IU Indianapolis ScholarWorks :: Browsing by Author "Golub, Michael"

Browsing by Author "Golub, Michael"

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3D Printed ABS and Carbon Fiber Reinforced Polymer Specimens for Engineering Education
(Springer, 2016) Golub, Michael; Guo, Xingye; Jung, Mingyo; Zhang, Jing; Department of Mechanical Engineering, School of Engineering and Technology
Three 3D printed plastic materials, ABS, ABS plus, and CFRP, have been studied for their potential applications in engineering education. Using tensile test, the stress strain curves of the materials have been measured. The Young’s modulus, ultimate strength, and fracture toughness of the materials are calculated from the stress strain curve. The results show that CFRP has the highest stiffness or Young’s modulus. ABS plus has strongest mechanical properties, with highest ultimate strength and fracture toughness. With the measured properties, the 3D printed samples are a viable solution for engineering students to learn mechanical properties of materials.
Board 136: MAKER: Laboratory Improvements for Mechanical Engineering (Phase 2)
(ASEE, 2018) Derrick, Joseph Michael; Golub, Michael; Shrivastav, Vaibhav R.; Zhang, Jing; Mechanical and Energy Engineering, School of Engineering and Technology
The convection heat transfer is explored for a new academic laboratory experiment to help address the lack of practical experimentation due to the continued integration of technology. The objective is to design an experiment to be used in the laboratory that enhances the student understanding of convection process and principles. A cost-effective design is generated with three core principles: 1) Low Cost, 2) Low Maintenance, and 3) Concept Visualization. This is achieved through the following description of the apparatus. The plexiglass chamber has a square base with a designated height. At the bottom of the chamber, there is a rectangular section removed to act as an inlet to the chamber. A high powered mini turbine fan is located at the top of the chamber. The fan acts as the driving force that pulls in the surrounding air from the inlet to generate a flow within the chamber. A door is located on the front of the chamber to allow for interchanging of different test geometries. The geometries being used are 3D printed to components either in the form of a fin (External Flow) or a hollowed channel parallel to the flow (Internal Flow). The components are mounted to the door with cylindrical heater connecting the two. The components are heated to steady state, where the average temperature along the surface is calculated. The velocity, surface temperature, and ambient temperature are recorded using a data acquisition system. The resulting convection coefficients are then determined.
Characterization of tensile and hardness properties and microstructure of 3D printed bronze metal clay
(2017) Golub, Michael; Zhang, Jing
Bronze is a popular metal for many important uses. Currently, there are no economical 3D printers that can print Bronze powders. A recent product, Bronze Metal Clay (BMC) has arrived. Additionally, commercial metal 3D printers require laser or electron beam sources, which are expensive and not easily accessible. The objective of this research is to develop a new two-step processing technique to produce 3D printed metallic component. The processing step includes room temperature 3D printing followed by high-temperature sintering. Since no material data exists for this clay, the tensile strength and hardness properties of BMC are compared to wrought counterpart. In this research tests are completed to determine the mechanical properties of Cu89Sn11 Bronze Metal Clay. The author of this thesis compares the physical properties of the same material in two different formats: 3D printed clay and molded clay. Using measured stress-strain curves and derived mechanical properties, including Young's modulus, yield strength, and ultimate tensile strength, the two formats demonstrate inherit differences. The Ultimate tensile strength for molded BMC and 3D-printed specimens sintered at 960 C was 161.94 MPa and 157 MPa, respectively. A 3D printed specimen which was red at 843 C had 104.32 MPa tensile strength. Factory acquired C90700 specimen had an ultimate stress of 209.29 MPa. The Young's modulus for molded BMC and 3D-printed specimens sintered at 960 C was 36.41 GPa and 37.05 GPa, respectively. The 843 C 3D-printed specimen had a modulus of 22.12 GPa. C90700 had the highest modulus of 76.81 GPa. The Yield stress values for molded BMC and 3D-printed specimens sintered at 960 C was 77.81 MPa and 72.82 MPa, respectively. The 3D-printed specimen had 46.44 MPa. C90700 specimen had 115.21 MPa. Hand molded specimens had a Rockwell hardness HRB85, while printed samples had a mean of HRB69. Also, molded samples recorded a higher Young's Modulus of 43 GPa vs. 33 GPa for the printed specimens. Both samples were weaker than the wrought Cu88:8Sn11P0:2 which had a 72 GPa. Cu88:8Sn11P0:2 also was a harder material with an HRC45. The property di erence between 3D printed, molded, and wrought samples was explained by examining their micro structures. It shows that 3D printed sample had more pores than the molded one due to printing process. This study demonstrates the flexibility and feasibility of using 3D printing to produce metallic components, without laser or electron beam source.
Current Challenges and Outlook of Electric Snowmobile Technology - Lessons from Clean Snowmobile Challenge
(2016) Golub, Michael; Zhang, Jing; Mechanical Engineering, School of Engineering and Technology
Although an electric snowmobile can be constructed, there are several technical challenges to make it viable for end-users. The energy requirements are extremely variable and depend on the weather conditions. Both temperature and snow conditions add to the complexity. The battery life will be shortened in extreme conditions. For example, the snow conditions cause changes to the rolling resistance as shown Figure 1. Current electric snowmobiles have not been able to use less than 200 Wh/mi. The snowmobile can be designed to take on energy denser batteries that will be developed eventually, however currently there is limited volume contained within the snowmobile to store the batteries.
Designing a Low-cost, Light-weight Electric Snowmobile
(Office of the Vice Chancellor for Research, 2016-04-08) Golub, Michael; Zhang, Jing
Clean Snowmobile Challenge (CSC). Both years the team developed an electric snowmobile weighing less than 226 kg (500 lb). Last year a Phantom Snowmobile PD250LT was utilized as a base sled. It was powered by a NetGain WarP 7 DC-series motor and connected directly to the sprocket shaft using a Continental Silent Sync Belt. The belt itself is very quiet and can produce less than 59 dB. The team continued and re-engineered a Polaris Indy 550 to be an environmental friendly snowmobile without compromising the towing capability and produced less noise. For the second year in a row the snowmobile designed had the lowest cost at the competition. This year they used a AC motor that weighed half as much as the DC motor, allowing for the design to have increased battery capacity. The 2016 CSC was the 12th competition where SAE International Clean Snowmobile Challenge has a “Zero-Emissions” category. Global climate change brings the need for alternative transportation choices that have higher efficiency, and create fewer pollutants. There are many efficient hybrid and electric cars being produced that are creating less pollution. However, recreational vehicles creates its fair share of emissions. The Greenland Ice Cap is highly sensitive to chemical and human’s byproduct; the researchers that are located in the Summit Station require special mode of transportation to and from their research sites that do not pollute. Snowmobile trails in the Eastern US are full of riders. Viable improvements to snowmobile designs are needed. The 2016 design used students from several disciples: Mechanical Engineering, Electrical Engineering and others. We received support from MURI and ITEC.
Designing a Low-cost, Light-weight Electric Snowmobile
(Office of the Vice Chancellor for Research, 2015-04-17) Baharuddin, Fatin; Chen, Guiming; Chen, Yu-Ren; Gandhi, Bhavesh Vijay; Mohammed, Samad Abdul; Wible, Grant; Wu, Linmin; Yong, Zhen Wei; Zhang, Yi; Golub, Michael; Zhang, Jing
The Indiana University-Purdue University, Indianapolis Jaguar team is participating in the 2015 SAE Clean Snowmobile Challenge (CSC) with the aim of achieving a low-cost snowmobile that weigh less than 200 kg (441 lb). It was re-engineered to be an environmental friendly snowmobile without forgetting to improve the towing capability and less noise. We are using the Phantom Snowmobile PD250LT that is manufactured by FMC Motor Company and sold through out North America. The modified NetGain WarP 7 DC-series motor is connected directly to the sprocket shaft using a Goodyear Synchronous Belt. The belt itself is very quiet and can produce less than 59 dB.
Designing a Low-Cost, Light-Weight Vehicle Using Additive Manufacturing
(Office of the Vice Chancellor for Research, 2015-04-17) Golub, Michael; Zhang, Jing
The Indiana University-Purdue University Indianapolis (IUPUI) Jaguar team participates in several academic competitions. Both the SAE Clean Snowmobile Challenge and the Shell Ecomarathon benefit from reducing weight to the competition vehicles. Using a purpose-built 3D printer the team designed several parts for the vehicles to reduce weight and become more competitive. The re-engineered vehicles have reduced weight which makes the vehicles more fuel efficient thus environmental friendly without compromising the vehicle performance.
Developing Virtual Reality Module to Improve Student Learning Experience in Additive Manufacturing Curriculum
(ASEE, 2020) Zhang, Jing; Singui, Glorio; Hansraj Wadghule, Shambhuraj; Frend, Chauncey Eugene; Dube, Tejesh Charles; Golub, Michael; Mechanical and Energy Engineering, School of Engineering and Technology
In our current additive manufacturing (AM) curriculum, the study relies on taking lectures and physical lab experiments. With the advance of virtual reality (VR) technologies in terms of both software and hardware, there is a need to advance the education with adopting advanced VR technologies. In this project, we present our latest results of developing new VR modules in AM curriculum. Specifically, the developed VR modules for fusion deposition modeling and fatigue testing will be presented. In the on-going research, students will be required to use the VR modules in comparison with the physical lab experiments. The focus will be understanding the effectiveness of VR technology on engineering curriculum.
Effect of Printing Orientation on Strength of 3D Printed ABS Plastics
(Springer, 2016) Cai, Linlin; Byrd, Philip; Zhang, Hanyin; Schlarman, Kate; Zhang, Yi; Golub, Michael; Zhang, Jing; Department of Mechanical Engineering, School of Engineering and Technology
The mechanical strengths of ABS (Acrylonitrile Butadiene Styrene) components fabricated by fused deposition modeling (FDM) technique have been studied, with the focus on the effect of printing orientations on the strength. Using the properties derived from stress-strain curves of the samples, the 0-degree printed sample has the strongest mechanical properties, which is likely due to preferred orientations in individual slice.
Effectiveness of Current-generation Virtual Reality-based Laboratories
(ASEE, 2018-06) Jones, Alan; Golub, Michael; Mechanical and Energy Engineering, School of Engineering and Technology
Typical curricula in engineering and science disciplines in both secondary and post-secondary education include extensive laboratory experiences. Current generation virtual reality (VR) hardware such as the HTC Vive and the Oculus Rift allow for unprecedented immersive capability such that virtual reality based laboratories may be able to overcome the deficiencies of current virtual labs and tele-operated equipment and provide students with a functional equivalent to the situated learning that occurs in traditional hands-on laboratories. Financial considerations and the interest to deliver more distance-education based courses may encourage more programs to utilize VR laboratory experiences versus traditional laboratories. This paper reports on the perceived effectiveness of using a VR laboratory developed with current generation (HTC Vive) VR equipment in place of a traditional laboratory.

Browsing by Author "Golub, Michael"

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