Composite Structures最新文献_第7页

Differential evolution algorithm and artificial neural network surrogate model for functionally graded material homogenization and design

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-11 DOI: 10.1016/j.compstruct.2025.119041

Marek Wojciechowski , Marek Lefik , Daniela P. Boso

{"title":"Differential evolution algorithm and artificial neural network surrogate model for functionally graded material homogenization and design","authors":"Marek Wojciechowski , Marek Lefik , Daniela P. Boso","doi":"10.1016/j.compstruct.2025.119041","DOIUrl":"10.1016/j.compstruct.2025.119041","url":null,"abstract":"<div><div>In this paper, the differential evolution (DE) algorithm is employed to design functionally graded materials (FGMs). The design problem is formulated as a constrained optimization, where the objective function represents the global requirements of the macroscopic boundary value problem (BVP<sup>m</sup>), and the constraints account for the feasibility (or manufacturability) of the generic microstructure. During optimization, the local constitutive behavior of the material, such as the components of the anisotropic effective stiffness tensor, is derived using homogenization theory, which involves solving the microscopic boundary value problem (BVP<sup>µ</sup>). Both the macro and micro problems are solved using the finite element method. To accelerate computations, artificial neural networks (ANNs), trained with pre-computed homogenization data, are used as a surrogate homogenization model for the FGM optimization process. The examples presented demonstrate that using ANNs can reduce the optimization effort by several orders of magnitude, even when accounting for the computational cost of database preparation and ANN training. The proposed approach for designing FGMs has proven to be both efficient and reliable for the considered generic microstructure and example global problems. Moreover, the method is general enough to be applied to more complex microstructures and diverse global requirements.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119041"},"PeriodicalIF":6.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683531","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

Simplified model for the tool-part interaction in spring-in of L-shape composite laminates

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-11 DOI: 10.1016/j.compstruct.2025.119022

Shuang Yan, Mikhail Matveev, Wenxuan Qi, Nicholas Warrior

{"title":"Simplified model for the tool-part interaction in spring-in of L-shape composite laminates","authors":"Shuang Yan, Mikhail Matveev, Wenxuan Qi, Nicholas Warrior","doi":"10.1016/j.compstruct.2025.119022","DOIUrl":"10.1016/j.compstruct.2025.119022","url":null,"abstract":"<div><div>Manufacturing of fibre-reinforced composites is often accompanied by process-induced distortions, primarily due to the anisotropy of the composites constituents (fibres and matrix), their thermo-chemical interactions, and the interaction between the composite and the tooling. Numerical models that account for these factors require extensive experimental material and process characterisation programmes before the models can be effectively used at the design stage. This paper presents experimental measurements of spring-in angles of L-shape IM7/8552 laminates cured on an aluminium mould. The curing process for L-shape laminates was simulated using the Cure Hardening Instantaneously Linear Elastic model. Tool-part interaction was characterised by fitting an analytical model to experimental measurements of warpage of flat laminates and modelled using boundary conditions designed to avoid the need for explicit modelling of the tooling. The spring-in angles predicted by the proposed simulation framework were within <span><math><mrow><mn>0</mn><mo>.</mo><msup><mrow><mn>5</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> of the experimental results for the range of geometries considered. The simulations provided insights into the effects of specimen design (corner radius, flange length, and lay-up) as well as tool-part interaction on the total spring-in angle. It was shown that tool-part interaction significantly contributes to the spring-in angle, particularly in specimens with larger flange lengths.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119022"},"PeriodicalIF":6.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683479","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

Constitutive identification of materials with different symmetry classes through a genetic algorithm

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-11 DOI: 10.1016/j.compstruct.2025.119001

Marco Colatosti, Greta Ongaro, Marco Pingaro, Patrizia Trovalusci

{"title":"Constitutive identification of materials with different symmetry classes through a genetic algorithm","authors":"Marco Colatosti, Greta Ongaro, Marco Pingaro, Patrizia Trovalusci","doi":"10.1016/j.compstruct.2025.119001","DOIUrl":"10.1016/j.compstruct.2025.119001","url":null,"abstract":"<div><div>Composite materials play a primary role in many engineering applications. However, their mechanical description proves challenging because, at finer scales, they are characterised by the presence of significant heterogeneities in size and texture, which affect the macroscopic response of the materials. Classical continuum models are not always suitable for describing the macroscopic behaviour of such materials, especially when it is important to consider the microscopic level. To adequately address scale effects, several non-classical/non-local formulations have been proposed in the literature. Among these, the micropolar model, which is a non-local model of “implicit” type, has proven to be effective in representing the mechanical behaviour of anisotropic media, taking into account the arrangement, size, and orientation of particles. Within this context, this work focuses on modelling composites both as continuous and discrete systems, with the latter providing a finer description of the material. The aim of the study is to identify micropolar elastic constants of composite materials represented as rigid blocks and thin elastic interfaces. A heuristic optimisation approach based on the Differential Evolution algorithm is adopted to derive the constitutive micropolar parameters by exploiting the results of static and dynamic analyses performed on the discrete systems. The obtained results, for different material symmetry classes, indicate that the proposed strategies provide satisfactory outcomes, paving the way for experimental validation and potential engineering applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"360 ","pages":"Article 119001"},"PeriodicalIF":6.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610786","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

New analytical buckling solutions for non-Lévy-type graphene-reinforced composite laminated plates

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-10 DOI: 10.1016/j.compstruct.2025.119067

Zixuan Wang , Dian Xu , Jinbao Li , Zhaoyang Hu , Guangping Gong , Rui Li

引用次数: 0

Bio-inspired hybrid composite fabrication 3D-printing approach for multifunctional flexible wearable sensors applications

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-10 DOI: 10.1016/j.compstruct.2025.119046

Muhammad Imran Farid, Wenzheng Wu, Guiwei Li, Yitong Sun, Zhibo Zhang, Fangyu Zhang

{"title":"Bio-inspired hybrid composite fabrication 3D-printing approach for multifunctional flexible wearable sensors applications","authors":"Muhammad Imran Farid, Wenzheng Wu, Guiwei Li, Yitong Sun, Zhibo Zhang, Fangyu Zhang","doi":"10.1016/j.compstruct.2025.119046","DOIUrl":"10.1016/j.compstruct.2025.119046","url":null,"abstract":"<div><div>A bio-inspired, hybrid, multifunctional flexible sensor is developed for wearable applications. The hybrid sensor is fabricated using Fused Deposition Modeling (FDM) 3D printing and incorporates significant technical innovations. This sensor integrates a thermoplastic polyurethane (TPU-base core body) filament, graphene, and Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) PEDOT: PSS made-composite, utilizing a novel dip-coating technique to create high-aspect-ratio channels. Critically, we have developed a new method to compensate for drooping in bridging layers during the FDM printing process, a significant challenge in achieving precise microstructures. Demonstrating its potential for strain, temperature, pressure, and health monitoring. Results exhibit a high gauge factor (GF) of ≈4033.2 at 30 % tensile strain, detect strains as low as 0.01 %, and achieve a stretchability of 250 %. Furthermore, it demonstrates sensitivity to pressures ranging (max 150 %, mini 10 Pa), dynamic stretching (at 2, 6, 9, 10, 18, 21 mm), and thermal performance (0–90 °C). Subsequently, we propose on-site monitoring; the sensor’s ability to detect subtle and vigorous human motions is highlighted, suggesting its suitability for bodily deformations including subtle movements. This approach, incorporating these key fabrication innovations, paves the way for advanced wearable sensors capable of detecting a wide range of human motions for diverse healthcare applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119046"},"PeriodicalIF":6.3,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644310","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

Effects of shear connection methods on the performance of UHPFRC-NC hybrid beams with U-shaped GFRP stay-in-place formworks

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-10 DOI: 10.1016/j.compstruct.2025.119052

Yaqi Li , Zihua Zhang , Zhenjun Yang , Muhirwa Fernand , Tao Jiang

{"title":"Effects of shear connection methods on the performance of UHPFRC-NC hybrid beams with U-shaped GFRP stay-in-place formworks","authors":"Yaqi Li , Zihua Zhang , Zhenjun Yang , Muhirwa Fernand , Tao Jiang","doi":"10.1016/j.compstruct.2025.119052","DOIUrl":"10.1016/j.compstruct.2025.119052","url":null,"abstract":"<div><div>This paper investigates the effects of shear connection methods on the performance of Ultra-high performance fiber reinforced concrete (UHPFRC)-normal concrete (NC) hybrid beams with U-shaped glass fiber-reinforced polymer (GFRP) stay-in-place (SIP) formworks. A total of 21 beams were tested under three-point bending to evaluate their load capacity, failure mechanisms, strain evolution, and cost performance. The specimens included 15 hybrid beams with various shear connection methods—resin-bonding, resin-bonding plus I-shaped GFRP profiles, and resin-bonding plus steel bolts at different spacings—as well as six control beams without SIP formworks for comparison. The complex microscale failure mechanisms were visualized through μXCT scanning. Results indicated that GFRP connectors demonstrated the highest bonding performance and load capacity among all connection methods, while steel bolt connectors provided the best post-failure ductility. The incorporation of SIP formworks significantly enhanced the structural performance of the hybrid beams, maximizing the utilization of UHPFRC’s high compressive strength. Compared to traditional reinforced UHPFRC beams, the hybrid beams achieved 22.7% higher peak loads while reducing UHPFRC usage by 63.2%. Cost effective analysis revealed that hybrid beams with GFRP connectors exhibit the best cost performance among different shear connection methods, with 68.2% higher than that of traditional reinforced UHPFRC beams.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"360 ","pages":"Article 119052"},"PeriodicalIF":6.3,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601291","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

Adaptive 3D multi-patch isogeometric analysis for orthotropic solid

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-09 DOI: 10.1016/j.compstruct.2025.119028

Lin Wang , Tiantang Yu , Weihua Fang

引用次数: 0

Bending damage of novel UV-CGFR composites for pipeline rehabilitation: Experimental characterization and numerical simulation

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-09 DOI: 10.1016/j.compstruct.2025.119065

Yangyang Xia , Chao Zhang , Cuixia Wang , Jing Wang , Xinxin Sang , Peng Zhao , Hongyuan Fang

{"title":"Bending damage of novel UV-CGFR composites for pipeline rehabilitation: Experimental characterization and numerical simulation","authors":"Yangyang Xia , Chao Zhang , Cuixia Wang , Jing Wang , Xinxin Sang , Peng Zhao , Hongyuan Fang","doi":"10.1016/j.compstruct.2025.119065","DOIUrl":"10.1016/j.compstruct.2025.119065","url":null,"abstract":"<div><div>In this paper, a finite element numerical model of the bending damage of ultraviolet-cured glass fiber reinforced (UV-CGFR) composites was developed based on the results of the three-point bending test and X-ray tomography (Micro-CT), as well as infrared thermography (IRT) and other microscopic and macroscopic characterization tests. The numerical model, incorporating the three-dimensional Hashin failure criterion via the VUMAT subroutine, was established to predict the bending failure process and damage energy of UV-CGFR composites from the perspectives of fracture damage and energy dissipation. The effects of curing time, UV irradiation intensity, and loading rate on the bending properties and bending failure mechanism of UV-CGFR composites were systematically investigated. The primary failure modes observed were resin compression-tensile fractures, fiber tensile fractures, interlaminar debonding, and delamination. The bending strength and bending modulus of UV-CGFR composites increase and decrease with the increase of curing time and irradiation intensity; the bending strength increases with the loading rate, and the bending modulus is less affected by the loading rate. The temperature rise effect generated by fiber tensile fractures and interlaminar debonding was identified as a key factor contributing to the enhancement of bending strength. The temperature increase became more pronounced with higher loading rates, reaching a maximum rise of 5.2℃. Furthermore, the feasibility of UV-CGFR composites for pipeline repair was validated through pipe ring bending tests. The results show that the bending damage behaviour of UV-CGFR composites aligns well with real-world engineering applications, and the UV-CGFR composite lining repair significantly enhanced the pipeline’s load-bearing properties.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"360 ","pages":"Article 119065"},"PeriodicalIF":6.3,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610895","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

Theoretical and numerical study of crashworthiness of asymmetric gradient-hierarchical bi-hexagonal tubes

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-08 DOI: 10.1016/j.compstruct.2025.119033

Quanping Fu , Xiaolin Deng , Shen Xu

{"title":"Theoretical and numerical study of crashworthiness of asymmetric gradient-hierarchical bi-hexagonal tubes","authors":"Quanping Fu , Xiaolin Deng , Shen Xu","doi":"10.1016/j.compstruct.2025.119033","DOIUrl":"10.1016/j.compstruct.2025.119033","url":null,"abstract":"<div><div>Previous studies have demonstrated that multi-cell bi-tubular tubes exhibit superior energy absorption capacity when compared to multi-cell tubes. In order to further enhance the energy absorption capacity of multi-cell bi-tubular tubes, this paper proposes an asymmetric gradient hierarchical bi-hexagonal tube (AGBT), which draws inspiration from the microstructure of the impact region of shrimp chelipeds and asymmetrical tree-like fractal structures. The results show that, under equal wall thickness conditions, the specific energy absorption and crushing force efficiency of the proposed 3rd order asymmetric gradient hierarchical bi-hexagonal tube (AGBT-3) are respectively 1.82 and 1.47 times higher than those of the conventional bi-hexagonal tube. Furthermore, under equal mass conditions, the specific energy absorption and crushing force efficiency of AGBT-3 are enhanced by up to 21% and 27%, respectively, in comparison to 0th order asymmetric gradient hierarchical bi-hexagonal tube (AGBT-0). These findings establish a clear advantage of the proposed AGBT-3 over AGBT-0 in terms of crashworthiness. Additionally, this study also conducts a theoretical prediction of the mean crushing force of the proposed AGBT, based on the simplified super folding element theory, and observes a good agreement between the theoretical prediction and numerical results. The outcomes of this study will serve as a valuable reference for the design and optimization of novel lightweight thin-walled energy-absorbing structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"360 ","pages":"Article 119033"},"PeriodicalIF":6.3,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610826","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

Repeated and multiple hail impacts on honeycomb sandwich panels: An experimental and numerical study

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-08 DOI: 10.1016/j.compstruct.2025.119055

Mohammad Haghgoo , Mojtaba Sadighi , Mohammad Mohammadi Aghdam , Reza Hedayati

{"title":"Repeated and multiple hail impacts on honeycomb sandwich panels: An experimental and numerical study","authors":"Mohammad Haghgoo , Mojtaba Sadighi , Mohammad Mohammadi Aghdam , Reza Hedayati","doi":"10.1016/j.compstruct.2025.119055","DOIUrl":"10.1016/j.compstruct.2025.119055","url":null,"abstract":"<div><div>Sandwich panels are often utilized in structures to enhance stability, reduce weight, and simplify repairs. Airplanes equipped with honeycomb core sandwich panels are susceptible to hail impact damage. This type of damage can cause barely visible impact damage (BVID), which affects the core but not the face sheets. The main objective of this study is to examine the failure mechanisms of the Nomex honeycomb sandwich panel when subjected to single, repeated (i.e. at the same location), and multiple (i.e. at different locations) hail impacts. The experimental study was conducted to investigate the hail’s behavior upon impact on rigid structures and, subsequently, to assess the failure modes of sandwich structures under repeated hail impacts. The objective was to develop a suitable numerical model for studying the response of sandwich structures under multiple and random hail impacts. The sandwich panel, which consisted of four layers of woven glass epoxy as the face sheet and a Nomex honeycomb layer with a thickness of 16 mm as a core, was tested for its resilience to repeated hail impacts with 5, 10, 15, and 20 impacts. Four failure mechanisms were observed in the sandwich plate, including delamination growth at the top face sheet and three types of failure in the core. The core failures, initiated with wrinkling of the core walls, progressed to wall rupturing at higher impacts and, after 15 impacts, separated the face sheet from the core. Numerical models were then deployed to investigate the effects of hail size in a single impact and the effect of the random distribution of multiple hail impacts. The severity of damage caused by multiple impacts from lower-energy hail (30 mm in size at 21 m/s) was in a similar level as damage from a single impact by higher-energy hail (>40 mm in size at 30 m/s). The damage was almost initiated after eight impacts under the site<del>,</del> which experienced two close impacts.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"360 ","pages":"Article 119055"},"PeriodicalIF":6.3,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610894","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