Article
Automation & Control Systems
Luis Sanchez-Balanzar, Fernando Velazquez-Villegas, Leopoldo Ruiz-Huerta, Alberto Caballero-Ruiz
Summary: This study implemented a computational multiscale homogenization approach to determine the mechanical properties of mesostructures generated by a material extrusion process (MEP), highlighting the significant influence of pore geometry on mechanical properties. The results were validated by comparing with experimental data.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ruishen Lou, Huimin Li, Jiehua Zhong, Chun Zhang, Daining Fang
Summary: A model for bond formation in the FDM process was studied, showing the importance of fidelity to initial configuration and boundary conditions during the bonding process. Gravity has contrasting effects on bonds in the vertical and horizontal directions, requiring a balance between utilizing gravity to enhance bonding and maintaining dimensional accuracy.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Ceramics
Qinglong He, Jie Jiang, Xianfeng Yang, Li Zhang, Zhe Zhou, Yuan Zhong, Zhijian Shen
Summary: A fused deposition modeling (FDM) system using screw extrusion for feeding granular feedstocks with high solid loading was developed. By optimizing key parameters and determining a processing window, constant extruded mass flow and wire diameter were achieved, leading to successful preparation of zirconia ceramic parts with complex geometries and controlled dimensional accuracy, demonstrating the potential of the technique.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Review
Engineering, Manufacturing
Pratiksha Awasthi, Shib Shankar Banerjee
Summary: This review article summarizes the latest advancements in FDM 3D printing of thermoplastic elastomeric materials, focusing on the development of FDM compatible new materials and improving printability. Strategies to overcome defects in 3D printed TPE parts and enhance mechanical properties are provided, along with discussion on future prospects in this rapidly progressing field.
ADDITIVE MANUFACTURING
(2021)
Article
Mechanics
Aleksey Ni, M. N. Prabhakar, Ik-Hyun Suk, Jong-Kyu Park, Jung-Il Song
Summary: This research focuses on developing a flame-retardant filament using acrylonitrile-butadiene-styrene (ABS) and ammonium polyphosphate (APP) for 3D printing. The study used numerical analysis and experimental tests to optimize the printing parameters and improve the burning performance of the printed samples.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Automation & Control Systems
Saba Molazadeh, Fereydoon Diba, Ali Hosseini
Summary: Material extrusion is an additive manufacturing technique that allows for layer-by-layer fabrication of components with complex geometries. This study focuses on developing a finite element model to predict the mechanical properties of parts made through material extrusion, which exhibit anisotropic material behavior. Experimental tests were conducted to acquire material constants and validate the model's accuracy.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Uzair Ali, Hasan Aftab Saeed, Bilal Anjum Ahmed, Sajid Ullah Butt, Rehan Khan
Summary: This study developed a finite element (FE) model of a hair clipper comb and conducted impact test analysis on the model. The product was fabricated using commercially available materials and physical impact testing was performed on the comb. Microscopic examination of the combs was carried out to analyze the product quality and correlate defects with failure mechanisms. A 3D model of a Philips hair clipper comb was developed using ONSHAPE software and a design study was conducted to understand the impact resistance of the product. Finite element analysis (FEA) was used to simulate drop tests on two different comb designs made with Acrylonitrile Butadiene Styrene (ABS) and Polylactic acid (PLA) materials. The results of the simulation were validated through physical experiments, and it was found that the ABS shell model was the most suitable design.
Review
Materials Science, Composites
Vishal Mishra, Sushant Negi, Simanchal Kar, Anup Kumar Sharma, Yadav Narendra Kumar Rajbahadur, Avinash Kumar
Summary: This article provides a systematic review on thermoplastic composite structure prepared through FDM technology and summarizes the current knowledge about the use of various additives to improve the overall quality of FDM parts. The common defects associated with FDM printed composite structures and the methods required to improve the quality of FDM composite parts are also discussed in this article.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Polymer Science
Kilole Tesfaye Chaka
Summary: This study focuses on investigating the processing parameters and factors that decrease warpage in polypropylene during the fused deposition modeling(FDM) process. By using microfillers and optimizing temperature, dimensional accuracy and mechanical properties of the fused deposited specimens can be improved.
Article
Engineering, Mechanical
Robert S. Chisena, Lei Chen, Albert J. Shih
Summary: The study presents a finite element composite simplification model (CSM) for modeling material extrusion wave infill of thin-walled structures with generalized geometries and loading conditions. The CSM successfully predicts experimentally measured bending stiffness and reduces computation costs and setup time effectively.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Enrique Cuan-Urquizo, Jose Ignacio Espinoza-Camacho, Alberto Alvarez-Trejo, Esmeralda Uribe, Cecilia D. Trevino-Quintanilla, Saul E. Crespo-Sanchez, Alfonso Gomez-Espinosa, Armando Roman-Flores, Oscar Olvera-Silva
Summary: The elastic response of arc structures fabricated using curved-layered fused deposition modeling was studied using the finite element method, focusing on the influence of structural parameters such as subtending angle, overlap between layers, and relative density. The study found that the overlap between layers had a high influence on the mechanical response of such structures. Experimental results showed good agreement with the stiffness range predicted by the FEM model, with microstructural characterization revealing more defects for higher lattice porosity values, affecting structural properties.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Biochemistry & Molecular Biology
Tim Feuerbach, Markus Thommes
Summary: This study highlights the importance of filament as feedstock material form for fused deposition modeling printers. By designing and characterizing a new hot-end method, it enables direct printing of materials from their powder form without the need for an intermediate filament. This new approach successfully expands the range of applicable excipients for fused deposition modeling.
Article
Engineering, Manufacturing
Nafiseh Shadvar, Ehsan Foroozmehr, Mohsen Badrossamay, Iman Amouhadi, Alireza Shojaei Dindarloo
Summary: In this study, the behavior of ABS melt polymer in the extrusion process of FDM and the die swell of extruded polymer were investigated through empirical experiments and simulated using the Finite Element Method. It was found that higher melt temperature and lower material flow rate result in lower pressure drop inside the nozzle and less swelling of the extruded filament. Additionally, experiments were carried out to validate the analytical and numerical simulations.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2021)
Article
Materials Science, Multidisciplinary
Majid Sohrabian, Majid Vaseghi, Hassan Khaleghi, Saman Dehrooyeh, Mohammad Saleh Afshar Kohan
Summary: Additive manufacturing technology has been rapidly expanding, especially in areas like tissue engineering. The study focused on different scaffold architectures and their impact on mechanical properties, with results showing a correlation between mechanical performance and parameters like elastic modulus, yield strength, and geometry rupture resistance factor. The research highlighted the importance of scaffold geometry in determining mechanical properties, as well as the effects of layer pattern sequence changes on mechanical performance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Polymer Science
Daniyar Syrlybayev, Beibit Zharylkassyn, Aidana Seisekulova, Asma Perveen, Didier Talamona
Summary: Fused deposition modeling (FDM) is an affordable and widely used additive manufacturing technology, but its complex physics can lead to non-uniform internal stresses and warpage deformation. Researchers developed a Finite Element Analysis (FEA) model that showed good correlation with experimental results, and optimized warpage using a Taguchi Design of Experiments. By identifying optimal process parameters, they were able to minimize warpage to approximately 320 microns.
Article
Green & Sustainable Science & Technology
Sumit Paul, Syed Mithun Ali, Mohd Asif Hasan, Sanjoy Kumar Paul, Golam Kabir
Summary: This article examines the critical success factors for sustainability in the Bangladeshi wood industry. It identifies research and development, supplier relations, and the use of eco-friendly technology as the most significant factors and reveals their interdependencies.
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.