Composite Structures最新文献_第9页

Geometrically nonlinear analysis of layered beams using symbolic approach 利用符号方法对层状梁进行几何非线性分析

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-24 DOI: 10.1016/j.compstruct.2024.118583

U. Rodman , D. Zupan , T. Šuštar , J. Korelc

引用次数: 0

Translaminar fracture toughness characterisation for a glass fibre/polyamide 6 laminated composite by a novel approach based on fictitious material concept 基于虚构材料概念的新方法表征玻璃纤维/聚酰胺 6 层压复合材料的横向断裂韧性

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-24 DOI: 10.1016/j.compstruct.2024.118605

Ali Reza Torabi , Andrea Carpinteri , Karolina Głowacka , Sobhan Mohammadi , Camilla Ronchei , Daniela Scorza , Andrea Zanichelli , Sabrina Vantadori

{"title":"Translaminar fracture toughness characterisation for a glass fibre/polyamide 6 laminated composite by a novel approach based on fictitious material concept","authors":"Ali Reza Torabi , Andrea Carpinteri , Karolina Głowacka , Sobhan Mohammadi , Camilla Ronchei , Daniela Scorza , Andrea Zanichelli , Sabrina Vantadori","doi":"10.1016/j.compstruct.2024.118605","DOIUrl":"10.1016/j.compstruct.2024.118605","url":null,"abstract":"<div><div>This paper proposes a novel approach for the characterisation of the material fracture toughness associated with translaminar tensile failure, consisting in the application of the Fictitious Material Concept (FMC) by using the testing configuration of the Modified Two Parameter Model (MTPM). The main advantage of such an approach is to avoid the use of nonlinear fracture mechanics for material fracture toughness characterisation. The novel approach is applied to compute the translaminar fracture toughness of a unidirectional glass fibre (GF)/polyamide 6 (PA6) laminated composite. Moreover, the experimental campaign carried out is numerically simulated by means of a micromechanical finite element model, and the fracture toughness is computed by employing two different approaches, that is, the novel one and the MTPM. The present study proves, for the first time, that the Fictitious Material Concept can be applied by considering both experimental and numerical structural responses since it provides, in both cases, quite satisfactory accuracy in term of laminated composite fracture toughness. Therefore, the great advantage is that, when a validated numerical model is available, experimental campaigns may be avoided, saving time and money. Moreover, it is proved that the FMC can be used to investigate specimen size effect on fracture toughness.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118605"},"PeriodicalIF":6.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization design for hole geometries and fiber steering of composite laminates with a hole 带孔复合材料层压板的孔几何形状和纤维转向优化设计

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-24 DOI: 10.1016/j.compstruct.2024.118611

Masataka Mizumoto , Kenji Asakawa , Yoshiyasu Hirano , Toshio Ogasawara

{"title":"Optimization design for hole geometries and fiber steering of composite laminates with a hole","authors":"Masataka Mizumoto , Kenji Asakawa , Yoshiyasu Hirano , Toshio Ogasawara","doi":"10.1016/j.compstruct.2024.118611","DOIUrl":"10.1016/j.compstruct.2024.118611","url":null,"abstract":"<div><div>The objective of this study is to use numerical simulation for investigating the effects of hole geometry and fiber steering on the strength of a carbon fiber reinforced plastic (CFRP) laminate with a hole. For the 0° layers of CFRP laminates, the fibers were aligned to the maximum principal stress direction under uniaxial tensile loading to simulate a curved (steered) fiber orientation. Using Bézier curves, 600 CFRP panel models with different hole geometries were generated. Then they were subjected to progressive failure analysis and buckling eigenvalue analysis under tensile and shear loading, respectively, for the quasi-isotropic (QI) and fiber-steered models. A genetic algorithm (GA) was used to perform a multi-objective optimization design with tensile strength and shear buckling load as objective functions. Results show that the curvilinear orientation of the fibers near the stress concentrations was effective for strength enhancement. For example, for a panel with a rhombic hole shape with no curvature at the hole edge, the strength enhancement effect of fiber steering tends to be considerable under both tensile and shear loading. Results show that a multi-objective optimal design can search for a hole shape that has 0.132–1.41 % higher strength than an elliptical hole under both tensile and shear loading.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118611"},"PeriodicalIF":6.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The multi-scale damage evolution of nano-modified concrete under the cold region tunnel environment based on micromechanical model 基于微机械模型的寒区隧道环境下纳米改性混凝土的多尺度损伤演变

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-24 DOI: 10.1016/j.compstruct.2024.118612

Wei Xia , Wei-kang Li , Jia-rui Rao , Zong-quan Jiang , Jiann-wen Woody Ju , Sheng-ai Cui

{"title":"The multi-scale damage evolution of nano-modified concrete under the cold region tunnel environment based on micromechanical model","authors":"Wei Xia , Wei-kang Li , Jia-rui Rao , Zong-quan Jiang , Jiann-wen Woody Ju , Sheng-ai Cui","doi":"10.1016/j.compstruct.2024.118612","DOIUrl":"10.1016/j.compstruct.2024.118612","url":null,"abstract":"<div><div>In cold region tunnel construction environments, concrete performance often deteriorates due to consistently low temperatures. Nanomaterials, as efficient admixtures, can significantly improve the pore structure of concrete. Given the significant impact of pore structure characteristics on concrete performance in cold regions, this study investigates the effects of nanomaterial modification on concrete using a micromechanical model. In-situ CT tests on nano-modified concrete provided digital volume images of the pore structure. The region-growing algorithm (RGA) and digital volume correlation (DVC) method were used to reveal pore structure evolution. The microscopic damage during the phase transition of pore water was analyzed based on the pre-melting dynamic theory and the micromechanical model. The fatigue damage mechanism and generalized self-consistent model were employed to study the macroscopic performance. The results indicate that while nanomaterials do not significantly inhibit the formation of small pores/defects in concrete, they can effectively prevent the interconnection between pores. This suppression leads to fewer larger pores forming. However, the thinner matrix concrete around these large pores results in more severe damage.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118612"},"PeriodicalIF":6.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

X-ray micro-computed tomography for mechanical behaviour analysis of Automated Fiber Placement (AFP) laminates with integrated gaps and overlaps 利用 X 射线微型计算机断层扫描技术分析集成间隙和重叠的自动纤维铺放 (AFP) 层压板的机械性能

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-23 DOI: 10.1016/j.compstruct.2024.118601

Fabian Diemar , John Holmes , Silvano Sommacal , David Aparici-Böhlke , Benno Böckl , Klaus Drechsler , Paul Compston

{"title":"X-ray micro-computed tomography for mechanical behaviour analysis of Automated Fiber Placement (AFP) laminates with integrated gaps and overlaps","authors":"Fabian Diemar , John Holmes , Silvano Sommacal , David Aparici-Böhlke , Benno Böckl , Klaus Drechsler , Paul Compston","doi":"10.1016/j.compstruct.2024.118601","DOIUrl":"10.1016/j.compstruct.2024.118601","url":null,"abstract":"<div><div>Automated Fiber Placement (AFP) is a manufacturing technique widely used for the serial production of aerospace parts. A deep understanding of the effect of lay-up defects is crucial for part and lay-up design. Currently, numerical models for structural simulation lack a precise representation of the internal structure of AFP laminates, which is crucial for understanding the impact of defects on mechanical properties. This paper presents a novel approach based on high-resolution micro-computed tomography (micro-CT) scans from specimens manufactured with AFP, which automatically creates a mesoscale numerical model incorporating as-fabricated defect morphologies. The hexahedral mesh, generated from the segmented plies of the micro-CT volume, accounts for ply thickness and out-of-plane fiber orientation. This approach is verified with mechanical testing and digital image correlation (DIC) under tensile loading. The simulation results align closely with experimental testing and accurately illustrate the influence of fiber waviness in various defect configurations, such as gaps and overlaps. The study shows that lay-up defects can lead to knockdown factors of up to 12% in tensile properties, with each defect creating a distinct pattern in the local strain. This model can serve as a benchmark for further numerical simulations and surrogate models of defect configurations under varying loading conditions.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118601"},"PeriodicalIF":6.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Periodic free vibrations of composite laminates with curvilinear fibres and CNTs 带有曲线纤维和碳纳米管的复合材料层压板的周期性自由振动

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-23 DOI: 10.1016/j.compstruct.2024.118598

Hamed Akhavan, Pedro Camacho, Pedro Ribeiro

{"title":"Periodic free vibrations of composite laminates with curvilinear fibres and CNTs","authors":"Hamed Akhavan, Pedro Camacho, Pedro Ribeiro","doi":"10.1016/j.compstruct.2024.118598","DOIUrl":"10.1016/j.compstruct.2024.118598","url":null,"abstract":"<div><div>This article addresses the combined effect of using curvilinear fibres and carbon nanotubes (CNTs) reinforcements in the non-linear modes of vibration of laminated composite plates. To arrive at the material properties of the three-phase composite material, a two-step hierarchic procedure is followed. A modified version of the Halpin–Tsai model is employed to predict the Young’s modulus of the CNT enriched resin and expressions, deduced from equilibria of a unit cell where a fibre is embedded in resin, are applied to obtain the diverse elasticity moduli of the three-phase composite. Moderately large displacements are considered, with von Kármán strain–displacement relations. Although the presented model is an equivalent single layer one, it applies to thick plates, because a Third-order Shear Deformation Theory (TSDT) is followed. The set of autonomous non-linear equations of motion is reduced using static condensation and a modal basis with selected modes, chosen after a convergence analysis. The reduced set of equations of motion is solved by the shooting method. Numerical tests considering plates with diverse curvilinear fibre paths, CNT contents and thicknesses are carried out. The results obtained are thoroughly analysed.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118598"},"PeriodicalIF":6.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Higher-order sensitivity analyses to understand the role of FE input parameters on the simulation of composites in progressive fracture tests 通过高阶敏感性分析了解 FE 输入参数对复合材料在渐进式断裂测试中的模拟作用

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-23 DOI: 10.1016/j.compstruct.2024.118585

Johannes Reiner

{"title":"Higher-order sensitivity analyses to understand the role of FE input parameters on the simulation of composites in progressive fracture tests","authors":"Johannes Reiner","doi":"10.1016/j.compstruct.2024.118585","DOIUrl":"10.1016/j.compstruct.2024.118585","url":null,"abstract":"<div><div>With the rise of data-driven engineering methods, such as machine learning, a comprehensive understanding of the underlying data fed into these algorithms is required for effectively applying these methods. This study presents two highly efficient Finite Element (FE) models that operate at different length scales, based on Continuum Damage Mechanics (CDM). The combination with Random Sampling-High Dimensional Model Representation (RS-HDMR) enables the determination of influential FE input parameters and their correlations to simulate Fibre Reinforced Polymer (FRP) composites subjected to a variety of progressive fracture tests in tension and compression. The results indicate that laminate-based models utilise the FE input parameters efficiently where all parameters are found to be influential. On the other hand, only fibre-related properties are relevant in ply-based FE models, with all input parameters related to transverse properties deemed to be non-influential. The findings of this study aid in identifying suitable fracture tests for a meaningful calibration and validation of CDM-based FE models. Moreover, the study lays the foundation for understanding the role of input parameters within data-driven methods, and for developing efficient reduced-order models or surrogates for uncertainty quantification on the damage tolerance of FRP composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118585"},"PeriodicalIF":6.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel advanced block assembly method with 3D printed channel systems 采用 3D 打印通道系统的新型先进积木组装方法

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-23 DOI: 10.1016/j.compstruct.2024.118584

Tae Hee Lee , Kwonhwan Ko , Jung-Wuk Hong

引用次数: 0

A comprehensive study on porosity modelling and its impact on fracture behavior of edge cracked FG structures using XIGA 利用 XIGA 对孔隙率建模及其对边缘开裂 FG 结构断裂行为的影响进行综合研究

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-23 DOI: 10.1016/j.compstruct.2024.118602

Sushant Kumar, Gagandeep Bhardwaj, Neeraj Grover

{"title":"A comprehensive study on porosity modelling and its impact on fracture behavior of edge cracked FG structures using XIGA","authors":"Sushant Kumar, Gagandeep Bhardwaj, Neeraj Grover","doi":"10.1016/j.compstruct.2024.118602","DOIUrl":"10.1016/j.compstruct.2024.118602","url":null,"abstract":"<div><div>In the present work, the fracture analysis of functionally graded (FG) porous structure containing an edge cracked is carried out in the presence of different types of porosity distributions using extended isogeometric analysis (XIGA). Firstly, the different types of porosity distribution functions are mathematically modeled in the porous FG structure across the length of the domain. The effective properties of the porous FG structure are computed using power law. Also, an additional term of porosity is incorporated in the power law to include the effect of porosity in the FG structure. The effective properties are computed across the length of the structure in the presence of different types of porosity distributions. Further, a pre-existing crack is modeled in the domain to study its influence on the fracture behaviour of porous FG structure using XIGA. To validate the accuracy, the results for the non-porous FG structure are compared with the available results in the literature (with the analytical and numerical solution), and they are found in good agreement (percentage error in the range of 0.04–––1.78%). Moreover, the comparative study is performed to investigate the influence of different types of porosity distributions on the fracture behaviour of FG structure.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118602"},"PeriodicalIF":6.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective optimization for a composite pressure vessel with unequal polar openings 对不等极开口复合压力容器进行多目标优化

IF 6.3 2区材料科学

Composite Structures Pub Date : 2024-09-22 DOI: 10.1016/j.compstruct.2024.118594

Lyudmyla Rozova , Bilal Meemary , Salim Chaki , Mylene Deléglise-Lagardère , Dmytro Vasiukov

{"title":"Multi-objective optimization for a composite pressure vessel with unequal polar openings","authors":"Lyudmyla Rozova , Bilal Meemary , Salim Chaki , Mylene Deléglise-Lagardère , Dmytro Vasiukov","doi":"10.1016/j.compstruct.2024.118594","DOIUrl":"10.1016/j.compstruct.2024.118594","url":null,"abstract":"<div><div>Multi-objective parametric optimization problem is presented for overwrapped composite pressure vessels under internal pressure for storage and heating water. It is solved using the developed iterative optimization algorithm. Optimal values of design parameters for the vessel are obtained by varying the set of parameters for composite layers, such as the thickness of layers and radii of polar openings, which influence the distribution of fiber angles along the vessel. The suggested optimization methodology is based on the mechanical solution for composite vessels and the satisfaction of the main failure criteria. An innovative approach lies in the possibility of using the developed optimization methodology for designing vessels with non-symmetrical filament winding, which have unequal polar openings on the domes. This became possible due to the development of a special numerical mechanical finite element model of a composite vessel. A specific Python program provides the creation of a model and controls the exchange of data between the modules of the iterative optimization process. The numerical model includes the determination of the distribution of fiber angles on the domes and cylindrical part of the vessel as well as changes in layer thicknesses. The optimization problem solution is provided using a Multi-Island Genetic Algorithm, this type of method showed its efficiency for such applications, by allowing to avoid local solutions. Thus, optimal parameters of a composite vessel were found by minimizing composite mass and thickness and maximizing the strain energy. Test solutions using the developed methodology are presented for three types of composite materials to evaluate their possibility for integration into the vessel design model.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"351 ","pages":"Article 118594"},"PeriodicalIF":6.3,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263822324007220/pdfft?md5=56e33750713a1a5af6ac392b8ae68ea2&pid=1-s2.0-S0263822324007220-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0