Composite Structures最新文献_第3页

Inverse design of compression-torsion mechanical metamaterials with suppressed Poisson effect under large deformation

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-24 DOI: 10.1016/j.compstruct.2025.119125

Jinhao Zhang , Xiao Zhou , Mi Xiao , Yu Jiang , Fengwen Wang , Xin Fang

{"title":"Inverse design of compression-torsion mechanical metamaterials with suppressed Poisson effect under large deformation","authors":"Jinhao Zhang , Xiao Zhou , Mi Xiao , Yu Jiang , Fengwen Wang , Xin Fang","doi":"10.1016/j.compstruct.2025.119125","DOIUrl":"10.1016/j.compstruct.2025.119125","url":null,"abstract":"<div><div>The intrinsic coupling of torsion (shear) properties with the Poisson effect is typical of the chiral materials subjected to compressive loads. Pure torsion functionalities with suppressed Poisson effect are of great interest for innovative actuators capable of switching displacement modes in confined or specialized assembly spaces. However, both the torsion property and Poisson effect may be dependent on the strain, which makes it challenging to design the constant torsion functionality with zero Poisson effect under large deformation. This study develops an inverse design method of a compression-torsion mechanical metamaterial with a suppressed Poisson effect. In the method, a nonlinear representative volume element model is built to characterize the coupling deformation behavior under large compression strain. Then, a topology optimization model is formulated to provide a high-dimensional design space, and it maintains high computational efficiency via the representative volume element model. Freeform microstructure topologies with tailored torsion functions and near-zero Poisson’s ratios are generated by this topology optimization formulation. The performance of the designed microstructures is validated at both the microscale and macroscale. Furthermore, experiments show the torsion angle of the metamaterial cylindrical shell is tunable via local confinement, overcoming the difficulty of reconstructing the metamaterial to change the torsion functionality.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119125"},"PeriodicalIF":6.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725891","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

Optimization of preloading process combining elastic interaction and creep relaxation for multi-constraint composite structures

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-23 DOI: 10.1016/j.compstruct.2025.119130

Chang Gao, Yujin Lin, Chenxuan Hu, Haidong Yu

{"title":"Optimization of preloading process combining elastic interaction and creep relaxation for multi-constraint composite structures","authors":"Chang Gao, Yujin Lin, Chenxuan Hu, Haidong Yu","doi":"10.1016/j.compstruct.2025.119130","DOIUrl":"10.1016/j.compstruct.2025.119130","url":null,"abstract":"<div><div>The preloading process of composite structure constrained by multiple bolted joints is difficult to be controlled because the elastic interaction between bolts and the creep relaxation of multi-layer viscoelastic structures exist simultaneously. In this paper, an optimization method of preload for multi-constraint composite structure is proposed by combining elastic interaction and long-term load relaxation. The composite structure is equivalent to the viscoelastic multi-layer structure and the load caused by creep relaxation for the multiple bolts is derived based on the viscoelastic constitutive model. The elastic interaction of bolts in relaxation process is considered and the interactive stiffness of multiple bolts is constructed. The iterative algorithm for the preload coupled with creep relaxation and elastic interaction is established. The attenuation behavior of the preload with different initial preloads and sequences for multi-constraint composite structure can be predicted. A data-driven surrogate model for the prediction of preload evolution is established, by which the variation of preload with different preloading processes can be calculated rapidly. Then, the magnitude and uniformity of preload are taken as the optimized objective and the optimal initial preloading parameters are solved, which is useful for the manufacturing of multi-constraint composite structures with long-term storage.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119130"},"PeriodicalIF":6.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697242","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

Investigation of temperature and structural configuration effects on the mechanical properties of CFRP bolted joints

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-23 DOI: 10.1016/j.compstruct.2025.119128

Xiaodong Liu, Kai Huang, Xiaojian Han, Jindi Zhou, Li Zhang, Licheng Guo

{"title":"Investigation of temperature and structural configuration effects on the mechanical properties of CFRP bolted joints","authors":"Xiaodong Liu, Kai Huang, Xiaojian Han, Jindi Zhou, Li Zhang, Licheng Guo","doi":"10.1016/j.compstruct.2025.119128","DOIUrl":"10.1016/j.compstruct.2025.119128","url":null,"abstract":"<div><div>Composite bolted joints are extensively employed in structural applications and have garnered notable interest in composite component design. This research examined how temperature, hole size, and washer configuration influence the composite bolted joint’s tensile properties, using 3D digital image correlation (DIC) and acoustic emission (AE) methods. The study analyzed load–displacement response, surface strain evolution, damage mode characterization, and damage initiation of joint throughout the tensile testing. The strain and displacement fields of the joint surfaces effectively revealed the competing evolution mechanisms between axial tensile effect and secondary bending effect. The k-means++ clustering algorithm and sentry function were employed to accurately identify damage modes and initiation in the joints. The results indicate that temperature, hole diameter, and washer configuration significantly influence joint strength, with the dominance of axial tensile effects and secondary bending effects varying depending on the load level. Double-sided washers delay damage initiation, while an increase in hole diameter causes damage to initiate earlier. High temperatures significantly delay the initiation of various damage modes.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119128"},"PeriodicalIF":6.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697241","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

Machine learning-based capacity model for CFST columns with damaged BFRP jackets

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-23 DOI: 10.1016/j.compstruct.2025.119120

Yirui Zhang , Chi Ren , Lingfei Qian , Yang Wei , Jie Liu , Guofen Li

{"title":"Machine learning-based capacity model for CFST columns with damaged BFRP jackets","authors":"Yirui Zhang , Chi Ren , Lingfei Qian , Yang Wei , Jie Liu , Guofen Li","doi":"10.1016/j.compstruct.2025.119120","DOIUrl":"10.1016/j.compstruct.2025.119120","url":null,"abstract":"<div><div>The use of concrete-filled steel tubular (CFST) columns reinforced with basalt fiber-reinforced polymer (BFRP) jackets is increasingly prevalent in construction engineering. However, BFRP jackets are prone to physical damage during joint design or maintenance, which can weaken their confinement effect on CFST columns. Consequently, the damage parameters of BFRP jackets are crucial for the reinforcement of CFST structures. In this study, past experimental data were validated using a finite element model (FEM). Building on this reliable FEM, a comprehensive database was created, consisting of 495 data points, encompassing various damage conditions such as direction, location, angle, and quantity. A method for normalizing different damage parameters was proposed to quantitatively describe their respective damage characteristics. With the exception of the circumferential slotting damage type, all other damage types resulted in a degradation of the strengthened stiffness. Six machine learning methods were then employed to establish the capacity model, where Random Forest (RF) and CatBoost significantly outperform linear models, with R<sup>2</sup> values exceeding 0.97. SHAP analysis reveals that the scale of vertical grooves and the regional damage coefficient are key factors influencing the prediction. The research can provide a theoretical basis for the design and maintenance of BFRP-CFST columns.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119120"},"PeriodicalIF":6.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697096","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

An analytical approach to predicting tensile pseudo-ductility and multi-stage failure process of multidirectional thin-ply CFRP laminates

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-23 DOI: 10.1016/j.compstruct.2025.119129

Chenlong Ruan , Bowen Gong , Huan Wang , Xiaoliang Lai , Baofa Cheng , Hua-Xin Peng

{"title":"An analytical approach to predicting tensile pseudo-ductility and multi-stage failure process of multidirectional thin-ply CFRP laminates","authors":"Chenlong Ruan , Bowen Gong , Huan Wang , Xiaoliang Lai , Baofa Cheng , Hua-Xin Peng","doi":"10.1016/j.compstruct.2025.119129","DOIUrl":"10.1016/j.compstruct.2025.119129","url":null,"abstract":"<div><div>This paper presents an analytical model for predicting the nonlinear tensile response and progressive failure modes of multidirectional laminates. The proposed method extends the unidirectional pseudo-ductility model to multidirectional laminates and captures the complete failure process by taking accounts of various failure modes, including fiber breakage, matrix transverse failure, free-edge delamination, and potential intermediate layer fragmentation and delamination. Combining the matrix nonlinearity with fiber fracture and delamination in the intermediate layer, the [±<em>θ<sub>n</sub></em>/0°<em><sub>m</sub></em>/±<em>θ<sub>n</sub></em>] configuration theoretically exhibits the highest uniaxial tensile pseudo-ductility, which is influenced by factors such as ply thickness, ply angle, and proportion of plies. Tensile testing on specimens with various thin-ply [±<em>θ<sub>n</sub></em>/0°<sub>2</sub>/±<em>θ<sub>n</sub></em>] configurations were conducted to validate the accuracy of the prediction model. The results showed a good agreement in the stress–strain responses. Furthermore, the [±30°<sub>6</sub>/0°<sub>2</sub>/±30°<sub>6</sub>] configuration exhibited intermediate ply fragmentation with a pseudo-ductile strain of 4.04 %, while other configurations with higher 0° ply proportions experienced catastrophic delamination or fracture. The Digital Image Correlation (DIC) results illustrated the strain evolution process, showing progressive delamination for the [±30°<sub>6</sub>/0°<sub>2</sub>/±30°<sub>6</sub>] configuration and catastrophic delamination for the [±30°<sub>4</sub>/0°<sub>2</sub>/±30°<sub>4</sub>] configuration. The analytical approach offers a straightforward method for capturing failure modes and stress–strain responses, facilitating pseudo-ductility design in multidirectional laminates.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119129"},"PeriodicalIF":6.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697240","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

Optimization of assembly parameters for composite bolted joints aiming at time-varying bearing reliability improvement

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-22 DOI: 10.1016/j.compstruct.2025.119113

Qingyuan Lin , Yong Zhao , Yuming Liu , Wei Pan , Yu Ren , Wencai Yu

{"title":"Optimization of assembly parameters for composite bolted joints aiming at time-varying bearing reliability improvement","authors":"Qingyuan Lin , Yong Zhao , Yuming Liu , Wei Pan , Yu Ren , Wencai Yu","doi":"10.1016/j.compstruct.2025.119113","DOIUrl":"10.1016/j.compstruct.2025.119113","url":null,"abstract":"<div><div>Bolted connections are a common assembly form for composite structures. Different assembly parameters may lead to multiply differences in the strength of composite bolted joints. Low structural reliability is currently a key bottleneck that restricts the performance improvement of composite devices. In this study, the uncertainty characteristics of the washer structure parameters, interface friction coefficients and tightening process parameters under different machining methods, interface treatments and tightening control methods are analyzed through batch experimental tests. Then the data set with assembly parameters as input and structural bearing limit as output is constructed through batch virtual tightening- tensile experiments. The data-driven algorithm is used to construct a fast prediction model of the bearing limit, and the time-varying uncertainty analysis of the bearing limit and the bearing reliability evaluation method are established. Finally, the method is used to realize the bearing reliability improvement by regulating the uncertainty to optimize the assembly parameters. The uncertainties in the assembly parameters of the composite bolted joints obtained through experimental tests in this study can provide a reference for related researches. The established data-driven fast prediction model of bearing limits provides an effective tool for statistical analysis of bearing limits and bearing reliability assessment.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119113"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714392","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

In-depth tool wear analysis in drilling of CFRP-Ti stacks by DLC coated drills

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-22 DOI: 10.1016/j.compstruct.2025.119110

Sharjeel Ahmed Khan , Raphaël Royer , Marta Saraiva , Nazanin Emami , Amilcar Ramalho

{"title":"In-depth tool wear analysis in drilling of CFRP-Ti stacks by DLC coated drills","authors":"Sharjeel Ahmed Khan , Raphaël Royer , Marta Saraiva , Nazanin Emami , Amilcar Ramalho","doi":"10.1016/j.compstruct.2025.119110","DOIUrl":"10.1016/j.compstruct.2025.119110","url":null,"abstract":"<div><div>Spurred by the growing trend towards sustainability and use of green material alternatives, Carbon Fiber Reinforced Polymer paired with Titanium alloys (CFRP-Ti stacks) are employed in aerospace industry for their high strength-to-weight ratio and good galvanic corrosion resistance. However, production of holes for bolt or rivet connections, imperative for components assembly depicts unmatched difficulties in their machinability due to superior mechanical characteristics and distinct nature of stack components, causing rapid tool wear and compromised hole quality. In this work, in-depth tool wear analysis of Diamond-like-Carbon (DLC) coated drills were analysed periodically to evaluate tool wear growth and associated wear mechanism while drilling of CFRP-Ti stacks. Qualitative analysis was performed after drilling set number of holes by two DLC coated drills (DLC-Ar and DLC-Bn), and results compared with uncoated solid carbide (WC) drills tested under similar dry machining conditions. The wear progress was observed by SEM and EDX; and for extensive wear mechanism investigation, Focused Ion Beam (FIB) cross-sections were analysed. Moreover, morphological examination of etched drills after drilling experiment was performed to observe active cutting regions for overall damage extent, gain insight about coating reminiscences and underlying wear mechanism. The results demonstrate that DLC-Bn drill showed best performance with reduced thrust forces and torque, reduced wear of cutting edges and no fracture/chipping of drill corner compared to DLC-Ar and WC drill. Although, DLC-Ar drill does alleviate corner chipping but suffer premature coating failure, undergoes intense tribo-chemical wear, excessive removal of carbide grains and generation of highest thrust forces compared to WC drill.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119110"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725892","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 new bionic lattice structure design and compressive mechanical properties based on the beetle elytra

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-22 DOI: 10.1016/j.compstruct.2025.119117

Zhixuan Sun , Yu Gong , Kun Chen , Hao Liu , Jianyu Zhang , Libin Zhao , Ning Hu

{"title":"A new bionic lattice structure design and compressive mechanical properties based on the beetle elytra","authors":"Zhixuan Sun , Yu Gong , Kun Chen , Hao Liu , Jianyu Zhang , Libin Zhao , Ning Hu","doi":"10.1016/j.compstruct.2025.119117","DOIUrl":"10.1016/j.compstruct.2025.119117","url":null,"abstract":"<div><div>To meet the demand for lightweight and high-strength materials in engineering applications, this research draws inspiration from the microscopic support structure of the beetle’s elytra. A novel hourglass-shaped lattice (HSL), based on biomimetic principles, was designed by extracting and transforming the hollow strut features of the beetle’s elytra. Nylon PA2200 was chosen as the matrix material for the specimen, which was fabricated using additive manufacturing and then subjected to a quasi-static compression test. The experimental results showed that the standard HSL structure (HSL-2S) possessing two connecting rods had a maximum increase in elastic modulus by 54.89 %, yield strength by 128.99 %, and compressive strength by 218.08 % as compared to the Circle, Square, and Square-incline thin-walled structures. Additionally, this research provided an in-depth analysis of the influence of design parameters, including the number of rods and the thickness of the shell, on structural performance using the method of controlled variables. The results showed that a reasonable arrangement of rods most effectively improves the mechanical performance of the structure. The research findings offered valuable design references for the development of lattice structures with excellent mechanical properties and efficient energy absorption.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119117"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714341","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

Enhanced impregnation behavior and interfacial bonding of CF/PEEK composites by regulating molecular weight of poly (aryl ether ketone) interfacial binder

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-22 DOI: 10.1016/j.compstruct.2025.119107

Jinze Cui , Xiyan Li , Yutai Luo, Simin Zhang, Feng Bao, Jiali Yu, Huichao Liu, Caizhen Zhu, Jian Xu

{"title":"Enhanced impregnation behavior and interfacial bonding of CF/PEEK composites by regulating molecular weight of poly (aryl ether ketone) interfacial binder","authors":"Jinze Cui , Xiyan Li , Yutai Luo, Simin Zhang, Feng Bao, Jiali Yu, Huichao Liu, Caizhen Zhu, Jian Xu","doi":"10.1016/j.compstruct.2025.119107","DOIUrl":"10.1016/j.compstruct.2025.119107","url":null,"abstract":"<div><div>The primary obstacle to enhancing the mechanical performance of CF/PEEK composites is the insufficient interfacial bonding strength and poor impregnation properties. The present study addresses this issue by focusing on the development of a highly heat-resistant and easily soluble poly (aryl ether ketone) (PFEEK) interfacial binder as well as a processing technology for chopped ultra-thin CF tapes. As a result, the CF/PEEK-2 composites (<em>Mw</em>: 12000 g/mol) exhibited optimal mechanical performance with interlaminar shear strength (ILSS), tensile strength, tensile modulus, tensile toughness, flexural strength, and flexural modulus of 86.0 MPa, 772.9 MPa, 50.2 GPa, 13.5 MJ/m<sup>3</sup>, 878.5 MPa, and 47.8 GPa, respectively, which can be attributed to the excellent impregnation properties and wettability of the CF bundles and PEEK matrix. Therefore, a heat-resistant (<em>T<sub>g</sub></em> > 250°C; <em>T<sub>d5%</sub></em> > 485°C) and diffluent PFEEK binder will provide crucial guidance for further large-scale applications of high-end CF/PEEK composites.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"362 ","pages":"Article 119107"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683616","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

Macro-Micro structure engineering for reed-derived biochar composites to achieve synergetic dissipation capacities towards wide-band and strong electromagnetic wave absorption 芦苇生物炭复合材料的宏观-微观结构工程，实现宽带强电磁波吸收的协同消散能力

IF 6.3 2区材料科学

Composite Structures Pub Date : 2025-03-22 DOI: 10.1016/j.compstruct.2025.119116

Yunpeng Ye, Xia Zheng, Chengliang Zhou, Xingong Li

{"title":"Macro-Micro structure engineering for reed-derived biochar composites to achieve synergetic dissipation capacities towards wide-band and strong electromagnetic wave absorption","authors":"Yunpeng Ye, Xia Zheng, Chengliang Zhou, Xingong Li","doi":"10.1016/j.compstruct.2025.119116","DOIUrl":"10.1016/j.compstruct.2025.119116","url":null,"abstract":"<div><div>Achieving integration of strong electromagnetic wave (EMW) absorption and wide absorption bandwidth through a single-component carbonaceous absorber is still considered a huge challenge due to the impedance mismatch and limited loss mechanisms. Herein, a reed-derived carbon/epoxy (RC/EP) composite absorber with ultra-wide absorption bandwidth and highly strong EMW absorption was fabricated by simultaneous regulation on the micro-structure of RC and establishment of macro-gradient of RC in EP matrix. The compartmentalized structure and gradient distribution of the optimized RC in the EP matrix boosted the reflection and scattering of the EMW, contributing outstanding impedance matching and synergetic EMW dissipation. Therefore, the RC/EP composite with the thickness of 2.0 mm presented a minimum reflection loss (RL<sub>min</sub>) of −54.3 dB and an effective absorption bandwidth (EAB) of 6.12 GHz. Varying the content and distribution of RC, the EAB of the RC/EP can cover 99.7 % of the whole Ku band. In addition, the stealth performance of RC/EP absorbing materials under actual far-field conditions is confirmed using Computer Simulation Technology (CST). This work provides a new way to realize a single-component carbonaceous absorber with both broadband and strong EMW absorbing capability, which can satisfy a wide range of applications in the fields of electronics, medical protection, and architectural invisible materials.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"363 ","pages":"Article 119116"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697469","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