Use of complex notation for solving vibrations equations
SAGE Journals » International Journal of Mechanical Engineering Education
by Metin Gürgöze, Atakan Altınkaynak
4h ago
International Journal of Mechanical Engineering Education, Ahead of Print. Complex numbers and complex functions are frequently utilized in solving equations of motion in free and harmonic responses of vibration systems. However, certain fundamental details are sometimes overlooked and many books and articles may present differential equations with inconsistencies, which can confuse meticulous readers. This confusion often arises because one side of the equations is in real form, while the other side is expressed in complex form. To address this issue, the present article offers examples from ..read more
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The first and second laws of thermodynamics are logically equivalent
SAGE Journals » International Journal of Mechanical Engineering Education
by Richard Kaufman
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. In the September 2022 issue of The Physics Teacher (TPT), Richard Kaufman and Harvey Leff showed the interdependence of the first and second laws of thermodynamics. Here, I go further and use the facts that the first law implies the second law, and that the second law implies the first law. This two-way implication establishes the logical equivalence of the first and second laws. Although the laws are logically equivalent (when one is true, then the other must be true), this does not mean that they are the same. The equ ..read more
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DIY-PIV system for Poiseuille flow investigation in undergraduate fluid mechanics course
SAGE Journals » International Journal of Mechanical Engineering Education
by Volodymyr Brazhenko, Ievgen Mochalin, Jiancheng Cai
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. Fluid flow visualization techniques are becoming more widespread every year due to the availability of lasers, high-speed cameras, and the development of a large amount of image processing software. Nowadays, one of the most popular methods of flow optical visualization is particle image velocimetry (PIV). PIV is an innovative way to measure and analyze fluid characteristics, giving students a more in-depth understanding of how fluids move. This paper is focused on using low-cost components and free software to implemen ..read more
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Computer training tools for students and graduates of railway universities in the development of practical skills
SAGE Journals » International Journal of Mechanical Engineering Education
by Artem Akulov, Kostiantyn Zhelieznov, Oleksandr Zabolotnyi, Eugene Chabaniuk, Angela Shvets
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. Teaching the basics of a profession to university students and graduates requires the use of intensive training methods to reduce time and increase the efficiency of knowledge acquisition. Railway workers have a special responsibility related to the safety of train traffic. In this regard, appropriate training, retraining, and certification should be provided. For this purpose, it is appropriate to use computer interactive teaching methods that use modern technologies for modeling and simulating the operation of various ..read more
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Preliminary design of a hypersonic airbreathing vehicle based on four steps: An academic approach to learning
SAGE Journals » International Journal of Mechanical Engineering Education
by Eduardo Bento Guerra, George Santos Marinho, Douglas do Nascimento Silva, Paulo Gilberto de Paula Toro
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. This article proposes a systematic approach for the preliminary design of a hypersonic airbreathing (scramjet) vehicle within an academic context. The goal is to serve as an educational tool, focusing on teaching students the fundamental physical concepts behind scramjets. The article provides essential equations for generic scramjet designs while explaining the simplifications made from an academic perspective. It demonstrates the use of spreadsheets as a user-friendly tool to modify parameters and observe the behavior ..read more
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Cables of a prescribed length under concentrated or distributed loads
SAGE Journals » International Journal of Mechanical Engineering Education
by Marko V Lubarda, Vlado A Lubarda
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. A general analysis of inextensible perfectly flexible cables of negligible weight and a prescribed length, loaded by an arbitrary number of concentrated loads, or by a uniformly distributed load per unit horizontal length, is presented. A catenary cable under its own weight, with or without a concentrated force, is also considered. The sags under loads and tensions in all segments of the cable are determined. The results are derived in closed-form, apart from a numerical solution of a single nonlinear algebraic equation ..read more
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Teaching without PowerPoint slides in engineering: A pilot study
SAGE Journals » International Journal of Mechanical Engineering Education
by Mohamed Kara-Mohamed
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. Using PowerPoints slides (PPT) to deliver lectures has become the norm and common practice in academia over the last decade. Despite the benefits of PPT in providing smooth presentations and helping to prompt the presenter, the use of slides in engineering teaching has its own drawbacks. By using slides in teaching, the information will be provided in a discontinued and very abstract format. However, as a matter of fact, students mainly depend on lecturing slides in their learning and only use the slides to prepare for ..read more
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A project-based learning (PBL) on gas dynamic concepts using hydraulic analogy technique
SAGE Journals » International Journal of Mechanical Engineering Education
by Natarajan Rajamurugu
1M ago
International Journal of Mechanical Engineering Education, Ahead of Print. This article suggests the hydraulic analogy technique as a cost-effective approach for flow visualization in fluid mechanics, particularly in dealing with challenges related to supersonic flow, such as shock waves and flow past wedges. The project-based learning approach is adopted to engage students in the study effectively. This active learning method allows students to actively participate in research activities, from setting project goals to designing and executing experiments. The article highlights the positive im ..read more
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A learning-centred computational fluid dynamics course for undergraduate engineering students
SAGE Journals » International Journal of Mechanical Engineering Education
by Xiangdong Li, Sherman CP Cheung
2M ago
International Journal of Mechanical Engineering Education, Ahead of Print. The great demands for computational fluid dynamics (CFD) practitioners in industry have motivated universities to integrate CFD courses into undergraduate curricula. This article introduces a learning-centred CFD course that aims to train critical users of commercial CFD codes. The main features of the course include a project-based approach to learning and assessment-guided learning activities, both scaffolded by technologies. The implementation of the course is informed by contemporary pedagogical theories that encour ..read more
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Active learning approach through integrative case studies and experimental activities applied in a postgrad course on structural dynamics
SAGE Journals » International Journal of Mechanical Engineering Education
by Diego Francisco Ledezma-Ramírez
2M ago
International Journal of Mechanical Engineering Education, Ahead of Print. Structural dynamics is an essential aspect of mechanical engineering and a key module in the master's program in automotive engineering at the Universidad Autónoma de Nuevo León. Since this discipline requires a strong theoretical foundation coupled with significant practical application, it is essential to provide students with the necessary tools and content to gain a comprehensive understanding of the subject through engaging and applied case studies. This article presents the teaching methodology of a structural dyn ..read more
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