Article
Automation & Control Systems
Ge Xu, Xun Huang, Shuyun Jiang
Summary: This paper focuses on the stiffness of machine tool spindle supported by fluid bearings and proposes a new methodology to obtain the spindle nose stiffness. The proposed methodology is validated through experimental and theoretical investigation on a motorized spindle with hydrodynamic water-lubricated spiral groove bearings. The results show that the methodology is applicable and the experimental device has advantages of simplicity, low cost, and convenience. Additionally, improvement is expected by introducing another load device to apply perturbed load to the spindle nose.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Automation & Control Systems
Zhe Lv, Rongguo Hou, Guoyong Zhao
Summary: The use of magnetorheological (MR) fluid can prevent the instability and spreading out of jet flow outside the focusing tube in abrasive waterjet machining, while an external axial magnetic field can improve erosion footprint and processing performance. Results from experiments on alumina validate the effectiveness of applying magnetic field to enhance jet flow concentration and restrain velocity attenuation.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Review
Energy & Fuels
Hamed Eshgarf, Afshin Ahmadi Nadooshan, Afrasiab Raisi
Summary: This paper presents a literature review on the properties and applications of Magnetorheological fluids (MRFs). It discusses the magnetic particles, base fluids, and preparation methods of MRFs. The stability and properties of MRFs, as well as their behavior in different states, are also examined. The reversible transition of MRFs between liquid and semi-solid states, known as the magnetorheological effect, is highlighted. The challenges of low magnetic effect and instability are identified, and carbonyl iron particles are suggested as promising particles for MRFs. Various applications of MRFs in engineering, such as batteries, anti-lock braking systems, and shock absorbers, are discussed.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Mechanical
Lukas Schickhofer, Johannes Wimmer
Summary: Shock absorbers, also known as dampers, play a crucial role in ensuring the safety and comfort of passengers in vehicles by absorbing displacement changes. This study investigates the two most common types of shock absorber valves, the spring valve and the shim valve, in a typical motorcycle suspension system. The study explores the properties of the valve system under different flow directions and considers factors such as adhesion force and pressure losses. The findings demonstrate the importance of valve stability, optimization of spring properties, and the impact of key parameters on valve vibrations.
JOURNAL OF FLUIDS AND STRUCTURES
(2022)
Review
Computer Science, Artificial Intelligence
Dhruvil Panchigar, Kunal Kar, Shashank Shukla, Rhea Mary Mathew, Utkarsh Chadha, Senthil Kumaran Selvaraj
Summary: This review explores the applications of CFD in various scenarios and the logical components required for exemplary computations. It examines the influence of machine learning on design parameters with implemented algorithms, as well as research-based algorithms used in different situations. It also analyzes the advantages, disadvantages, and computing tools of the algorithms.
NEURAL COMPUTING & APPLICATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
Ramtin Gharleghi, Arcot Sowmya, Susann Beier
Summary: In this study, a deep learning technique was proposed as an alternative method to calculate blood flow-induced shear stresses in coronary bifurcations. The model showed high fidelity predictions and significantly reduced computational cost compared to traditional computational fluid dynamics methods.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Engineering, Chemical
Khalid Alkhulaifi, Ali Alharbi, Mohsen Alardhi, Jasem Alrajhi, Hamad H. Almutairi
Summary: Valves play a crucial role in controlling fluid flow. The butterfly valve and the pinch valve are two types of valves with different flow characteristics. This study investigates and compares their flow performance, and demonstrates that the pinch valve has the potential to replace the butterfly valve due to its superior flow characteristics in any application.
Article
Environmental Sciences
Andres M. Aguirre-Mendoza, Sebastian Oyuela, Hector G. Espinoza-Roman, Oscar E. Coronado-Hernandez, Vicente S. Fuertes-Miquel, Duban A. Paternina-Verona
Summary: This study developed a two-dimensional CFD model to evaluate the hydraulic performance of the rapid filling process in a hydraulic installation with an air valve, and achieved good results in capturing the pressure evolution in the air pocket.
Article
Ecology
Simone Olivetti, Michael A. Gil, Vamsi K. Sridharan, Andrew M. Hein
Summary: Understanding how migratory animals interact with dynamic physical environments is a major challenge in migration biology. A new methodology using computational fluid dynamic modeling and animal tracking data can predict migratory movements and locomotion behavior accurately. The framework can help understand how migrants respond to local-flow conditions and how migratory behavior changes over time and space.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Mechanics
C. Fernandes, Salah A. Faroughi
Summary: This study presents the development of a particle-level simulation code to study the behavior of magnetic particles in a fluid. The accuracy and robustness of the algorithm are validated through numerical simulations of different flow conditions.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Engineering, Multidisciplinary
Diego Gallo, Umberto Morbiducci, Marco D. de Tullio
Summary: This study investigated the impact of prosthetic heart valves (BHV and MHV) on blood flow. The results showed that MHV had greater helicity than BHV, and there was a strong linear correlation between kinetic energy and helicity. Additionally, the timing of turbulent kinetic energy and fluctuating helicity generation was influenced by the heart valve type. This research is of great importance for improving the design of prosthetic heart valves.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Acoustics
Lai Peng, Dezheng Hua, Xinhua Liu, Darius Andriukaitis, Grzegorz Krolczyk, Zhixiong Li
Summary: An active fluid-film bearing lubricated with magnetorheological fluid (MRF) is proposed to address the problems of insufficient load capacity and rotor vibration. The study designs the geometry of the MRF fluid-film bearing, analyzes its intelligent lubrication mechanism, and verifies the method's validity through numerical simulation. The simulation results show that the MRF bearing has the ability to suppress rotor vibration and the IGWO-PID controller has better response characteristics than other algorithms.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Yousif Badri, Thaer Syam, Sadok Sassi, Mohammed Hussein, Jamil Renno, Saud Ghani
Summary: CFD analysis was conducted on a mono-tube vehicle MRF damper with fluid MRF-132DG, showing a 70% increase in viscosity values with elevated magnetic field excitation current. The results of CFD simulation were compared to experiments, demonstrating good match and validating the accuracy of the analysis.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Engineering, Mechanical
Mohammad Tauviqirrahman, J. Jamari, Arjuno Aryo Wicaksono, M. Muchammad, S. Susilowati, Yustina Ngatilah, Caecilia Pujiastuti
Summary: In this study, a computational investigation into the acoustic and tribological performances in journal bearings is presented, using a heterogeneous pattern with rough surfaces engineered in certain regions. Numerical results show that heterogeneous rough/smooth bearings can provide lower noise and larger load-carrying capacity compared to conventional bearings, with discussions on the effects on friction force.
Article
Thermodynamics
Hazim S. Hamad, N. Kapur, Z. Khatir, O. M. Querin, H. M. Thompson, Yongxing Wang, M. C. T. Wilson
Summary: A novel computational fluid dynamics-enabled multi-objective optimization methodology is proposed and applied to investigate the impact of design parameters on the performance of a polymerase chain reaction flow system. The results demonstrate that selecting appropriate substrate material and channel dimensions can improve temperature uniformity, while channel area and substrate conductivity have a significant influence on pressure drop and heating power.
APPLIED THERMAL ENGINEERING
(2021)
Article
Automation & Control Systems
Adrian Rodriguez, Mikel Gonzalez, Octavio Pereira, L. Norberto Lopez de Lacalle, Mikel Esparta
Summary: This article presents a feasibility study on introducing automated robotic deburring into the precision machining process of aerospace engine components. By using visual inspection and various tools for automation, the operating time can be reduced.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Din Bandhu, E. Venugopal Goud, Jay J. Vora, Subhash Das, Kumar Abhishek, Ramendra Kumar Gupta, Ashish Thakur, Soni Kumari, K. Devaki Devi
Summary: This study performed butt welding experiments using the processes of resistance metal powder welding (RMD) and gas metal arc welding (GMAW), and conducted macroscopic and microscopic analysis of the welds. The results showed that RMD welding produced better weld quality, smaller heat-affected zone, and finer grain refinement.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
M. Aurrekoetxea, L. N. Lopez de Lacalle, O. Zelaieta, I Llanos
Summary: This study developed an uncertainty assessment procedure for the on-machine Layer Removal method and provided guidelines for data treatment. The main uncertainty source was found to be the on-machine probing measurements. Applying symmetry and data filtering reduced the uncertainty range.
EXPERIMENTAL MECHANICS
(2023)
Article
Green & Sustainable Science & Technology
Felipe Marin, Adriano Fagali de Souza, Alexandre Mikowski, Luis Henrique Guarnieri Fontanella, Paulo Soares, Luis Norberto Lopez de Lacalle
Summary: The hybrid manufacturing process of combining initial machining and posterior laser powder bed fusion (LPBF) can reduce costs and manufacturing time. This research investigates the properties of the melting interface zone (MIZ) in hybrid parts and assesses the influence of LPBF process energy density on the MIZ and mechanical properties. The results show high-quality interphase even with low energy density, and the costs and manufacturing time were reduced by about 50%.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Benat Inigo, Ander Ibabe, Luis Norberto Lopez de Lacalle, Gorka Aguirre
Summary: This study proposes an artefact-based fast and automated solution for mapping volumetric errors in medium size 3-axis machine tools. It enables the calibration of a 1m3 workspace in less than 1 hour without prior knowledge of temperature variations. By performing continuous measurements for seven days and identifying a volumetric error variation model, this study estimates uncertainties of individual parameters and motion errors using residual errors and propagates them to the TCP through Monte Carlo simulations. The model is used to understand the changes in volumetric positioning error over time and its generation within the kinematic chain of the machine.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Correction
Green & Sustainable Science & Technology
Felipe Marin, Adriano Fagali de Souza, Alexandre Mikowski, Luis Henrique Guarnieri Fontanella, Paulo Soares, Luis Norberto Lopez de Lacalle
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Alejandro Pascual, Naiara Ortega, Soraya Plaza, Luis Norberto Lopez de Lacalle, Eneko Ukar
Summary: This study presents an XRCT-based FEM methodology to assess the influence of porosity defects on the mechanical behavior and failure of L-PBF AlSi10Mg components. The defects are evaluated through XRCT scanning and porosity analysis, followed by FEM modeling. Tensile tests and further XRCT inspections are conducted to examine the relationship between fracture level and porosity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Multidisciplinary
F. J. Amigo, G. Urbikain, L. N. Lopez de Lacalle, O. Pereira, P. Fernandez-Lucio, A. Fernandez-Valdivielso
Summary: The hottest parts of aerospace components often require machining of heat-resistant materials. New high-feed machining strategies have been introduced to improve productivity rates, but tracking tool wear is crucial for timely replacement. High pressure cooling and cryogenic techniques are used to assist the machining of aggressive materials while reducing environmental impact. This study presents a prediction cutting model for high feed turning of Nimonic (c) C-263 superalloy, considering tool wear and the benefits of reducing side cutting edge angle. The wear prediction model shows good agreement with experimental results and reveals the significant increase in tool life achieved by reducing the side cutting edge angle.
Article
Chemistry, Analytical
Endika Tapia, Leonardo Sastoque-Pinilla, Unai Lopez-Novoa, Inigo Bediaga, Norberto Lopez de Lacalle
Summary: Industrial communication protocols are important for interconnecting systems and machines in industrial environments. In this study, we evaluated the performance and complexity of OPC-UA, Modbus, and Ethernet/IP protocols when used with machine tools. Our results show that Modbus has the best latency figures, and the complexity of communication varies depending on the protocol used.
Article
Materials Science, Multidisciplinary
Kiran Wakchaure, Rakesh Chaudhari, Ajaykumar Thakur, Kishan Fuse, Luis Norberto Lopez de Lacalle, Jay Vora
Summary: Submerged friction stir welding (SFSW) was used to weld 6 mm thick 6061Al-T6 alloy plates under different water temperatures. The results showed that submerged samples had finer grain size and higher microhardness, and defect-free joints were obtained. Moreover, water temperature had a significant effect on the welding results, with joints welded at 80 degrees C exhibiting the highest tensile strength and microhardness.
Article
Thermodynamics
Sakshum Khanna, Sagar Paneliya, Parth Prajapati, Rakesh Chaudhari, Jay Vora, Hussam Jouhara
Summary: This study demonstrates a modified synthesis route for fabricating n-hexacosane-impregnated graphene nanosheets (GrPCM) nanocomposite. The exfoliation of graphene sheets during the hydrothermal and sonication process increases the surface area for improved impregnation and interaction with n-hexacosane. The GrPCM nanocomposites exhibited enhanced thermal stability, higher thermal conductivity, and improved latent heat compared to pure PCM materials. The findings suggest that GrPCM3 is an excellent composite material for efficient heat transfer processes.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Engineering, Manufacturing
Jay Vora, Yug Shah, Sakshum Khanna, Vivek K. Patel, Manoj Jagdale, Rakesh Chaudhari
Summary: This study identified current, pulse-off-duration (Toff), and pulse-on-duration (Ton) as vital input factors for the WEDM process of Ti6Al4V. Empirical models were generated and validated using ANOVA, showing a significant impact of these factors on material removal rate (MRR) and surface roughness (SR). Additionally, the use of expanded graphite (EG) nano-powder was found to improve the WEDM process, increasing MRR by 45.35% and reducing SR by 36.16%.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2023)
Article
Chemistry, Physical
Jay Vora, Rudram Pandey, Pratik Dodiya, Vivek Patel, Sakshum Khanna, Vatsal Vaghasia, Rakesh Chaudhari
Summary: This study investigates and optimizes the bead geometries of SS-309L using a GMAW-based WAAM process. The Box-Behnken design approach is used for trials, and regression models are developed. The optimized parameters yield a maximum BH of 9.48 mm and a minimum BW of 5.90 mm for single-layer depositions.
Article
Engineering, Mechanical
Inigo Aldekoa, Ander del Olmo, Leonardo Sastoque-Pinilla, Sara Sendino-Mouliet, Unai Lopez-Novoa, Luis Norberto Lopez de Lacalle
Summary: This paper presents a study on sensorless machine variable monitoring for tool wear monitoring in broaching in real production environments. The research establishes a correlation between the variables of a broaching machine's servomotors and the condition of the broaching tools. The authors propose an effective method for measuring broaching tool wear without external sensors, and provide a detailed explanation of the methodology for reproducibility. The results show high predictive accuracy, with a coefficient of determination surpassing 0.9, using machine learning models trained on data collected from trials on an electromechanical vertical broaching machine.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)