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Providing Learning Opportunities by Designing a Split Hopkinson Pressure Bar

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2013 ASEE Annual Conference & Exposition


Atlanta, Georgia

Publication Date

June 23, 2013

Start Date

June 23, 2013

End Date

June 26, 2013



Conference Session


Tagged Division

Mechanical Engineering

Page Count


Page Numbers

23.1007.1 - 23.1007.21



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Paper Authors


Mohamad Dyab University of Maryland Eastern Shore

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Mohamad Dyab currently works at the University of Maryland Eastern Shore (UMES) on a research project on modeling and simulation of wind turbines for structural health monitoring purposes. Mr. Dyab received his Undergraduate Degree with Honors in Engineering with a Mechanical Engineering Specialization from the University of Maryland Eastern Shore (UMES) in December 2012. For his senior design project, Mr. Dyab designed and fabricated a working prototype of a small-size Hopkinson Pressure Split Bar for material properties characterization under high speed deformation. During the undergraduate studies, Mr. Dyab worked as a team leader for AIRSPACES Project (Air-propelled Instrumented Robotic Sensory Platform(s) for Assateague Coastline Environmental Studies) at UMES from 2010 to 2012.

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Payam Matin University of Maryland Eastern Shore

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Dr. Payam Matin is currently an Associate Professor in the Department of Engineering and Aviation Sciences at the University of Maryland Eastern Shore (UMES), Princess Anne, Maryland. Dr. Matin has received his Ph.D. in Mechanical Engineering from Oakland University, Rochester, Michigan in May 2005. He has taught a number of courses in the areas of mechanical engineering and aerospace at UMES. He has served as departmental ABET committee chair through a successful accreditation visit in Fall 2012. Dr. Matin’s research has been mostly in the areas of Computational Mechanics and Experimental Mechanics with applications in Solid Mechanics, Plasticity and Sheet Metal Forming. Dr. Matin has published more than 25 peer-reviewed journal and conference papers. Dr. Matin is the recipient of NSF MRI award as a Co-PI. Dr. Matin worked in Automotive industry for Chrysler Corporation from 2005 to 2007. He Joined UMES in August 2007. He is affiliated with ASME and ASEE professional societies.

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Yuanwei Jin University of Maryland, Eastern Shore

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Dr. Yuanwei Jin is currently an Associate Professor of Electrical Engineering in the Department of Engineering and Aviation Sciences at the University of Maryland Eastern Shore (UMES). He received his Ph.D. degree in Electrical Engineering from the University of California at Davis in 2003. From 2003 to 2004, he was a Visiting Researcher with the University of California at Santa Cruz. From 2004 to 2008, he was a Postdoctoral Research Fellow, then Project Scientist, with the Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA. From August 2008 to July 2012, he was an Assistant Professor with the Department of Engineering and Aviation Sciences at the University of Maryland Eastern Shore, Princess Anne, MD. From August 2010 to June 2012, he served as the Interim Department Chair.

His research interests are in the general area of signal processing and sensor array processing, with applications in radar/sonar, biomedical imaging, structural health monitoring, and non-intrusive loading monitoring for smart facilities. He received a 2010 Air Force Summer Faculty Fellowship award. He was a recipient of an Earle C. Anthony Fellowship from the University of California at Davis. He is a Senior Member of the IEEE. He holds two U.S. patents. He is affiliated with several IEEE societies, Sigma Xi, SPIE, and ASEE.

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Providing Learning Opportunities by Designing a Split Hopkinson Pressure BarSenior students are always challenged to apply their engineering knowledge and research skillsgained from an engineering curriculum toward design and implementation of challenging seniordesign projects. Split Hopkinson pressure bar is an apparatus that is used to study materialsbehavior under high speed deformation, where strain rate is very high. Hopkinson bars areusually custom made based on the needs of customers, who are mostly researchers in universitiesor research labs. In this work, the authors provided learning opportunities for engineeringstudents to design a small size split Hopkinson pressure bar in a form of senior design project.The objectives of this project are to engage students: 1) to design a well-structured Hopkinsonbar by means of solid mechanics fundamentals and finite element simulation 2) to build aworking prototype of the apparatus designed for future research activities; and 3) to develop highspeed deformation experiments for instructional purposes. The designed Split Hopkinson barconsists of two metallic bars with a specimen placing in between, a striker assembly, an aircompressor, an instrumentation and data acquisition system. The experiments for using the splitHopkins bar are conducted as an impact is made by the striker on one of the bars, whichgenerates stress wave through the specimen and the other bar. During the experiments, strain inspecimen is determined by measuring strains on the bars using strain gauges mounted on thebars.Students implemented the fundamentals of solid mechanics to design the apparatus. Studentsalso built the solid model of the apparatus using CAD software and validated the design byextensive finite element simulation. A working prototype was physically built and tested.Preliminary tests demonstrate that the performance of the apparatus is as desired. In this paper,the authors elaborate on how the students have utilized the extensive engineering knowledgeacquired throughout the course to design and develop this Hopkinson pressure bar and thus theeducational gains achieved. This work is supported by an NSF’s CMMI (Civil, Mechanical andManufacturing Innovation) program.

Dyab, M., & Matin, P., & Jin, Y. (2013, June), Providing Learning Opportunities by Designing a Split Hopkinson Pressure Bar Paper presented at 2013 ASEE Annual Conference & Exposition, Atlanta, Georgia. 10.18260/1-2--22392

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