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Validating Automotive Frame Torsion Stiffness Measurement Techniques

Young, Alexander
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470672143

Abstract Details

2016, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
The stiffness, particularly torsion stiffness, of a frame, body or chassis is of paramount concern to the automotive structural engineer. An accurate measurement of torsion stiffness has several useful applications, among which are the characterization of construction quality, model calibration and suspension tuning. Static techniques for measuring torsion stiffness are perhaps as old as the automotive industry itself, and each manufacturer has its own version of the classical static torsion stiffness test. It is also common for a manufacturer to quote a new model’s torsion stiffness in industry publications, the values of which continually increase with improving material and construction technologies. In recent years, dynamic methods have emerged which approach the problem of measuring torsion stiffness using experimental frequency response function (FRF) and modal analysis techniques. The primary purpose of this thesis is to further determine the utility of one such dynamic method, namely, the enhanced Rotational Compliance Function (eRCF), in terms of its accuracy in relation to an implementation of the classical static torsion stiffness test. To this end, two automotive frames made by the University of Cincinnati Formula SAE® (UC-FSAE) Team are the test structures. When compared to typical commercial automotive structures, which contain embedded frames and surface shear panels, these steel triangulated frames are considered simple structures. In order to produce quality static values, the UC-FSAE static torsion stiffness measurement apparatus is to be updated and improved.
Randall Allemang, Ph.D. (Committee Chair)
David L. Brown, Ph.D. (Committee Member)
Allyn Phillips, Ph.D. (Committee Member)
63 p.
Mechanical Engineering; Mechanics
Static Torsion Stiffness; Rotational Compliance; eRCF

Recommended Citations

Citations

  • Young, A. (2016). Validating Automotive Frame Torsion Stiffness Measurement Techniques [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470672143

    APA Style (7th edition)

  • Young, Alexander. Validating Automotive Frame Torsion Stiffness Measurement Techniques. 2016. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470672143.

    MLA Style (8th edition)

  • Young, Alexander. "Validating Automotive Frame Torsion Stiffness Measurement Techniques." Master's thesis, University of Cincinnati, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470672143

    Chicago Manual of Style (17th edition)

ucin1470672143
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© 2016, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.