Journal of Manufacturing Processes最新文献

{"title":"Interfacial bonding mechanisms in laser welding of 2024 Al alloy and continuous CFR-PEEK via adjustable ring-mode laser beam","authors":"Hua Liu ,&nbsp;Huaxia Zhao ,&nbsp;Yafeng Zhao ,&nbsp;Yuanjie Peng ,&nbsp;Mengjia Xu ,&nbsp;Xiuhua Chen","doi":"10.1016/j.jmapro.2025.09.020","DOIUrl":"10.1016/j.jmapro.2025.09.020","url":null,"abstract":"<div><div>Continuous carbon-fiber-reinforced polyether-ether-ketone (CFR-PEEK)/aluminum (Al) alloy heterogeneous composite joint provides a promising integration of the excellent properties of CFR-PEEK and Al alloy, and laser welding technology serves as a critical method for joining CFR-PEEK and Al alloy, offering advantages in high accuracy and efficiency. However, the inherent differences in physical and chemical properties of dissimilar materials and unclear welding mechanism limit its use in fabricating CFR-PEEK/Al alloy composite joints, and the high energy density of laser and the heat sensitivity of thermoplastic materials significantly leads to thermal risk of the joining of CFR-PEEK/Al alloy. Therefore, this work firstly established a direct joining of CFR-PEEK with Al alloy in an argon atmosphere, and further investigate interfacial bonding mechanism of various crystal planes of non-oxidized Al alloys and CFR-PEEK by interface adsorption model constructed through density functional theory (DFT) simulation, and firstly using the combined method of molecular dynamics (MD) simulation and finite element (FE) simulation to explore the interface dynamic behaviors and suitable interface temperature of CFR-PEEK and Al alloy. Furthermore, this study firstly introduced an adjustable-ring-mode (ARM) laser beam with an adjustable core/ring power ratio to optimize the heat input during welding of CFR-PEEK and high-strength 2024 Al alloy. Results indicated that PEEK could form covalent bonds with Al (111), (001), and (110) crystal planes, involving strong orbital hybridization between Al 3p and O 2p orbitals and electron transfer from Al atoms to electronegative O atoms. Furthermore, the thermal effects could be significant and precise influenced by the ARM laser beam, During the adsorption stage, the interaction energy increased most rapidly at 750 K. Guided by FE simulations, a 750 K interface temperature was selected for CFR-PEEK/2024 Al hybrid joints, and experiments demonstrated superior tensile shear strength, confirming the effectiveness of the optimized parameters and the reliability of the combined simulation-experimental approach. These findings elucidate the bonding characteristics and mechanisms of CFRTP/Al alloy joints, providing a theoretical framework for optimizing the welding process of CFR-PEEK and Al alloy.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 757-773"},"PeriodicalIF":6.8,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical simulation of temperature distribution in selective laser melting using combined doublet and point solutions for a moving disk heat source","authors":"Zhazira Berkinova,&nbsp;Vsevolod Andreev,&nbsp;Boris Golman","doi":"10.1016/j.jmapro.2025.09.006","DOIUrl":"10.1016/j.jmapro.2025.09.006","url":null,"abstract":"<div><div>This study presents a novel analytical model for simulating the selective laser melting (SLM) process. It integrates point and doublet moving disk-shaped heat sources to accurately resolve heat transfer dynamics between the laser beam and the near-surface layer of the powder bed. The model incorporates conductive heat losses within the powder bed, radiative and convective exchange with the surrounding gas, and evaluates the Marangoni force profile. This comprehensive approach enables computationally efficient predictions of melt pool temperature distribution and dimensions. Validation of the model against numerical data showed excellent predictive accuracy, with over 99 % agreement for the peak temperature at the top surface of the AlSi10Mg powder bed. When validated against experimental data, the model's reliability was further confirmed, yielding melt pool width and depth accuracies of 94.6 % and 88.1 % for AlSi10Mg, and 94.5 % and 85.3 % for Inconel 625, respectively. Parametric studies revealed that increasing the laser power from 150 W to 200 W significantly enlarged the AlSi10Mg melt pool, with the maximum depth rising from 22 μm to 32 μm. At 200 W and 800 mm/s, full powder bed penetration occurred, extending into the solidified layer. Conversely, slower scan speeds amplified Marangoni forces due to prolonged thermal exposure. By elucidating key process-physics relationships, this work provides a foundation for optimizing SLM parameters to enhance additive manufacturing outcomes.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 693-702"},"PeriodicalIF":6.8,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physics-based analytical modeling of materials properties in metal additive manufacturing","authors":"Wei Huang ,&nbsp;Ruoqi Gao ,&nbsp;Hamid Garmestani ,&nbsp;Steven Y. Liang","doi":"10.1016/j.jmapro.2025.09.019","DOIUrl":"10.1016/j.jmapro.2025.09.019","url":null,"abstract":"<div><div>Emerging additive manufacturing (AM) offers a sustainable alternative to the subtractive processes with significant potential for complex geometries and material efficiency. However, predicting and controlling the microstructure-dependent properties of AM parts, particularly metals, remains challenging due to complex multi-physical processes. This work develops a physics-based analytical modeling framework to predict the evolution of key microstructural features (texture and grain size) and their influence on material properties (elastic modulus, Poisson’s ratio, yield strength) in laser powder bed fusion (LPBF) of Ti-6Al-4V. The framework integrates: (1) a 3D thermal profile model with boundary heat transfer for a moving point heat source; (2) Johnson–Mehl–Avrami–Kolmogorov (JMAK) kinetics and Green’s function-based thermal stress analysis for grain size prediction during heating and cooling; (3) columnar-to-equiaxed transition (CET) criteria and Bunge calculation for multi-phase texture evolution; (4) a self-consistent model to predict texture-affected anisotropic elastic modulus and Poisson’s ratio; and (5) the Hall–Petch relation for grain size-dependent yield strength. Experimental validations confirm the fidelity of the thermal model (molten pool dimensions), texture simulation (pole figure intensities), and predicted properties. Crucially, the simulated effective elastic modulus (109–117 GPa) and yield strength (850–900 MPa) under consistent processing parameters align well with experimental ranges (100–140 GPa and 850–1050 MPa, respectively) and show stability regardless of layer or row settings. The Poisson’s ratio exhibits significant anisotropy (approx. 0.45–0.5 in X/Y vs. lower values in other directions). By bridging processing parameters, microstructure evolution, and final properties, this work provides a paradigm for computationally efficient prediction and optimization of AM material performance, paving the way for inverse design strategies.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 680-692"},"PeriodicalIF":6.8,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical modeling for thermal evaluation of scanning patterns in directed energy deposition of curved surface components","authors":"Jiachen Ye ,&nbsp;Jiale Wu ,&nbsp;Qi Liu ,&nbsp;Kai Ren ,&nbsp;Yanlong Cao","doi":"10.1016/j.jmapro.2025.09.036","DOIUrl":"10.1016/j.jmapro.2025.09.036","url":null,"abstract":"<div><div>Directed Energy Deposition (DED) technology can precisely deposit and form metal materials, satisfying the manufacturing requirements of complex curved surface components. Controlling the heat distribution in the deposition area during continuous deposition is crucial to ensure the forming quality. However, previous experimental studies suffered from the problems of high manual cost. In this paper, a numerical modeling method supporting free-path deposition for robot-assisted metal DED processes was developed, which can efficiently and accurately predict the thermal field evolution during the DED manufacturing of curved surface components. The model is built based on real physical scenarios and integrates relevant process parameters, highly restoring the dynamic deposition process of metals. The accuracy of the prediction results was verified by comparing with an infrared thermal image camera on a curved surface component deposition. The study carried out parallel multi-track deposition experiments on cylindrical substrates under three laser scanning patterns, and analyzed the results through the corresponding numerical models. The results show that the established numerical model can provide assistance for evaluating the process strategies of curved surface components DED.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 703-720"},"PeriodicalIF":6.8,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical modeling of ultrasonic cavitation micro-jet impact and experimental study on deburring of crossed V-groove edges","authors":"Yu Lei ,&nbsp;Xipeng Xu ,&nbsp;Bicheng Guo ,&nbsp;Zhilong Xu ,&nbsp;Jiashun Gao ,&nbsp;Wenbin Zhong ,&nbsp;Wenhan Zeng","doi":"10.1016/j.jmapro.2025.09.035","DOIUrl":"10.1016/j.jmapro.2025.09.035","url":null,"abstract":"<div><div>V-groove microstructures are widely used in optics, energy, and electronics due to their excellent functional properties. However, burr formation during ultra-precision machining can significantly compromise surface quality and machining accuracy. This study explores an ultrasonic cavitation deburring method specifically designed for the crossed edges of V-grooves. A theoretical model was established to describe the relationship between the maximum micro-jet impact pressure generated by cavitation bubble collapse and the key process parameters, namely the working gap and ultrasonic amplitude. This model clarifies the burr removal mechanism and defines the critical conditions required for effective deburring. Experiments were conducted to optimize three major parameters: deburring time, ultrasonic amplitude, and working gap. In addition, the influence of cavitation erosion on the surface quality of micro V-grooves was analyzed. The results showed that a burr removal rate of up to 92.1 % was achieved within 40 s, while surface roughness variation was controlled within 15 %.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 721-730"},"PeriodicalIF":6.8,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface roughness and dimensional accuracy of titanium overhanging thin-walls via laser powder bed fusion","authors":"J.M. Dias ,&nbsp;M. Gasik ,&nbsp;F. Bartolomeu ,&nbsp;F.S. Silva ,&nbsp;G. Miranda","doi":"10.1016/j.jmapro.2025.09.037","DOIUrl":"10.1016/j.jmapro.2025.09.037","url":null,"abstract":"<div><div>Laser Powder Bed Fusion offers a promising solution for enabling customized products such as implants with more precision and efficiency. Over 10% of titanium implants for joint replacement cause bone destruction due to incompatibility in mechanical design and improper surface matching. The strategy to overcome these issues involves developing specific surface features, such as overhanging walls, to enhance the bone-implant interface. Such features often require support-free fabrication due to the risk of compromising the integrity of thin-walled features during supports removal. Hence manufacturing of titanium overhanging thin-walls, such a critical element in implants, with proper topology and precision requires knowledge of the correct strategy and processing parameters. However, a critical gap remains in the Laser Powder Bed Fusion production and surface characterization of these structures.</div><div>The purpose of this study is the evaluation of the feasibility of producing unsupported inclined thin-walls using this additive manufacturing technology and assessing the associated surface quality and topology. Here overhanging thin-walls were successfully manufactured with angles closely matching the references (30°, 45°, 60°, 75°, and 90°). Dimensional accuracy and roughness of the walls were assessed for both upskin and downskin surfaces. Higher thicknesses than in designed version were observed for all groups, particularly elevated for 30° overhanging angle, also showing the highest roughness for both upskin and downskin sides. Despite the larger thickness, overhanging angles the 45° and 60° led to the lowest roughness values.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 665-679"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the properties of a low carbon steel and SS316L bimetallic interface via mesoscale groove engineering in hybrid wire-arc directed energy deposition","authors":"Akshar Kota ,&nbsp;Nidhi M. Shanghavi ,&nbsp;Preet M. Singh ,&nbsp;Ji Ho Jeon ,&nbsp;Shreyes N. Melkote","doi":"10.1016/j.jmapro.2025.09.040","DOIUrl":"10.1016/j.jmapro.2025.09.040","url":null,"abstract":"<div><div>In sectors such as marine, chemical processing, construction, and nuclear, bimetallic structures combining low carbon steel (LCS) with stainless steel 316L (SS316L) are widely used for their affordability and superior corrosion resistance. However, joining these dissimilar materials can result in high dilution and un-mixed zones (UMZ), negatively affecting the joint quality. Particularly, high dilution may cause susceptibility to hot cracking in the austenitic zone or low-temperature cracking in the martensitic zone. Additionally, UMZs lead to inconsistent material properties, creating potential weak spots and localized stress concentrations. Both effects not only reduce the mechanical reliability of the joint but also elevate susceptibility to stress corrosion cracking (SCC) under corrosive service conditions. This paper proposes a novel hybrid manufacturing approach that integrates Wire-Arc Directed Energy Deposition (Wire-Arc DED) with precision milling to address these issues at the LCS-SS316L interface when printing three-dimensional bimetallic structures, aiming to minimize dilution and UMZs, thereby enhancing the structural integrity of the bimetallic part. We term this geometry-driven dilution-control strategy “mesoscale groove engineering”, in which a rectangular groove milled in LCS limits base-metal available for melting and thus reduces dilution in the overlying SS316L deposit. Various techniques are employed for microstructure, interfacial, chemical composition, and nano-hardness characterization. It is observed that appropriately sized grooves reduce dilution by 35 % and UMZs by 59.3 %. The reduction in dilution leads to a 26 % reduction in the nano-hardness variance in the largest UMZ. Additionally, slow strain-rate tensile testing (SSRT) in a 3.5 wt% NaCl solution confirms that the groove-engineered interface shows no signs of SCC, while also achieving a 16.4 % increase in ultimate tensile strength without loss in ductility. The proposed approach effectively demonstrates its potential to enhance the interfacial properties of bimetallic structures for specific industrial needs.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 602-618"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved U-net network with temporal adaptive Module for precise melt pool detection in LDED additive manufacturing","authors":"Kenan Zhang,&nbsp;Tianhao Zhao,&nbsp;Ming Chen,&nbsp;Jingwei Zhang,&nbsp;Qinglong An","doi":"10.1016/j.jmapro.2025.09.014","DOIUrl":"10.1016/j.jmapro.2025.09.014","url":null,"abstract":"<div><div>Melt powder laser directed energy deposition (LDED) is a process that involves heating and melting metal powders with a laser, which then causes the powders to condense into molten pools on the substrate. The features of these pools have a direct impact on the components’ material and physical qualities. As a result, precise and timely detection of molten pool shape is critical for efficient quality monitoring and feedback management. In order to partition the metal molten pool region at the pixel level in LDED additive manufacturing process, an improved U-Net network based on the temporal adaptive module (TAM) is presented in this research. First, a database of melt pool morphology is created, which includes a variety of processing factors and metal powder components. Then, an advanced U-Net network is created to semantically partition the melt pool region in order to collect exact melt pool border information. A comparison study of multiple semantic segmentation models is also performed, and the specific contributions of each model component are confirmed via a series of ablation experiments. According to the testing results, the improved U-Net model achieves 95.8% accuracy and 32.5 FPS, which represents a significant improvement in accuracy and performance over other network architectures. Finally, the study investigated the fluctuation of melt pool morphological characteristics in response to various processing factors, as well as the interaction between melt pool morphology and laser power, scanning speed, and powder feeding rate.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 650-664"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity of thermoforming to friction and heat transfer: Simulation and experimental validation","authors":"Florian Schwär","doi":"10.1016/j.jmapro.2025.09.028","DOIUrl":"10.1016/j.jmapro.2025.09.028","url":null,"abstract":"<div><div>Thermoforming is a widely used manufacturing technology for producing thin-walled thermoplastic components, ranging from packaging and travel trolleys to automotive parts. Despite its broad applications, numerical simulation of the process remains challenging, particularly due to the complex surface interactions between sheet and mold, such as friction and heat transfer, which are not yet fully understood. This study presents a coupled thermal-structural simulation of the forming step, with a particular focus on the mold-sheet interface. The interfacial behavior between sheet and mold is strongly temperature-dependent. To characterize this behavior, the coefficient of friction at elevated temperatures is measured using a modified standard friction tester, while the heat transfer coefficient is estimated from in-situ measurements. A nonlinear viscoelastic–viscoplastic model, calibrated using shear and elongational rheological data, is applied to high-impact polystyrene in its rubbery state. For validation, a mold with a high draw ratio and a sharp negative edge was designed. The results show that, in addition to accurately predicting thickness distribution, the model successfully captures defects such as shock marks and loss of detail on sharp edges. Furthermore, the model enables an investigation of how variations in interfacial parameters influence the process outcome. The findings confirm that thermoforming is highly sensitive to both friction and heat transfer. However, since heat transfer between sheet and mold is relatively high, the interfacial temperature can be assumed to remain constant.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 619-631"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wrinkling prediction of bimetallic composite plates: The unified critical wrinkling judgment line","authors":"Bing Du ,&nbsp;Xiangxin Yan ,&nbsp;Tianze Zhang ,&nbsp;Hailong Cui ,&nbsp;Fenghua Liu ,&nbsp;Hengyan Yang ,&nbsp;Chaoyang Huang","doi":"10.1016/j.jmapro.2025.09.029","DOIUrl":"10.1016/j.jmapro.2025.09.029","url":null,"abstract":"<div><div>Wrinkling instability is a significant technical challenge affecting the quality of plastic-forming processes in metal composite plates. The accurate prediction of wrinkling instability holds substantial theoretical and practical value. This study employs a shear wrinkling experiment on bimetallic composite plates and establishes a numerical simulation model using the Buckle + Static-General algorithm in ABAQUS. Experimental comparisons validate the accuracy of the simulation. Based on bifurcation theory and numerical analysis, the critical wrinkling state of the composite plate is determined by the bifurcation time of the stress-strain path in the metal layer with the more significant thickness proportion. Additionally, the stress-neutral layer shift theory confirms that, at the critical wrinkling time, the stress-neutral layer of the composite plate is located within the thicker metal layer. The unified critical wrinkling judgment line of the composite plate is established by extracting the critical wrinkling stress-strain data of the specimens under various stress loading paths. Visualization of wrinkling areas and morphological features is achieved through color mapping, verifying the accuracy of the judgment line. This research provides a robust methodology for predicting wrinkling instability in composite plates.</div></div>","PeriodicalId":16148,"journal":{"name":"Journal of Manufacturing Processes","volume":"153 ","pages":"Pages 632-649"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}