Volume 9: Engineering Education最新文献

{"title":"i9Masks: From a Multidisciplinary Summer Project to a Non-Accredited Short Course","authors":"V. Carvalho, Cristina S. Rodrigues, G. Minas, Rui A. Lima, J. Teixeira, S. Teixeira","doi":"10.1115/imece2021-73495","DOIUrl":"https://doi.org/10.1115/imece2021-73495","url":null,"abstract":"\u0000 This study presents a research experience with engineering students at undergraduate and graduate levels, during the summer of 2020 at the School of Engineering, University of Minho, Portugal.\u0000 Following the first pandemic event in Portugal, from March to May 2020, the Foundation for promoting Science and Technology (FCT) has opened a call for research projects among students and researchers at different Universities. The main aim of these projects was to motivate students to return physically to the campus during a summer course, and to promote a research environment among them.\u0000 i9Masks was one of the projects approved by the University of Minho and its main objective was the development of innovative masks in a silicone elastomer for the protection of COVID-19 with the use of state-of-the-art technologies. The development of masks was at the time a very hot topic as well as a fashionable subject for research.\u0000 Considering the results obtained, from the final works presented by students, a very positive balance of the experience was achieved.\u0000 The i9Masks project was a useful learning experience for engineering education, particularly in Portugal, where the opportunity to participate in this type of “learning by doing” experience is very small.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115735397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Students Perceptions of a Hybrid and Flexible Teaching Model for Post-COVID19 Normality","authors":"M. Rodríguez-Paz, J. A. González-Mendivil, Israel Zamora-Hernández, J. A. Zárate-García","doi":"10.1115/imece2021-71742","DOIUrl":"https://doi.org/10.1115/imece2021-71742","url":null,"abstract":"\u0000 In this work we present a hybrid model that can be applied in theoretical Engineering courses, combining flipped learning, collaborative activities and online tutorials. A total of 200 students that participated in online courses with the authors responded a survey. The results include what in the students’ perception was the best implementations of online courses, what makes a course attractive and motivating for students and also, what should be avoided in future implementations of courses that need to be taught in an online format. Some of the results show that students did not enjoy courses where lecturing was the main element during most of the session. The recommendations included in this work deal not only with the type of contents an online course should have but also with certain details about some recommended courses professors could take in advance, that is, before they start teaching online and some other recommendations that can make a model like this one a successful model for online teaching in a post-covid world.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132494051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D-Printed Laboratory Equipment for Vibrations and Control Theory Courses: Pendulum, Cantilever Beam, and Rectilinear System","authors":"Martin Garcia, Benjamin Estrada, Elizabeth Lucier, C. Tekes, T. Utschig, A. Tekes","doi":"10.1115/imece2021-69866","DOIUrl":"https://doi.org/10.1115/imece2021-69866","url":null,"abstract":"\u0000 Learning by doing has proven to have numerous advantages over traditionally taught courses in which the instructor teaches the topic while students remain passive learners with little engagement. Although laboratories give hands-on opportunities for undergraduate mechanical engineering students, they have to wait for a semester for the lab course for instance the prerequisite of the vibrations and control laboratory is the mechanical vibrations course. Since the nature of the dynamics branch consisted of dynamics, vibrations, and control theory courses are highly mathematical, students struggle comprehending the introduced topic and relate the theory to its real-world application area. Furthermore, it’s almost impossible for an instructor to bring the existing educational laboratory equipment to the class since they are bulky and heavy. The advents in manufacturing technology such as additive manufacturing bring us more opportunities to build complex systems new materials.\u0000 This study presents the design, development, and implementation of low-cost, 3D printed vibratory mechanisms to be utilized in mechanical vibrations, control theory courses along with their associated laboratories. A pendulum, cantilever beam integrated with springs, and a rectilinear system consisted of two sliding carts, translational springs, and a scotch yoke mechanism are designed. The main parts of the mechanisms are 3D printed using polylactic acid (PLA), polyethylene terephthalate glycol (PETG), and thermoplastic polyurethane (TPU).","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126381447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated System Architecture Development Framework and Complexity Assessment","authors":"Akshay Dalvi, H. El-Mounayri","doi":"10.1115/imece2021-67515","DOIUrl":"https://doi.org/10.1115/imece2021-67515","url":null,"abstract":"\u0000 Systems engineering is the popular top-down systematic approach to understand and develop complex systems. There is a gap between the systems engineering activities and engineering analysis in major system development processes. This paper presents an integrated MBSE development framework with definite and indefinite modeling capabilities to bridge this gap. The framework uses SysML, a system modeling language, to describe its elements from the system architecture’s perspective. A detailed workflow is presented that guides the engineer throughout the modeling process. The workflow establishes traceability throughout the framework. This research uses Functional Mock-up Interface (FMI) standards to integrate system engineering activities and engineering analysis. A district cooling system case study is presented to demonstrate the framework’s capabilities in enabling the system into existence. The system architecture model was developed using SysML language in the Cameo Enterprise Architecture environment. The engineering analysis model used object-oriented Modelica language in the Dymola environment. The analysis results show that the district chiller model developed using Modelica produces chilled water below 6.6 degrees Celsius, satisfying the district chiller’s system requirement. The exponential trend in the system architecture’s complexity pattern is measured and analyzed using complexity assessment techniques. The results show that the structural complexity of the system increases steadily from 2.7080 to 8.1241. However, the behavioral complexity increases drastically from 1.7915 to 59.2686 in the problem domain.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128471655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introducing Mechanical Engineering Students to Online Robotics Laboratories","authors":"Juliana Danesi Ruiz, P. Deierling","doi":"10.1115/imece2021-68276","DOIUrl":"https://doi.org/10.1115/imece2021-68276","url":null,"abstract":"\u0000 Due to Covid-19, in-person robotics labs held in previous semesters were not possible. This paper explores a well-established method to give the students an exceptional learning experience in a robotics class. By surveying students, data was gathered to account for students’ perception when designing the laboratories and lab manuals. In addition, to find an adequate program for the labs, different software was researched and tested. The main factors used to select a software were intuitiveness, cost, online resources, operating system compatibility, Python programming, and software usage. It is concluded that the RoboDK software is the most suitable software for the laboratories, and updated manuals needed to be designed for the Spring 2021 class. Last semester, Spring 2021, another survey was conducted to get students’ feedback on the new lab system. With the additional data, further research may be conducted to refine the laboratories’ assignments and manuals. This paper’s main contribution is to use and analyze RoboDK for online robotics laboratories. Therefore, through this research, a new method was presented that gave students hands-on experience on online laboratories.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133838297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Trilogy of e-STEM Programs","authors":"Mohamed Gharib, Tala Katbeh, G. B. Cieslinski, Bradley Creel","doi":"10.1115/imece2021-69012","DOIUrl":"https://doi.org/10.1115/imece2021-69012","url":null,"abstract":"\u0000 In recent years, pre-college educational programs have been introduced to increase the interest and supply of skillful people to work in STEM fields. While the emphasis has previously been primarily focused on the content of project-based learning programs, another factor that needs to be accounted for is the accessibility of the said programs. Unprecedented issues such as the sudden closure of educational facilities, as was experienced during the COVID-19 pandemic, should not hinder the learning opportunities that the students are after. Therefore, the shift from hosting conventional STEM programs to online platforms has become a crucial element in the expansion of STEM education. Delivering engineering-based projects through online STEM programs to school students includes wide expansion of the participating audience — which is not confined by the capacity limit of in-person programs — as well as ease of access. This has value not only on the individual level but also at the social level.\u0000 Three successful e-STEM (electronic STEM) programs are presented in this paper that are designed to support and enhance students’ learning of engineering concepts while also increasing students’ understanding of real-life applications. This has a close connection to the desire to increase online education in developing countries over recent years. The first program is called Innovate, Design and Engineer an App (IDEA). In this program, the students explore the fundamentals of programming and mobile app development. This provides the students with the foundation of coding, algorithms, and refining their ideas to produce a working mobile phone app that is created to meet a specified challenge. The second program is called Creative Fusion and Innovation (CFI). In this program, the students learned the basics of creating, editing, and analyzing their 3D designs; recognize the importance of creating 3D models in engineering; and understand how 3D printing works as they create their own 3D models. The third program is called Virtual Robotics Games (VRG). In this program, the students learn the fundamentals of designing, building, programming, and testing robots in a virtual environment. Through this program, the students learn the basics of robot design in addition to coding and simulation, which are all necessary tools for aspiring engineers.\u0000 These programs aim to provide STEM education access to build communities specifically in engineering, which is in high demand. Throughout these programs, the students are able to learn important computer skills and the concepts of the engineering design process. The programs also equip them with the required knowledge and problem-solving skills to tackle challenges. At the end of each program, the students will have created successful designs as solutions to the real-life problems that they were tasked with. In this paper, the details behind the planning, formation and production, and implementation of the three online pro","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incorporation of Blade Twist and Non-Uniform Inflow Effects In Undergraduate Helicopter Aeronautics Whirl Stand Laboratory","authors":"Jeremy D. Paquin, Evan Harris, Emma San Martin, Dennis P. Kirby, R. Melnyk, Nathan Humbert","doi":"10.1115/imece2021-71169","DOIUrl":"https://doi.org/10.1115/imece2021-71169","url":null,"abstract":"\u0000 Flight and aerodynamics laboratory experiences have supported the aeronautical engineering courses in the United States Military Academy’s mechanical engineering program for over 50 years. Whirl stands are the rotary-wing equivalent of wind tunnels; they are used to generate experimental data on small- or full-scale rotor systems. The helicopter whirl stand laboratory is a cornerstone event in the program’s Helicopter Aeronautics course, used to reinforce students’ understanding for predicting and calculating hover performance data. The experimental apparatus includes a remote control (RC) helicopter mounted to a static test stand, instrumented with load cells to measure lift and torque. The helicopter is capable of varied revolutions per minute (RPM) and collective blade pitch. Control of the apparatus and measurement readings occur from behind a protective wall with an observation window. The objective of the laboratory is to compare the results of predictive analyses, conducted using Blade Element Theory (BET) and Blade Element Momentum Theory (BEMT), to experimental data. Students calculate the coefficient of thrust based on collective pitch angles and atmospheric conditions using an iterative approach in numerical analysis software. A recent effort appreciably improved the lab by adding two experimental twisted-blade cases in addition to the original untwisted blades. The ability to change between the original and updated (twisted) blades offers insight into the advantages and disadvantages of each in hover. The upgraded blades were designed internally by students to match the original rotor diameter, outsourced for precision manufacturing, and tested for incorporation into the laboratory. Overall, the upgraded laboratory offers a relevant, comprehensive application to deepen students’ conceptual understanding of rotorcraft aerodynamics, laboratory procedures, and modeling principles taught in the course.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125048185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PropCart: STEM for Aviation and Windpower","authors":"Julian Earwaker","doi":"10.1115/imece2021-68729","DOIUrl":"https://doi.org/10.1115/imece2021-68729","url":null,"abstract":"\u0000 PropCart is a three wheeled model vehicle with a variable pitch pusher propeller and rubber band motor.\u0000 This paper presents the construction and testing of this vehicle as a platform for teaching concepts of linear and rotational mechanics, and elementary aerodynamics of airfoils applied in aircraft and wind turbines.\u0000 Building and testing the vehicle is proposed as a 12th Grade STEM project: SCIENCE component: Physics; Linear and Rotational Mechanics with practical determination of basic and derived quantities in particular uniformly accelerated motion. TECHNOLOGY component: Design and construction of the vehicle. ENGINEERING component (overlapping technology): Measurement of thrust of the propeller at different setting angles using video data of propeller angular velocity and cart linear velocity; enabling determination of relative wind and angle of attack, calculation of Reynolds number and identifying stall angle without the use of a wind tunnel. MATHEMATICS component: Data analysis using Excel. A teaching course based mainly on the Khan academy physics programme is provided to support concepts used in the propeller cart project.\u0000 PropCart is based on a four wheeled vehicle with fixed pitch propeller, devised by David Newton (1999).\u0000 A redesigned three wheel vehicle with a variable pitch propeller was used in a practical project in a 12 week introductory engineering course at the University of Canterbury (2002) for 15 Petronas students. 12 students completed the project: Test videos for each student were taken in PAL format at 25fps for time intervals of 1–2 seconds for propeller setting angles of 15, 30 and 45 degrees; with student choice of the number of rubber bands used and the number of windup turns. Readings of linear and angular motion were taken with software which could select frame by frame display.\u0000 Linear and angular displacement against time were plotted against time and time squared.\u0000 Separate experiments were conducted on the performance of the propeller with the cart fixed with motor axis normal to an annular scale graduated in degrees. The propeller using 2 rubber bands was wound up by 30 turns for each test. Setting angles from 0 to 90 degrees were used. Graphs of angular displacement against time were compared over one second and plotted on a common time axis for setting angles 0 to 90 degrees. The graphs show that stalling occurs at angles greater than 15 degrees.\u0000 Cart linear motion and propeller angular velocity within a one second time interval were related. Angular velocity of the propeller against time was a piecewise function: At low setting angles near 15 degrees tending to an acceleration sub-function followed by a constant velocity sub-function the latter giving constant thrust and constant linear acceleration of the cart.\u0000 The angular displacement against time squared graph showed non uniform decreasing acceleration, with the rate of decrease increasing with time squared due to drag; further supported by the t","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126923095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermo-Mechanical Stresses in the Design and Analysis of Thick-Walled Pressure Vessels","authors":"A. Mohammadzadeh, S. Haidar","doi":"10.1115/imece2021-66582","DOIUrl":"https://doi.org/10.1115/imece2021-66582","url":null,"abstract":"\u0000 In design and analysis of mechanical and structural components, stresses due to the existence of temperature field in the part cannot be overlooked. In some practical cases, thermal stresses make a significant portion of total stresses.\u0000 In undergraduate stress analysis courses, the topic of thermal stresses is covered only in cases of uniform temperature rise and in presence of mechanical loads [1], [2]. Stresses induced by means of temperature gradient alone and in the absence of any mechanical loads are completely ignored. Although coverage of thermal stresses is available in advanced textbooks [3, 4, 5, 6, 7], nevertheless, the level of coverage is beyond the scope of undergraduate students’ understanding.\u0000 To address this important aspect of stress analysis in our undergraduate curriculum, the authors developed a project in the design and analysis of a thick-walled pressure vessel subject to a high internal pressure and a stiff temperature gradient in the cylinder wall, and they assigned a version of it to the students in the senior level machine design class at their university. Students were teamed in groups of three and were given one month to come up with their stress analysis results and design decisions for choice of bolts selected to fasten the cylinder’s caps to its body. The goal of this paper is mainly to present the pedagogical approach of the stress analysis aspect of this project in the cylindrical portion far away from the cap ends.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"39 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134095725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing University Persistence of Diverse Mechanical Engineering Students","authors":"J. Fertig, S. Kumpaty","doi":"10.1115/imece2021-70862","DOIUrl":"https://doi.org/10.1115/imece2021-70862","url":null,"abstract":"\u0000 This paper is the third in a series of efforts to address the troublesome departure of promising college students, most notably women and minorities, from the field of mechanical engineering and similar disciplines. Despite widespread and largely successful efforts to increase the numbers of women and minorities in engineering education, their numbers continue to shrink at a time when they should be expanding. Our first inquiry (IMECE 2017-72597) proposed a mismatch between the empathizing tendency of many students and a climate that discourages professional outlets for such tendencies; as well as incongruencies between professional and engineering identities. We argued that female students were deterred from their engineering aspirations by a climate that included engineering stereotypes, a traditional male-style hierarchy, and differential treatment. Our second endeavor (IMECE 2020-23679) showcased findings from a subsequent STEMpathy study we conducted at our own institution that inspired a persistence model that placed social responsibility goals, or the desire to pursue a career for the betterment of humanity, as well as treatment of students, front and center in the effort to better understand female and minority persistence. Surrounding that goal orientation are categories of factors that deter women and minorities that can be categorized as: 1) Cultural ideological forces; 2) Social structural factors; and 3) the Organizational culture of mechanical engineering. The current undertaking advances empirically based recommendations on ways to: 1) foster a more inclusive engineering culture; 2) enhance the curriculum; and 3) improve public perception of mechanical engineering with the aim of boosting students’ desire to embrace and persist in mechanical engineering. Persistence data from our study informs a five-year NSF grant: S-STEM: The Mechanical Engineering Retention, Academic Success and Career Pathway Program (NSF: DUE-2027632).","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130591979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}