Composites Part A: Applied Science and Manufacturing最新文献

{"title":"Revealing the failure modes of Z-pins with varying pre-curing degrees and their influence on CFRPs","authors":"Yuzhong Ge,&nbsp;Bowen Gong,&nbsp;Suyan Wu,&nbsp;Huan Wang,&nbsp;Wenting Ouyang,&nbsp;Hua-Xin Peng","doi":"10.1016/j.compositesa.2025.109072","DOIUrl":"10.1016/j.compositesa.2025.109072","url":null,"abstract":"<div><div>Z-pinning is an effective technique to improve the resistance of delamination crack growth in CFRP (Carbon Fiber Reinforced Polymers) laminates. The interfacial strength between Z-pin and laminates is a critical factor affecting the bridging behavior. The active functional groups on the surface of partially cured Z-pins could facilitate the co-curing interfacial bonding. In this work, Z-pin with various pre-curing degrees (1, 0.8, 0.6, 0.4) was fabricated through fitting the cure kinetics equations. The constitutive laws of partially cured Z-pin were obtained through the multiple mode bridging tests. The results indicate that decreasing pre-curing degrees enhances the Z-pin/laminate interfacial strength. The failure modes varied from the debonding at the Z-pin/CFRPs interface for fully cured Z-pins to the internal Z-pin splitting and/or the fracture in the resin-rich area for partially cured ones, resulting in a decrease in bridging traction energy. By appropriately adjusting the cure degree of Z-pins, the interlaminar fracture toughness of Z-pinned CFRPs was improved with the G_Ic increased by 307%-631%. Additionally, the secondary curing effect of Z-pins revealed that the resin accumulation within Z-pins with a too low pre-curing degree led to significant deviations and non-linear tensile behaviour of Z-pins, and it is important to ensure an initial cure degree that surpasses the gel point.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109072"},"PeriodicalIF":8.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195066","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}

{"title":"A deep learning-assisted inverse design framework for nacre-like composites with excellent specific damping performance","authors":"Yibo Gao ,&nbsp;Linghua Xiao ,&nbsp;Yan Li ,&nbsp;Ke Duan ,&nbsp;Yonglyu He ,&nbsp;Li Li","doi":"10.1016/j.compositesa.2025.109050","DOIUrl":"10.1016/j.compositesa.2025.109050","url":null,"abstract":"<div><div>Achieving stiffness and damping are key requirements for total mechanical energy loss, and unfortunately, these two properties are often mutually exclusive. Nacre-like composites have been experimentally proven to have both high modulus and high damping, however, there is still a lack of design tools to generate new nacreous microstructures that meet the desired requirement of specific damping performance. In this paper, we propose a deep learning-assisted inverse design framework, called the Denoising Diffusion Probabilistic Model with Frequency-aware feature Fusion and External Attention module (DDPM-FFEA), to generate new nacreous microstructures meeting excellent specific damping performance. The frequency-aware feature fusion and external attention module are integrated into DDPM to provide more accurate spatial boundary features and a larger structural design domain, making the DDPM-FFEA framework suitable for designing nacreous composites with clear feature consistency and boundary definition within a limited design domain. The DDPM-FFEA inverse model is trained to highlight nacreous composites with counterintuitive asymmetric microstructures by specifying ultrahigh specific damping property. By studying various asymmetric microstructures, the ultra-high specific damping performance is attributed to the tensile-bending coupling effect. Microstructural asymmetry becomes a key morphological feature in damping materials, which may explain why asymmetry-induced gradient materials are widely present in natural materials.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109050"},"PeriodicalIF":8.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190495","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}

{"title":"A heat-transfer-inhibition strategy without compromising strengths for nanoporous phenolic composites: Designing hybrid carbon cloth/quartz felt needle-punched fabrics","authors":"Yaolan Li ,&nbsp;Bo Niu ,&nbsp;Hongxiang Cai ,&nbsp;Xuanfeng Zhang ,&nbsp;Xiaofei Zhu ,&nbsp;Yu Cao ,&nbsp;Yayun Zhang ,&nbsp;Donghui Long","doi":"10.1016/j.compositesa.2025.109071","DOIUrl":"10.1016/j.compositesa.2025.109071","url":null,"abstract":"<div><div>Phenolic-based composites have great application prospects in the field of ablative thermal protection materials, but the optimization of their thermal insulation performance is generally at the expense of mechanical properties. Herein, an innovative strategy is proposed to improve thermal insulation without compromising strengths by reinforcing nanoporous phenolic with hybrid carbon cloth/quartz felt needle-punched fabrics. By moderately replacing carbon felt in the needle-punched carbon fabrics with quartz felt possessing lower thermal conductivity, the thermal conductivity of composites is effectively reduced from 0.24 W/m⋅K to 0.18 W/m⋅K. More interestingly, the high strength of composites can be maintained (285.6 ± 4.7 MPa under tensile, 289.0 ± 12.4 MPa under compression). Finite element analysis of heat transfer verifies that fiber felt is the main unit of inhibiting thermal conduction through thickness direction, highlighting the significant contribution of quartz felt to the improvement of thermal insulation. The in-situ micro-CT tests use CT imaging to capture the evolution of the internal microstructure of composites under tensile loading, which reveal that the fracture of composites coincides with the breakage of carbon cloths, underscoring the crucial role of carbon cloths in maintaining mechanical properties. Compared with traditional dense carbon/phenolic composites, composites in this work exhibit 21.0 % lower density, 75.3 % lower thermal conductivity, 101.3 % higher tensile strength and modified ablative properties. This study will promote the structural optimization of phenolic-based composite and its application in extremely thermo-mechanical coupling environments.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109071"},"PeriodicalIF":8.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185088","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}

{"title":"Bioinspired coral-like FeC/C nanofibers networks for enhanced microwave absorption and multifunctional protection properties of polyurea coatings","authors":"Jinhu Hu ,&nbsp;Jialin Jiang ,&nbsp;Qianlong Li ,&nbsp;Jin Cao ,&nbsp;Xiuhong Sun ,&nbsp;Siqi Huo ,&nbsp;Zhaolu Qin ,&nbsp;Ye-Tang Pan","doi":"10.1016/j.compositesa.2025.109068","DOIUrl":"10.1016/j.compositesa.2025.109068","url":null,"abstract":"<div><div>With the rapid development of electronic communication technology, the issue of electromagnetic pollution has become increasingly prominent. Developing multifunctional protective materials that combine efficient electromagnetic microwave (EMW) absorption with environmental durability is of great significance. Inspired by the multi-branched structure of coral, this study successfully fabricated FeC/C nanofiber EMW absorbers with a coral-like network structure through electrospinning and carbonization processes and applied them to polyurea (PUA) coatings. The microstructure, electromagnetic parameters, and performance modulation mechanisms of the materials were systematically investigated. The results indicate that the bioinspired coral-like network structure optimizes multiple scattering paths of EMW and impedance matching characteristics, enabling FeC/C nanofibers to exhibit excellent EMW absorption performance, with a minimum reflection loss (RL_min) of −67.24 dB at a thickness of 1.82 mm and an effective absorption bandwidth (EAB) of 5.24 GHz. When applied to PUA coatings, this structure not only significantly enhances the EMW absorption performance of the composites (with P-30 exhibiting a RL_min of −62.67 dB at 2.0 mm and an EAB of 6.22 GHz), but also imparts hydrophobic properties to the P-40 sample by constructing a micro/nano-scale rough surface. Meanwhile, the mechanical properties are notably improved, with the tensile strength of P-40 reaching 23.04 MPa and the tear strength of P-20 reaching 41.73 MPa. This study provides new design insights and technical references for the development of novel bioinspired multifunctional coating materials that integrate electromagnetic protection, environmental durability, and mechanical strength.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109068"},"PeriodicalIF":8.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190496","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}

{"title":"Improved performance of structural battery composites through carbon fiber electrode/current collector integration","authors":"Lei Tian,&nbsp;Xiaolong Ji,&nbsp;Lin Zhao,&nbsp;Qin Lei,&nbsp;Jinrui Ye","doi":"10.1016/j.compositesa.2025.109065","DOIUrl":"10.1016/j.compositesa.2025.109065","url":null,"abstract":"<div><div>Carbon fibers (CF) reinforced structural battery composites (SBCs) using single CF current collectors (SCF) are proposed to enhance mechanical and electrochemical properties over traditional metal/CF assembly current collectors (M/CF). This study fabricates SBCs using LiFePO₄ (LFP)-coated CF fabric as the cathode, graphite-coated CF fabric as the anode, and a porous resin soaked with liquid electrolyte as the structural electrolyte. SCF-SBCs exhibit an initial specific capacity of 122.0 mAh/g_LFP (43.6 mAh/g_electrode) at 0.3C, which is 52.3 % higher than that of the M/CF-SBCs, with an initial energy density of 10.0 Wh/kg.<!--> <!-->After 100 cycles, SCF-SBCs maintain 91.9 % of their capacity, in contrast to 72.5 % for MCF-SBCs. Furthermore, SCF-SBCs demonstrate superior tensile and flexural strengths of 221.8 MPa and 119.8 MPa, respectively, which are 127.0 % and 59.3 % higher than those of MCF-SBCs. Overall, the notable benefits of SCF-SBCs in electrochemical and mechanical aspects are confirmed.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109065"},"PeriodicalIF":8.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178107","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}

{"title":"Sub-microstructure restoration, surface activation, and interface enhancement of polyimide fibers via multifunctional epoxy/acetone sizing method","authors":"Hongjie Xu ,&nbsp;Yi Yao ,&nbsp;Yuelin Jin ,&nbsp;Jiayu Zhan ,&nbsp;Zheng Zhao ,&nbsp;Shengli Qi ,&nbsp;Guofeng Tian ,&nbsp;Dezhen Wu","doi":"10.1016/j.compositesa.2025.109064","DOIUrl":"10.1016/j.compositesa.2025.109064","url":null,"abstract":"<div><div>With the development of high-performance organic fiber reinforced composites, challenges related to fiber microstructural defects and surface inertness have attracted increasing attention. To address these issues, this study proposes effective and commercially viable strategies for restoring sub-microstructures and activating fiber surfaces. Through the synergistic effect of acetone and epoxy, the epoxy not only adsorbed onto and activated the fiber surface but also deeply penetrated into the fibers, thereby restoring the fibril-void structure. The multifunctional epoxy significantly improved the structural and interfacial strength, leading to significant improvements in the tensile and compressive strength of the monofilament, with increases of 15 % and 59 %, respectively. Upon preparation into a composite, the interfacial shear and compressive strength were enhanced by 75 % and 53 %, respectively. Furthermore, molecular dynamics simulations revealed that the interfacial enhancement mechanism is closely associated with the increased interfacial energy and thickness, as well as the enhanced reactivity of the epoxy.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109064"},"PeriodicalIF":8.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178108","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}

{"title":"Effect of local meso-structure on mechanical variability and notch strength sensitivity in woven glass fiber polyamide composites","authors":"Mohammad Nazmus Saquib ,&nbsp;Edwing Chaparro-Chavez ,&nbsp;Siavash Sattar ,&nbsp;Diego Pedrazzoli ,&nbsp;Mingfu Zhang ,&nbsp;Sergii G. Kravchenko ,&nbsp;Oleksandr G. Kravchenko","doi":"10.1016/j.compositesa.2025.109061","DOIUrl":"10.1016/j.compositesa.2025.109061","url":null,"abstract":"<div><div>This study investigated the variability in mechanical behavior and notch sensitivity of nylon/glass fiber woven organosheets, offering vital insights for woven thermoplastic composite material design. Combining experimental analyses and advanced computational modeling through the continuum damage mechanics (CDM) model, the study examines the tensile properties and failure mechanisms of the 2/2 twill woven organosheet. The CDM model accurately predicts unnotched tensile behavior, identifying key damage modes. Additionally, the study explores the hole size effect in open hole tension (OHT) configurations, utilizing both experimental and CDM results to calibrate the analytical modified point stress criterion (MPSC) model. The analytical notch sensitivity curves derived from both experimental and computational methods closely align, demonstrating the viability of virtual testing for OHT characterization. Furthermore, the research investigates the effect of local <em>meso</em>-structure of 2/2 twill weave on strength variability.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109061"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205106","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}

{"title":"Prediction of transverse tensile strength of in-situ-consolidated Carbon/PEEK thermoplastic composite material based on micromechanical modeling and simulation","authors":"Emad Pourahmadi ,&nbsp;Farjad Shadmehri ,&nbsp;Rajamohan Ganesan","doi":"10.1016/j.compositesa.2025.109062","DOIUrl":"10.1016/j.compositesa.2025.109062","url":null,"abstract":"<div><div>Thermoplastic composite laminates have emerged as a compelling alternative to thermoset laminates for primary aerospace applications, following the industrial development of automated manufacturing technologies, such as the Automated Fiber Placement (AFP) process. The present research aims to predict the transverse tensile strength of in-situ-consolidated Carbon/PEEK thermoplastic composite material, considering inherent variations caused by the AFP process in fiber volume fraction, void content, interlaminar resin pocket and degree of crystallinity. To achieve this, two-dimensional Representative Volume Elements (RVEs) with randomly distributed fibers were developed at the micro-scale level. The Drucker-Prager model, combined with a ductile failure criterion, was used to capture the plastic behavior and damage accumulation in the PEEK resin during the numerical analysis. In order to acquire the necessary data for micromechanical modeling and analysis, two sets of specimens, manufactured using AFP in-situ consolidation and autoclave re-consolidation techniques, underwent micrographic examination and thermoanalytical Differential Scanning Calorimetry (DSC) analysis. The results reveal that AFP in-situ consolidation can reduce the transverse tensile strength of Carbon/PEEK thermoplastic composite material up to approximately 44%, compared to the autoclave re-consolidation technique. Due to the lack of experimental data caused by warpage occurring in the manufactured laminate in the absence of a heated mandrel, the present work proposes a simulation methodology to predict the transverse tensile strength resulting from the in-situ consolidation process. This crucial difference in strength values, most notably in the transverse direction, must be carefully considered in finite element analyses, analytical evaluations, and design procedures involving AFP-manufactured thermoplastic composite laminates and structures.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"197 ","pages":"Article 109062"},"PeriodicalIF":8.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170253","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}

{"title":"Innovative 2D material enhanced 3D-printed sandwich lattice sheet-embedded composites: Advancements in transient energy absorption characteristics","authors":"J Jefferson Andrew ,&nbsp;Muhammad Y Khalid ,&nbsp;Wesley J Cantwell ,&nbsp;Kamran A Khan ,&nbsp;Prasad Potluri ,&nbsp;Rehan Umer","doi":"10.1016/j.compositesa.2025.109057","DOIUrl":"10.1016/j.compositesa.2025.109057","url":null,"abstract":"<div><div>This research investigates a novel 3D-printed sandwich lattice sheet-embedded composite laminate designed for enhanced impact resistance. Additive manufacturing parameters have been established for two corrugated, nanoengineered sandwich lattice sheet geometries: triangular and curved topologies—in addition to reference bulk structures. Nanocomposite sandwich lattice sheets with varying Graphene Nano Platelet (GNP) concentrations (0–0.5 wt%) have been manufactured and integrated into glass fiber-reinforced laminates using co-infusion and co-curing techniques. This innovative approach enables seamless integration of 3D-printed, nanoengineered lattice sheets, preserving in-plane properties while localizing GNP reinforcement for enhanced energy absorption and offering a scalable, industrially compatible toughening strategy. The investigation involved analyzing the molecular composition, microstructure, and bulk properties of the constituent materials used in the lattice sheet fabrication, before subjecting the lattice sheet-integrated laminates to drop-weight impact loading. The laminates exhibited an excellent improvement in impact resistance, showing up to a ∼ 170 % increase in initial collapse load compared to baseline samples. These sandwich lattice structures effectively reduced damage propagation and displayed superior energy absorbing characteristics, notably in the case of the triangular sandwich lattice-embedded laminates. The study highlights the potential of triangular sandwich lattice sheet-embedded laminates, specifically those with optimized GNP concentrations, for applications requiring an enhanced impact resistance.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"197 ","pages":"Article 109057"},"PeriodicalIF":8.1,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170252","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}

{"title":"Influence of irradiation with synchrotron radiation X-ray on Nano-Scale CT for carbon fibers and epoxy matrix","authors":"Kosuke Takahashi ,&nbsp;Takuma Matsuo ,&nbsp;Katsuma Wakabayashi ,&nbsp;Akihisa Takeuchi ,&nbsp;Masayuki Uesugi ,&nbsp;Kentaro Uesugi ,&nbsp;Takashi Nakamura","doi":"10.1016/j.compositesa.2025.109060","DOIUrl":"10.1016/j.compositesa.2025.109060","url":null,"abstract":"<div><div>High magnification imaging using synchrotron radiation (SR) X-ray computed tomography (CT), known as “nano-CT,” has attracted attention owing to its spatial resolution of 100 nm, which is sufficient to visualize individual carbon fibers and interfacial cracks along them. However, repeated CT scanning degrades the mechanical properties of the matrix resin due to X-ray irradiation. In this study, SR X-ray CT was repeatedly performed on a single carbon fiber or a bundle of carbon fibers embedded transversely to the loading direction in dumbbell-shaped epoxy samples. The energy of the SR X-rays was varied to investigate their influence on crack propagation behavior along the carbon fibers under cyclic loading. Interfacial cracks along the carbon fibers propagated toward the surrounding epoxy matrix at an X-ray energy of 20 keV. By contrast, no matrix cracking was observed, and only interfacial cracks along the carbon fibers were present at an X-ray energy of 30 keV. These results were validated by tensile testing of CT-scanned samples. The sample exposed to 30 keV X-rays exhibited a stress–strain relationship similar to that of the unscanned sample, whereas the sample exposed to 20 keV X-rays fractured at a lower stress. Therefore, the irradiation damage of a typical epoxy matrix can be sufficiently suppressed using X-rays of at least 30 keV for repeated nano-CT scans.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"198 ","pages":"Article 109060"},"PeriodicalIF":8.1,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185020","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}