Composites Part C Open Access最新文献_第4页

Experimental study on a new generation of recycled composite laminates 新一代可回收复合材料层压板的试验研究

IF 5.3

Composites Part C Open Access Pub Date : 2025-02-13 DOI: 10.1016/j.jcomc.2025.100571

P. Bettini , L. Calervo , R. Palazzetti

{"title":"Experimental study on a new generation of recycled composite laminates","authors":"P. Bettini , L. Calervo , R. Palazzetti","doi":"10.1016/j.jcomc.2025.100571","DOIUrl":"10.1016/j.jcomc.2025.100571","url":null,"abstract":"<div><div>Composite manufacturing processes generate a significant amount of waste due to the raw material being supplied in sheet form and cut-outs. The unused scraps of prepreg are typically discarded, leading to the disposal of up to 35 % of the purchased material, accompanied by economic losses and negative environmental impacts. The authors propose collecting these scraps, cutting them into smaller, regular patches, and assembling them into a new, patched prepreg sheet. This study presents an experimental investigation into the mechanical properties of such patched material, assembled using two different architectures and three patch geometries. Five different configurations are designed, manufactured, and tested, with results compared to samples made from the original unpatched material through four-point bending tests. When patches are assembled in a regular geometry, the new material possesses around 50 % and 90 % of the original strength and stiffness, respectively, demonstrating potential for use in load-bearing applications. The methods of assembling the patches following a regular pattern also resulted in significantly better properties than a random deposition, which despite its lower cost to implement does not retain relevant mechanical characteristics. Of the two arranged investigated architectures, the one being more complex to manufacture shows 9 % and 5 % higher stiffness and strength, respectively, than the simpler one. Fracture analysis shows that failure mainly takes place in between of a patch, rather than the superposition areas.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100571"},"PeriodicalIF":5.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of fiber orientation on the strength of thermoplastic composite tubes subject to four-point bending 纤维取向对四点弯曲热塑性复合管强度的影响

IF 5.3

Composites Part C Open Access Pub Date : 2025-02-10 DOI: 10.1016/j.jcomc.2025.100569

Mohammadali Rastak , Suong Van Hoa

引用次数: 0

Static and fatigue behaviour of hybrid step-lap joints in thick primary metallic aircraft structures 厚初级金属飞机结构阶梯搭接混合接头的静力与疲劳性能

IF 5.3

Composites Part C Open Access Pub Date : 2025-02-08 DOI: 10.1016/j.jcomc.2025.100567

Amir Ekladious , John Wang , Nabil Chowdhury , Alan Baker , Wing Kong Chiu

{"title":"Static and fatigue behaviour of hybrid step-lap joints in thick primary metallic aircraft structures","authors":"Amir Ekladious , John Wang , Nabil Chowdhury , Alan Baker , Wing Kong Chiu","doi":"10.1016/j.jcomc.2025.100567","DOIUrl":"10.1016/j.jcomc.2025.100567","url":null,"abstract":"<div><div>This study investigates the static and fatigue performance of bonded, mechanically fastened, and hybrid step-lap metallic joints in primary thick aircraft structures, focusing on both baseline configurations, representing optimally assembled joints with designed inherent strength, and those assembled with predefined bondline defects to simulate practical imperfections, that can go undetected by current non-destructive inspection techniques. The results demonstrate that hybrid joints, which integrate fasteners with adhesive bonding, significantly enhance static and fatigue failure resistance compared to traditional methods. While purely bonded joints nearly restore original stiffness, they remain prone to abrupt failure, particularly in the presence of undetectable bondline defects. In contrast, the hybrid joints tested in this study extended the fatigue life of the structure to more than nine times that of mechanically fastened joints, surpassing the aircraft’s service life by over twofold. The inclusion of fasteners effectively arrested crack propagation, preventing catastrophic failure and improving overall durability. Visual inspections, strain gauges, and optical monitoring confirmed the bolts’ role in reducing Mode I opening and peeling stresses. These findings underscore the potential of hybrid joints to enhance the durability and safety of thick aircraft structures, leading to significant cost savings by reducing the frequency of repairs and downtime.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100567"},"PeriodicalIF":5.3,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 and rapid method of integrating sensors for SHM to thermoplastic composites through induction heating 一种通过感应加热将SHM传感器与热塑性复合材料集成的新型快速方法

IF 5.3

Composites Part C Open Access Pub Date : 2025-02-06 DOI: 10.1016/j.jcomc.2025.100568

Tasdeeq Sofi , Javier A. García , María R. Gude , Peter Wierach

{"title":"A novel and rapid method of integrating sensors for SHM to thermoplastic composites through induction heating","authors":"Tasdeeq Sofi , Javier A. García , María R. Gude , Peter Wierach","doi":"10.1016/j.jcomc.2025.100568","DOIUrl":"10.1016/j.jcomc.2025.100568","url":null,"abstract":"<div><div>A novel, rapid, and efficient method for bonding Piezoceramic transducers (PCTs) to high-performance thermoplastic composites using thermoplastic adhesive films (TPAFs) and induction heating is presented. The current state-of-the-art techniques to bond PCTs to composites using epoxy adhesives can take hours. This innovative out-of-oven or autoclave procedure drastically reduces bonding time to mere minutes, thereby significantly enhancing the process efficiency. Five different TPAFs were used to bond PCTs to carbon fiber polyether-ether-ketone (CF-PEEK) coupons. After determining the process window and analyzing the effects of power, coupling distance, and time on temperature, it was found that power has the greatest influence. A 20% increase in power can result in 50.9% increase in temperature as compared to time. Controlled heating and cooling ramps were developed based on the power-temperature correlation, and their effects were analyzed through differential scanning calorimetry tests. In the controlled case, the melting enthalpy of semi-crystalline TPAF increased by 4.2%, while the glass transition temperature of amorphous TPAF increased by 2.4% compared to non-controlled case. Following successful PCT bonding, mechanical performance was evaluated through static flexural and fatigue tests. TPAFs exhibited critical strains of 0.33%-0.71%, with some exceeding the critical strains of co-bonded or epoxy-bonded PCTs in previous studies by 0.13%. Microscopic analyses revealed the dominant failure mode at the composite-adhesive interface. During fatigue testing, three out of five TPAFs performed successfully, with the highest change in electro-mechanical susceptance spectra observed in amorphous TPAF equivalent to 1.87%. Overall, an efficient methodology is proposed, particularly beneficial for applications in structural health monitoring.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"17 ","pages":"Article 100568"},"PeriodicalIF":5.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Post-joining thermal characteristics and repair integrity of carbon fiber-reinforced thermoplastic composites during ultrasonic reconsolidation at 20 kHz 碳纤维增强热塑性复合材料在20 kHz超声再固结过程中的接合后热特性和修复完整性

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-30 DOI: 10.1016/j.jcomc.2025.100565

Balaji Ragupathi , Lena Burger , Frank Balle

引用次数: 0

Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering 选择性激光烧结制备自监测MWCNT/PA12细胞复合材料的单调和循环压缩性能

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-29 DOI: 10.1016/j.jcomc.2025.100566

Muhammad Umar Azam , S Kumar , Andreas Schiffer

{"title":"Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering","authors":"Muhammad Umar Azam , S Kumar , Andreas Schiffer","doi":"10.1016/j.jcomc.2025.100566","DOIUrl":"10.1016/j.jcomc.2025.100566","url":null,"abstract":"<div><div>Herein, we experimentally investigate the mechanical and piezoresistive properties of selectively laser-sintered cellular composites under monotonic and cyclic compressive loading. Hexagonal honeycomb structures (HHSs) with relative densities of 20 %, 30 %, and 40 % were 3D printed from a ball-milled nanocomposite powder of multi-walled carbon nanotubes (MWCNTs) and polyamide 12 (PA12) with 0.3 wt.% MWCNTs. The pure PA12 HHSs exhibited lower porosity and superior mechanical properties, including collapse strength, elastic modulus and energy absorption, particularly at higher relative densities (30 % and 40 %). Notably, the specific energy absorption for the PA12 HHSs reached 24 J g⁻¹, under out-of-plane compression at 40 % relative density. Compared to neat PA12, the MWCNT/PA12 HHSs showed a reduction in strength and modulus but demonstrated excellent energy absorption efficiency of up to 53 %. Moreover, MWCNT/PA12 HHSs exhibited exceptional strain-sensing capabilities in the elastic region with gauge factors of up to 25. Cyclic tests showed that the zero-load resistance increased significantly as damage progressed during the collapse phase, highlighting their potential for application in smart, lightweight structures with integrated strain and damage-sensing functionalities.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100566"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Basalt-silk fiber reinforced PLA composites: Effect of graphene fillers and stacking sequence 玄武岩-丝纤维增强PLA复合材料：石墨烯填料及堆积顺序的影响

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-27 DOI: 10.1016/j.jcomc.2025.100564

Hasibur R. Hamim , Tanzim Hasan , Farhan Shahriar , Sazidur Rahman Chowdhury , Md.Anisur Rahman , Mohammad Nasim , Mohammad Ahsan Habib

{"title":"Basalt-silk fiber reinforced PLA composites: Effect of graphene fillers and stacking sequence","authors":"Hasibur R. Hamim , Tanzim Hasan , Farhan Shahriar , Sazidur Rahman Chowdhury , Md.Anisur Rahman , Mohammad Nasim , Mohammad Ahsan Habib","doi":"10.1016/j.jcomc.2025.100564","DOIUrl":"10.1016/j.jcomc.2025.100564","url":null,"abstract":"<div><div>This study explores the development of biocompatible composites using strong basalt fibers and ductile silk fibers, and a polylactic acid (PLA) matrix. Five distinct stacking sequences were fabricated via a replicable hand layup and vacuum bagging technique, with alternating layer specimens (ALT) further enhanced by the addition of graphene nanoplatelets (GNPs) at 3, 6, and 9 wt.% of the PLA matrix. The composites were characterized for tensile, flexural, impact, and interlaminar shear strengths, damping properties, electrical conductivity, moisture absorption, and morphological features. The ALT configuration exhibited superior performance, with its multi-layered structure effectively mitigating delamination. ALT composites without GNPs achieved the highest tensile strength (136.54 MPa), tensile modulus (3.42 GPa), interlaminar shear strength (0.48 MPa), impact energy (36.84 kJ/m²), and flexural strength (18.06 MPa), predominantly failing via delamination. SEM analysis identified the basalt fiber-PLA interface as a critical failure site. The incorporation of 6 wt.% GNP enhanced damping by 1.54 times, but the composites remained nonconductive due to graphene agglomeration and lack of a conductive network. These energy-absorbing, environmentally sustainable composites show promise for multifaceted applications with reduced ecological impact.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100564"},"PeriodicalIF":5.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and characterization of the flexible three-layered thin film composites based on MXene/Fe3O4/MWCNT for electromagnetic shielding applications 电磁屏蔽用MXene/Fe3O4/MWCNT柔性三层薄膜复合材料的制备与表征

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-22 DOI: 10.1016/j.jcomc.2025.100562

Mariam Mansoori, Shaohong Luo, Daniel Choi

引用次数: 0

Flexural characteristics of additively manufactured continuous fiber-reinforced honeycomb sandwich structures 增材制造连续纤维增强蜂窝夹层结构的受弯特性

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-21 DOI: 10.1016/j.jcomc.2025.100563

Rafael Guerra Silva , Gustavo Morales Pavez

{"title":"Flexural characteristics of additively manufactured continuous fiber-reinforced honeycomb sandwich structures","authors":"Rafael Guerra Silva , Gustavo Morales Pavez","doi":"10.1016/j.jcomc.2025.100563","DOIUrl":"10.1016/j.jcomc.2025.100563","url":null,"abstract":"<div><div>Additive manufacturing of continuous fiber filament is an advanced process that combines continuous strands of reinforcing fibers with thermoplastic materials to create composite parts. Previous studies have explored the potential of this technology to produce solid composite materials, but its potential for the production of sandwich panels has been limited. For instance, continuous fiber can be used to reinforce the faces while lightweight customized lattice structures could be selected for the core, all built integrally in one single process. This study analyzes the effect of reinforcement material and fiber orientation on the flexural behavior of continuous fiber-reinforced sandwich structures built entirely using a commercially available fused filament fabrication printer. Three-point bending tests were carried out on sandwich panel specimens, which were built using nylon reinforced with chopped carbon fiber and two reinforcement fibers, glass or carbon fiber. The carbon fiber-reinforced sandwich panels had a higher rigidity than those reinforced with glass fiber, but carbon fiber showed significant scattering. Additionally, we explored the influence of fiber content on the flexural behavior of the composite sandwich panels. As predicted by the theoretical models, a higher fiber content led to higher values of flexural modulus and strength. The analytical models were able to predict the flexural modulus and critical load with a relative error of approximately 20 % for low fiber volume fraction in the facing. On the other hand, in carbon fiber-reinforced specimens, when doubling the fiber volume fraction in the facing, the relative error was above 60 %.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100563"},"PeriodicalIF":5.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the thickness and layup dependence on failure mechanisms during unfolding of curved woven composites 弯曲机织复合材料展开破坏机制对厚度和层积的影响

IF 5.3

Composites Part C Open Access Pub Date : 2025-01-21 DOI: 10.1016/j.jcomc.2025.100559

R.D.R. Sitohang, S. Benou, L.L. Warnet, R. Akkerman

{"title":"On the thickness and layup dependence on failure mechanisms during unfolding of curved woven composites","authors":"R.D.R. Sitohang, S. Benou, L.L. Warnet, R. Akkerman","doi":"10.1016/j.jcomc.2025.100559","DOIUrl":"10.1016/j.jcomc.2025.100559","url":null,"abstract":"<div><div>This study investigates the failure mechanisms of curved woven Glass/Polyphenylene sulfide (G/PPS) composites and characterizes the critical strains associated with the occurrence of damages during unfolding. Tensile-bending tests were carried out to study the damage development. The damages were observed by using acoustic emission sensors, a scanning electron microscope, and a camera. The results for the (0,90) ply orientation showed that the mechanism of failure changes from intraply-dominated to interply-dominated as the laminate thickness increases. Furthermore, the change in layup for the thinnest samples, with [(0,90)]<sub>2s</sub>, [(90,0)]<sub>2s</sub>, and [(<span><math><mo>±</mo></math></span>45)]<sub>2s</sub> layups, caused a change in the mode of the damage initiation, although all of them showed initiation at the fiber/matrix interfaces. Intra-yarn cracks were found at the compression side of all 4-ply samples. These cracks caused surface yarn buckling in the [(0,90)]<sub>2s</sub> and [(<span><math><mo>±</mo></math></span>45)]<sub>2s</sub> samples, but not in the [(90,0)]<sub>2s</sub>.</div></div>","PeriodicalId":34525,"journal":{"name":"Composites Part C Open Access","volume":"16 ","pages":"Article 100559"},"PeriodicalIF":5.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0