Advantages of this method are low experimental characterization costs. The material parameters for an unidirectional layer allow the analysis of arbitrary laminate stackings. In addition, since the position of each layer in the stacking sequence is available, the kinematic behavior of the laminate due to failure of single plies can be predicted accurately in terms of a progressive damage analysis. On the other hand taking material nonlinearities as failure modes, softening, viscoelasticity or plasticity in a
{"title":"On a Reduced Order Fe-Model to Simulate Nonlinear Material Response in Large Composite Structures","authors":"M. Fagerström, G.Catalanotti, Oliver Dorn, Christian Rolffs, Sven Scheffler, Raimund Rolfes","doi":"10.23967/composites.2021.108","DOIUrl":"https://doi.org/10.23967/composites.2021.108","url":null,"abstract":"Due to their superior lightweight potential, composites are used in a wide variety of large and slender structures such as gliders, rotor blades of wind turbines or vertical tails of transportation aircrafts. The numerical analysis of these laminated materials typically follows a layer-based approach which describes the stress-strain response of an unidirectional layer within the laminate. Advantages of this method are low experimental characterization costs. The material parameters for an unidirectional layer allow the analysis of arbitrary laminate stackings. In addition, since the position of each layer in the stacking sequence is available, the kinematic behavior of the laminate due to failure of single plies can be predicted accurately in terms of a progressive damage analysis. On the other hand taking material nonlinearities as failure modes, softening, viscoelasticity or plasticity in a","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"3 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":"131222519","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.095
S. AhmadvashAghbash, C. Breite, M. Mehdikhani, Y. Swolfs
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.
纤维-基体纵向剥离受界面剪切强度和断裂韧性的支配，通过改变断裂纤维周围的应力场改变复合材料中的应力传递机制[1]。在文献中的大多数纤维矩阵脱粘有限元模型中，如[2]，脱粘长度是根据实验测量的长度施加的。简化模型通常将基体视为线弹性材料，并且/或排除了界面摩擦和热残余应力对组分应力行为的影响。目前的工作开发了高保真的脱粘模型，其中包括现实中发生的主要相关现象，以对单纤维(图1a)和多纤维复合材料(图1b-c)中碳纤维/环氧树脂体系的界面特性进行数值参数研究。数值结果表明，热残余应力约束了剥离扩展，界面摩擦对断裂纤维中轴向载荷的恢复有显著影响(图1d)。图1e显示了单纤维模型中断裂韧性对断裂纤维应力分布的影响。结果表明，在所报道的界面性能范围内，大摩擦系数(μ > 0.4)或高界面断裂韧性(GII c > 0.1 N/mm)不会发生脱粘。
{"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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.042
Pieter Hofman, Lu Ke, Frans P. van der Meer
A common choice for multiscale modelling of the mechanical response of composites is to use periodic boundary conditions (PBCs) on square representative volume elements (RVEs). these PBCs over-constrain the response when strain localization takes place in bands that are not compatible with the imposed periodic constraints. PBCs periodicity the mapping matrix-fiber RVEs, of fibers cross edges, the of localization of circular RVEs with PBCs to obtain a micromodel with transversely isotropic response. the original formulation proposed in to the full softening response due to over-constraining when cracks reach the boundary. we propose a modification to the PBCs which allows for cracks to cross the edges.
{"title":"Circular Microstructural Volume Elements With Periodic Boundary Conditions for Localization Problems","authors":"Pieter Hofman, Lu Ke, Frans P. van der Meer","doi":"10.23967/composites.2021.042","DOIUrl":"https://doi.org/10.23967/composites.2021.042","url":null,"abstract":"A common choice for multiscale modelling of the mechanical response of composites is to use periodic boundary conditions (PBCs) on square representative volume elements (RVEs). these PBCs over-constrain the response when strain localization takes place in bands that are not compatible with the imposed periodic constraints. PBCs periodicity the mapping matrix-fiber RVEs, of fibers cross edges, the of localization of circular RVEs with PBCs to obtain a micromodel with transversely isotropic response. the original formulation proposed in to the full softening response due to over-constraining when cracks reach the boundary. we propose a modification to the PBCs which allows for cracks to cross the edges.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"52 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":"127876903","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.040
L. Ke, F. van den Meer
{"title":"Multiscale Modeling of Composite Laminates Delamination via Computational Homogenization","authors":"L. Ke, F. van den Meer","doi":"10.23967/composites.2021.040","DOIUrl":"https://doi.org/10.23967/composites.2021.040","url":null,"abstract":"","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":"129187838","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}
Pub Date : 1900-01-01DOI: 10.23967/composites.2021.056
M. Fagerstr¨om, G. Catalanotti, Wuyang Zhao, S. Pfaller
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.
{"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}
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