VIII Conference on Mechanical Response of Composites最新文献_第3页

The Influence of the Internal Pressure on the Impact Behavior of Composite-Overwrapped Pressure Vessels 内压对复合材料包覆压力容器冲击性能的影响

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.082

M. Fagerström, G.Catalanotti, R. Weerts, O. Cousigné, Klaas Kunze, M. Geers, J. Remmers

引用次数: 0

Fracture Properties of Agglomerated Nanoparticle Reinforced Polymers: A Coarse-Grained Model 团聚纳米颗粒增强聚合物的断裂性能:一个粗粒度模型

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.083

A. Mousavi, B. Arash, R. Rolfes

{"title":"Fracture Properties of Agglomerated Nanoparticle Reinforced Polymers: A Coarse-Grained Model","authors":"A. Mousavi, B. Arash, R. Rolfes","doi":"10.23967/composites.2021.083","DOIUrl":"https://doi.org/10.23967/composites.2021.083","url":null,"abstract":"Adding boehmite nanoparticles inside epoxy materials shows outstanding potential in improving the fracture properties. Coarse-grained models for pure epoxy and agglomerated boehmite nanoparticle/epoxy nanocomposites with initial single-edged cracks are developed. An optimization assisted modiﬁed iterative Boltzmann inversion method is proposed to calibrate coarse-grained force ﬁelds. Furthermore, the coarse-grained force ﬁeld of nanoparticles is obtained using the strain energy conservation between coarse-grained models and all-atom systems [1]. In the proposed model, the energy release rate is obtained from the load-displacement curve of specimens [2]. Due to the size of the agglomerated boehmite nanoparticles, the molecular dynamic approach is not able to capture the fracture properties of agglomerated boehmite nanoparticle/epoxy nanocomposite; therefore, the existence of a coarse-grained model is crucial. The applicability of the coarse-grained model to estimate the fracture properties of the polymer reinforced nanocomposites is evaluated using experimental data. It is shown that the fracture properties of the nanocomposites depend on the weight fraction and distribution of nanoparticles. The dependence of the critical energy release rate on the initial crack length is also studied.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"179 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":"114381924","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

Enabling Multiscale Analysis of Very Large Composite Structures 实现超大复合材料结构的多尺度分析

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.123

S. Pinho, M. Matos, R. Costa, A. Ibbotson, M. Ostergaard

引用次数: 0

On Correlations Between Local Microstructure and The Appearance of Fibre Breaks in Unidirectional Composite Materials 单向复合材料中局部微观结构与纤维断裂的相关性研究

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.036

C. Breite, S. Lomov, Y. Swolfs

{"title":"On Correlations Between Local Microstructure and The Appearance of Fibre Breaks in Unidirectional Composite Materials","authors":"C. Breite, S. Lomov, Y. Swolfs","doi":"10.23967/composites.2021.036","DOIUrl":"https://doi.org/10.23967/composites.2021.036","url":null,"abstract":"The recent development of a high precision fibre segmentation method by Emerson et al. [1] enabled the automated identification of fibre breaks in unidirectional composites (Breite et al. [2]). It is now possible to investigate the correlation of microstructural parameters of the fibre trajectories with the formation of fibre breaks and clusters of fibre breaks. The dataset used in the present study is based on the fibre trajectories segmented from a volume of ~0.36 mm 3 , taken out from a flat sample, in-situ loaded under synchrotron radiation computed tomography to a tensile stress corresponding to 91% of the ultimate tensile stress. It consists of ~5000 fibres, ~9∙10 5 fibre segments of ~6.5 μm length and 92 fibre breaks. Statistical comparisons have been performed for the local fibre volume fraction, fitted sinusoidal parameters as measures for the local fibre waviness and the local in-plane and out-of-plane fibre angles measured in each of the fibre segments. The statistical methodology relies on repeated resampling from large population down to the size of the sparsely populated fibre breaks data. Insights were gained on differences between distributions of the microstructure parameters near broken fibres vs. un-broken fibres, fibre break sites vs. intact regions and single fibre break sites vs. clustered fibre break sites (Figure 1). In contrast to earlier work by Rosini et al. [3], the present work demonstrates a previously unknown link between the local disturbance of the alignment angles and the formation of fibre break clusters. This result highlights a major drawback in most state-of-the-art tensile failure models, which do not consider the micro-scale misalignment","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"3 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":"127630993","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

Computationally Efficient Modeling of Delamination Behavior in Laminated Composites 层合复合材料分层行为的高效计算模型

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.057

K. Anam, M. Todt, H. Pettermann

引用次数: 1

Mechanical Response of Highly Deformable thin Shell Composites 高变形薄壳复合材料的力学响应

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.044

A. Schlothauer, G. Pappas, P. Ermanni

引用次数: 0

Evaluation of the Influence of the Matrix-inclusion Interface Based on FFT Methods 基于FFT方法的矩阵-包含界面影响评价

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.048

T. Do, P. Karamian

引用次数: 0

Prediction of Damages Induced by a Low-Velocity Impact on Last Generation Composite Laminates 上一代复合材料层合板低速撞击损伤预测

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.107

S. Chaibi, C. Bouvet, F. Laurin, J. Rannou, J. Berthe, F. Congourdeau

{"title":"Prediction of Damages Induced by a Low-Velocity Impact on Last Generation Composite Laminates","authors":"S. Chaibi, C. Bouvet, F. Laurin, J. Rannou, J. Berthe, F. Congourdeau","doi":"10.23967/composites.2021.107","DOIUrl":"https://doi.org/10.23967/composites.2021.107","url":null,"abstract":"This work is dealing with an experimental and numerical study of the behavior and strength of a carbon/epoxy toughened composite material subjected to low-velocity impact [1]. A speciﬁc experimental device has been developped to monitor the evaluation of damage mechanisms during a low-velocity impact, using advanced instrumentation technologies (such as IR thermography and digital image correlation associated with superfast cameras) (Figure 1). Additionally, 3D nondestructive evaluation methods (X-ray tomography, ultrasonic scans) are considered in order to assess and understand the damage mechanisms in such a material. The tests have been simulated using a 3D FEM with contacts, a continuum damage model for the intra-ply damage (ﬁber failure and matrix damage) [2] and delamination modeling using cohesive elements. The impact problem is solved using an implicit solver while taking into account several sources of nonlinearities (geometrical, material and contacts). Experimental and numerical comparisons will be presented and discussed in order to evaluate the predictive capabilities of the proposed approach.","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"82 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":"126245523","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

Encounting for Intra/Interlaminar Coupling by Using both In-Plane and Out-of-Plane Strains in an Hybrid Interface Model 混合界面模型中面内和面外应变的层内/层间耦合求解

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.124

G. Lubineau, P. Hu

{"title":"Encounting for Intra/Interlaminar Coupling by Using both In-Plane and Out-of-Plane Strains in an Hybrid Interface Model","authors":"G. Lubineau, P. Hu","doi":"10.23967/composites.2021.124","DOIUrl":"https://doi.org/10.23967/composites.2021.124","url":null,"abstract":"The degradation modes of laminated composites have been studied for a long time. It is usual to distinguish between so-called “intralaminar” degradation mechanisms such as for example transverse cracks [1], and “interlaminar” mechanisms such as local or global delamination. One of the most difﬁcult tasks is to accurately predict how these different mechanisms interact with each other. A well-known example is precisely the coupling between intra-and inter-laminar damage which signiﬁcantly inﬂuences the mechanical response of laminates. These coupling mechanisms can be harmful (for example when transverse cracking accelerates degradation by local delamination of the interface) or beneﬁcial (when transverse cracking activates new modes of interfacial dissipation, and in particular large-scale bridging mechanisms [2]). The objective of this presentation is to pave the way for a pragmatic and efﬁcient modeling of these effects. For this, we ﬁrst contribute to the enrichment of experimental knowledge on this point, by the systematic study of the evolution of the bridging of the interlaminar interface as a function of the density of intralaminar cracks. Original tests are developed, for which cross-ply composites are ﬁrst pre-cracked under plane loading in order to introduce a pre-deﬁned crack density. These sequences are then subjected to macroscopic delamination tests, in order to evaluate the effect of this pre-cracking on the interface tenacity. Secondly, a modeling approach is proposed, based on a new type of interface model [3]. Unlike the classical cohesive elements, which only consider the out-of-plane part of the","PeriodicalId":392595,"journal":{"name":"VIII Conference on Mechanical Response of Composites","volume":"53 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":"116971327","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

Modelling Damage Growth Using a Physically-Based and Finite Deformation Model 使用基于物理的有限变形模型模拟损伤增长

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI: 10.23967/composites.2021.073

S´ergio Costa, Hana Zrida, Miguel Herraez, Robin Olsson, Rickard ¨Ostlund

引用次数: 0