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Synergistic mechanisms of temperature and strain rate on plastic deformation in SLM 3D printed SS316L utilizing hot processing map analysis

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Scientific Reports 2025年第1期15卷 1-20页

作者： Saxena, Ambuj Dwivedi, Shashi Prakash Sharma, Shubham Mishra, Neeraj Gupta, Tarun Kumar Beemkumar, N. Kedia, Ankit Rao, V. Nagabhushana Massoud, Ehab El Sayed Kozak, Dražan Lozanovic, Jasmina Department of Mechanical Engineering G. L. Bajaj Institute of Technology and Management Greater Noida 201306 India Department of Mechanical Engineering Lloyd Institute of Engineering and Technology Noida Greater India Department of Technical Sciences Western Caspian University Baku Azerbaijan Centre for Research Impact and Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura 140401 India Jadara University Research Center Jadara University Irbid Jordan Center for Artificial Intelligence and Robotics Madhav Institute of Technology & Science Gwalior 474005 India Department of Mechanical Engineering School of Engineering and Technology JAIN (Deemed to Be University) Karnataka Bangalore India Department of Mechanical & Aerospace Engineering NIMS Institute of Engineering & Technology NIMS University Rajasthan Jaipur India Department of Mechanical Engineering Raghu Engineering College Andhra Pradesh Vishakhapatnam 531162 India College of Applied Sciences King Khalid University Dhahran Al-Janoub Saudi Arabia Mechanical Engineering Faculty in Slavonski Brod University of Slavonski Brod Trg Ivane Brlić-Mažuranić 2 Slavonski Brod HR-35000 Croatia Department of Engineering FH Campus Wien - University of Applied Sciences Vienna 1100 Austria

The plastic deformation behavior of selective laser melting (SLM) 3D printed SS316L steel has been analyzed at the temperature range 25- 1000℃ (25 (room temperature), 200, 400, 600, 800 and 1000℃) and strain rate range 10⁻³-10³s⁻¹ (10⁻³, 10⁻², 10⁻¹, 10⁰, 10¹, 10² and 10³ s⁻¹) under compressive loading environments. The flow stress vs. plastic strain results revealed that the flow stress was reduced 136.64% from room temperature to 1000℃ at 10⁻³s⁻¹. Further, the flow stress was decreased 102.86% from room temperature to 1000℃ at 10³s⁻¹. The flow stress was increased 46.63% from 10⁻³s⁻¹ to 10³s⁻¹ at room temperature. Moreover, the flow stress was increased 95.07% from 10⁻³s⁻¹ to 10³s⁻¹ at 1000℃. The temperature and strain rate effect on strain rate sensitivity (m) has been observed for SLM 3D printed SS316L steel. Based on strain rate sensitivity (m), the power dissipation efficiency () and instability dimensionless parameter () map plot contours have been investigated under various hot working parameters for SLM 3D printed SS316L steel. Further, hot working processing maps have been generated by superimposing instability dimensionless parameters () map on the power dissipation efficiency () map for SLM 3D printed SS316L steel. The processing map was further related with investigated material microstructure to identify the hot processing safe and unsafe zone for SLM 3D printed SS316L. The unsafe instability region occurred at the low strain rate range (10⁻² – 10⁻¹ s⁻¹), high strain rate range (10²-10³ s⁻¹) and temperature range (200–400℃, and 800 − 100℃) for 0.02, 0.04, 0.06, 0.08 and 0.10 strain. Further, the remaining area was useful for hot workability

关键词： 3D printing Instability dimensionless parameter () map Plastic flow behavior Power dissipation efficiency () map Processing map Selective laser melting (SLM) SS316L steel Strain rate sensitivity (m) Vicker’s hardness

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Mechanistic Modeling and Multiscale Applications for Precision Medicine: Theory and Practice

Network and Systems Medicine

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Network and Systems Medicine 2020年第1期3卷 36-56页

作者： Stalidzans, Egils Zanin, Massimiliano Tieri, Paolo Castiglione, Filippo Polster, Annikka Scheiner, Stefan Pahle, Jürgen Stres, Blaž List, Markus Baumbach, Jan Lautizi, Manuela Van Steen, Kristel Schmidt, Harald H.H.W. Computational Systems Biology Group University of Latvia Riga Latvia Latvian Biomedical Reasearch and Study Centre Riga Latvia Centro de Tecnología Biomédica Universidad Politécnica de Madrid Pozuelo de Alarcón Spain CNR National Research Council IAC Institute for Applied Computing Rome Italy Oslo Norway Institute for Mechanics of Materials and Structures Vienna University of Technology Vienna Austria BioQuant Heidelberg University Heidelberg Germany Department of Animal Science University of Ljubljana Ljubljana Slovenia Faculty of Civil and Geodetic Engineering University of Ljubljana Ljubljana Slovenia Department of Automation Biocybernetics and Robotics Jozef Stefan Institute Ljubljana Slovenia Big Data in BioMedicine Research Group Chair of Experimental Bioinformatics TUM School of Weihenstephan Technical University of Munich Freising Germany Chair of Experimental Bioinformatics TUM School of Weihenstephan Technical University of Munich Freising Germany Computational Systems Medicine Research Group Chair of Experimental Bioinformatics TUM School of Weihenstephan Technical University of Munich Freising Germany BIO-Systems Genetics GIGA-R University of Liège Liège Belgium BIO3 - Systems Medicine Department of Human Genetics KU Leuven Leuven Belgium Department of Pharmacology and Personalised Medicine Faculty of Health Medicine and Life Science Maastricht University Maastricht Netherlands

Drug research, therapy development, and other areas of pharmacology and medicine can benefit from simulations and optimization of mathematical models that contain a mathematical description of interactions between systems elements at the cellular, tissue, organ, body, and population level. This approach is the foundation of systems medicine and precision medicine. Here, simulated experiments are performed with computers (in silico) first, and they are then replicated through lab experiments (in vivo or in vitro) or clinical studies. In turn, these experiments and studies can be used to validate or improve the models. This iterative loop of dry and wet lab work is successful when biomedical researchers tightly collaborate with data scientists and modelers. From an educational point of view, the interdisciplinary research in systems biology can be sustained most effectively when specialists have been trained to have both a strong background in the disciplines of biology or modeling and strong communication skills, which make them able to communicate with other specialists. This overview addresses possible interdisciplinary communication gaps. Focusing our attention on biomedical researchers, we describe the reasons for using modeling and ways to collaborate with modelers, including their needs for specific biological expertise and data. This review includes an introduction to the principles of several widely used mechanistic modeling methods, focusing on their areas of applicability as well as their limitations. A potential complementary role of machine-learning methods in the development of mechanistic models is also discussed. The descriptions of the methods also include links to corresponding modeling software tools as well as practical examples of their application. Finally, we also explicitly address different aspects of multiscale modeling approaches that allow a more complete and holistic perspective of the human body. © Egils Stalidzans et al. 2020 Published b

关键词： Iterative methods

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From multi-modal property dataset to robot-centric conceptual knowledge about household objects

arXiv

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arXiv 2019年

作者： Thosar, Madhura Mueller, Christian A. Jaeger, Georg Schleiss, Johannes Pulugu, Narender Chennaboina, Ravi Mallikarjun Jeevangekar, Sai Vivek Birk, Andreas Pfingsthorn, Max Zug, Sebastian Institute for Intelligent Cooperating Systems Faculty of Computer Science Otto-von-Guericke University Magdeburg Germany Robotics Computer Science & Electrical Engineering Department Jacobs University Bremen Germany Institute for Computer Science Technische Universität Bergakademie Freiberg Germany OFFIS Institute for Information Technology Oldenburg Germany

Tool-use applications in robotics require conceptual knowledge about objects for informed decision making and object interactions. State-of-the-art methods employ hand-crafted symbolic knowledge which is defined from a human perspective and grounded into sensory data afterwards. However, due to different sensing and acting capabilities of robots, their conceptual understanding of objects must be generated from a robot's perspective entirely, which asks for robot-centric conceptual knowledge about objects. With this goal in mind, this article motivates that such knowledge should be based on physical and functional properties of objects. Consequently, a selection of ten properties is defined and corresponding extraction methods are proposed. This multi-modal property extraction forms the basis on which our second contribution, a robot-centric knowledge generation is build on. It employs unsupervised clustering methods to transform numerical property data into symbols, and Bivariate Joint Frequency Distributions and Sample Proportion to generate conceptual knowledge about objects using the robot-centric symbols. A preliminary implementation of the proposed framework is employed to acquire a dataset comprising physical and functional property data of 110 houshold objects. This Robot-Centric dataSet (RoCS) is used to evaluate the framework regarding the property extraction methods, the semantics of the considered properties within the dataset and its usefulness in real-world applications such as tool substitution. Copyright © 2019, The Authors. All rights reserved.

关键词： Decision making

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Experimental implementation of a new non-redundant 6-DOF quadrotor manipulation system

arXiv

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arXiv 2019年

作者： Khalifa, Ahmed Fanni, Mohamed Department of Industrial Electronics and Control Engineering Faculty of Electronic Engineering Menofia University Egypt Department of Mechatronics and Robotics Engineering Egypt-Japan University of Science and Technology Egypt Department of Production Engineering and Mechanical Design Mansoura University Egypt

This paper presents an experimental validation of a new quadrotor-based aerial manipulator. A quadrotor is equipped with a 2-DOF robotic arm that is designed with a new topology to enable the end-effector of the whole system to track a 6-DOF trajectory. An identification experiment is carried out to find out the system parameters. The mathematical model of the whole system is presented. A measurement scheme is proposed to get the accurate pose of the vehicle considering the motion of the manipulator below the quadrotor. The system controller is designed and implemented based on PID with a gravity compensation algorithm. System simulation is implemented in the MATLAB/SIMULINK environment with real system parameters, to better emulate a realistic setup. Real-time Experiments are conducted. Both simulation and experimental results show the feasibility and a satisfactory efficiency of the proposed system in achieving the position holding and transferring an object to a specific target position. Copyright © 2019, The Authors. All rights reserved.

关键词： Manipulators

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Experimental validation of the sensing capabilities of tunable interdigital transducer

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Diagnostyka 2018年第1期19卷 49-56页

作者： Maka, Micha AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Robotics and Mechatronics al. A. Mickiewicza 30 Krakow30-059 Poland

Modern systems and methods of Structural Health Monitoring (SHM) and Non Destructive Testing (NDT) require new types of transducers. In this paper, a new type of Lamb Wave transducer, the Tunable Interdigital Transducer (T-IDT), developed at AGH University of science and technology, is presented and its sensing capabilities are discussed based on experimental tests. The properties of the proposed transducer are similar to those of a traditional Interdigital Transducer (IDT), except for its ability to change the wavelength to which the transducer is tuned without introducing any physical changes in the electrode layout. In the paper, three sets of experiments are presented. The first two determine the ability of the transducer to measure the distance of damage from the transducer. The last set of experiments investigates the angular sensitivity of the proposed transducer for modelled damage. The presented results are compared to ones obtained with a traditional IDT.

关键词： Surface waves

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Hydrogen production combining steam reform and electrolysis by electrochemical cell using proton conducting oxide 16

Hydrogen production combining steam reform and electrolysis ...

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16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019

作者： Okuyama, Y. Nagatomo, S. Niisaka, A. Matsunaga, N. Sakai, G. Sasamata, Y. Ogura, Y. Mizutani, Y. Department of Environmental Robotics Faculty of Engineering University of Miyazaki 1-1 Gakuenkibanadai-nishi Miyazaki889-2192 Japan Technical Research Institute Toho Gas Co. Ltd. 507-2 Shinpo-machi Tokai City476-8501 Japan Inorganic Functional Materials Research Institute National Institute of Advanced Industrial Science and Technology 2266-98 Anagahora Shimo-shidami Moriyama-ku Nagoya463-8560 Japan

ISBN: (纸本)9781607688747

Steam electrolysis using a proton conducting oxide might offer low-cost hydrogen production using a combination of electrical energy and thermal energy that comes from solar energy. On the other hand, the hydrogen production efficiency is low due to the electrical leakage for the electrolysis of H2O-O2. In this study, the additive effect of methane on the hydrogen production efficiency for stem electrolysis using a proton conducting oxide was examined. The steam electrolysis was performed under a H2O-O2, H2O-CH4 atmosphere at 1073 K. The hydrogen evolution rate of the H2O-CH4 electrolysis with the Ru catalyst was in agreement with the value according to Faraday's law. The hydrogen evolution rate and the electrolysis voltage were found to increase in the order of the H2O-CH4 electrolysis with the catalyst © The Electrochemical Society.

关键词： Electrolysis

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Preface

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Studies in Computational Intelligence 2022年第4期1034卷 v-ix页

作者： Borangiu, Theodor Trentesaux, Damien Leitão, Paulo Cardin, Olivier Joblot, Laurent Faculty of Automatic Control and Computer Science University Politehnica of Bucharest Bucharest Romania LAMIH UMR CNRS 8201 Polytechnic University Hauts de France Valenciennes France Research Centre in Digitalization and Intelligent Robotics Polytechnic Institute of Bragança Bragança Portugal LS2N UMR CNRS 6004 IUT de Nantes University of Nantes Carquefou France Arts et Métiers Institute of Technology LISPEN HESAM Université UBFC Cluny France

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Analysis of Some of the In-Duct Acoustic Pressure Measurement Errors

Analysis of Some of the In-Duct Acoustic Pressure Measuremen...

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Joint Conference - Acoustics

作者： Łukasz Gorazd Karolina Kolber Anna Snakowska Jerzy Jurkiewicz Faculty of Mechanical Engineering and Robotics AGH University of Science and Technology Krakow Poland Faculty of Electrical Engineering Automatics AGH University of Science and Technology Krakow Poland

The article analyses discrepancies in the results of the acoustic pressure measurement carried out for measuring points located on the duct axis at a chosen distance from the sound sources. The measurement set-up consists of a self-designed single mode synthesizer located inside anechoic termination and a measuring section with the microphone moving along the waveguide radius. Several measurement series were carried out for each of the generated consecutive single modes, i.e. (0,0), (1,1), (2,1), (0,1) and a frequency wideband signal for an axisymmetrical and non - axisymmetrical position of a single sound source. For each case, calculations of the mean value and the type A standard uncertainty were executed by means of the classical method but also by the bootstrap estimate of the mean value and the bootstrap estimation of the uncertainty. The results obtained applying each of the listed methods were discussed and compared with each other. The non-zero result of the standard deviation indicates some eccentricity in the measurement set - up and so it can serve as a hint to improve axiality of the system.

关键词： Acoustic measurements Acoustics Biomedical measurement Pressure measurement Standards Ducts Uncertainty

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Predictive Inverse Kinematics: optimizing Future Trajectory through Implicit Time Integration and Future Jacobian Estimation

Predictive Inverse Kinematics: optimizing Future Trajectory ...

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2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Ko Ayusawa Wael Suleiman Eiichi Yoshida CNRS-AIST JRL (Joint Robotics Laboratory) UMI13218/RL Intelligent Systems Research Institute National Institute of Advanced Industrial Science and Technology (IS-AIST) Japan Electrical and Computer Engineering Department Faculty of Engineering University of Sherbrooke Canada

This paper presents an inverse kinematics (IK) method which can control future velocities and accelerations for multi-body systems. The proposed IK method is formulated as a quadratic programing (QP) that optimizes future joint trajectories. The features of the proposed IK are: (1) the evaluation of accelerations at future time instances, (2) the trajectory representation that can implicitly integrate the time integral formula into QP, (3) the computation of future Jacobian matrices based on the comprehensive theory of differential kinematics proposed in our previous work. Those features enable a stable and fast IK computation while evaluating the future accelerations. We also conducted thorough numerical studies to show the efficiency of the proposed method.

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Adaptive Backstepping of Synergistic Hybrid Feedbacks with Application to Obstacle Avoidance

Adaptive Backstepping of Synergistic Hybrid Feedbacks with A...

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American Control Conference

作者： Pedro Casau Ricardo G. Sanfelice Carlos Silvestre Institute for Systems and Robotics (ISR) Instituto Superior Técnico Universidade de Lisboa Lisboa Portugal University of California Santa Cruz CA 95064 USA Department of Electrical and Computer Engineering of the Faculty of Science and Technology of the University of Macau Macau China

ISBN: (纸本)9781538679012;9781538679265

In this paper, we show that the hybrid controller that is induced by a Synergistic Lyapunov Function and Feedback (SLFF) pair relative to a compact set, can be extended to the case where the original affine control system is subject to a class of additive disturbances known as matched uncertainties, provided that the estimator dynamics do not add new equilibria to the closed-loop system. We also show that the proposed adaptive hybrid controller is amenable to backstepping. Finally, we apply the proposed hybrid control strategy to the problem of global asymptotic stabilization of a compact set in the presence of an obstacle and we illustrate this application by means of simulation results.

关键词： Obstacle avoidance Backstepping Feedback Collision avoidance Liapunov function control systems Closed loop systems Self tuning Controllers

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