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The Development of a Truly Hands-on Torsional Strength of Materials Testing Lab

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Conference

2017 ASEE Annual Conference & Exposition

Location

Columbus, Ohio

Publication Date

June 24, 2017

Start Date

June 24, 2017

End Date

June 28, 2017

Conference Session

Division Experimentation & Lab-Oriented Studies - Labs in Mechanical and Materials Engineering

Tagged Division

Division Experimentation & Lab-Oriented Studies

Page Count

16

DOI

10.18260/1-2--28957

Permanent URL

https://peer.asee.org/28957

Download Count

921

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Paper Authors

biography

David Che Mount Vernon Nazarene University

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Dr. Che is currently Professor of Engineering at Mount Vernon Nazarene University in central Ohio. His areas of interests include CAD/CAM/CAE, manufacturing engineering, quality engineering, mechanical design & GD&T, engineering mechanics and engineering education. He is a member of ASME and ASEE.

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Abstract

Traditionally, strength of materials labs include tensile testing of prepared metal samples. This is normally achieved through the use of an automated tensile testing machine with data acquisition system (hardware and software). Even though students may need to load the part into the fixture manually, during the pulling process, students are mostly reduced to the role of a passive observer. This is simply due to the fact that it is impossible for human hands to pull apart a metal piece. Some education technology providers such as PASCO, Inc. sell a hand-cranked tensile testing machine that would give students some “feel” of the strength of different materials [4]. But the equipment is not suitable for torsional testing, and the “hands-on” experience it offered is still limited. In this paper, a “quick and dirty” low-budget torsional strength testing lab has been developed that would give students maximum exposure to hands-on material testing. There is no need for special fixtures - the required equipment/tools for this lab can normally be found in any machine shop. Students will have a chance to learn some basic skills using shop tools such as a lathe, a grinder, a vise, a Vernier caliper, etc. Simple torsional load calculation is required for this lab. It can also lead to a study of industrial fasteners which normally is only briefly covered in a machine component design class in the senior year.

Weakness of this lab is that a needle-type mechanical torque wrench is not very accurate. The reading of measurements of torque and twist angles would all require some “eye-balling.” But overall, the educational experience gained through this lab is well worth it for students. It facilitates student learning of various shop tools. Some assessment data is presented at the end of the paper. A poster presentation of part of this work was previously made at the 2016 ASEE North Central regional conference [10].

Che, D. (2017, June), The Development of a Truly Hands-on Torsional Strength of Materials Testing Lab Paper presented at 2017 ASEE Annual Conference & Exposition, Columbus, Ohio. 10.18260/1-2--28957

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