Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Elastic Modulus Determination of Krouse Specimens through Resonance using Simple Beam Theory

Saheli, Massih
http://orcid.org/0000-0001-8623-7364
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1555140817600694

Abstract Details

2019, Master of Science (MS), Ohio University, Mechanical Engineering (Engineering and Technology).
Continued understanding of fatigue and its impact on material performance is an important aspect on the longevity and safety of a part. The pursuit of testing methods which achieve higher cycle rates per unit time has led to interest in cantilevered resonance of Krouse fatigue samples. This displacement-based method must be related back to stress-level, and the Young’s modulus must be known to do so. A test protocol to calculate Young’s modulus from the vibrational relationship of Krouse and rectangular samples at room and elevated temperatures was developed, using AISI 316 stainless steel and AA 6061-T6 aluminum. The natural frequency is used to calculate a rectangular material’s modulus based on resonance. The goal was to relate the natural resonance of a Krouse specimen to a conventional rectangular shape. The modulus of a short rectangular sample was calculated directly with a correction factor to account for the sample’s small length/width ratio. Krouse specimens had lower resonant frequencies than rectangular samples of the same material due to geometrical differences. A modulus correction factor of 1.42 was determined for both materials, which exhibited a threefold difference in elastic modulus. Due to the geometry of the Krouse specimen, the decrease in frequency at elevated temperature is not as pronounced as a rectangular specimen, and the difference in resonance can be accounted for.
Timothy Cyders (Advisor)
Frank Kraft (Committee Member)
Zaki Kuruppalil (Committee Member)
Ryan Fogt (Committee Member)
50 p.
Engineering; Materials Science
Youngs Modulus; elastic modulus; Resonance; Krouse; vibration; elevated temperature; cantilever beam; frequency

Recommended Citations

Citations

  • Saheli, M. (2019). Elastic Modulus Determination of Krouse Specimens through Resonance using Simple Beam Theory [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1555140817600694

    APA Style (7th edition)

  • Saheli, Massih. Elastic Modulus Determination of Krouse Specimens through Resonance using Simple Beam Theory. 2019. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1555140817600694.

    MLA Style (8th edition)

  • Saheli, Massih. "Elastic Modulus Determination of Krouse Specimens through Resonance using Simple Beam Theory." Master's thesis, Ohio University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1555140817600694

    Chicago Manual of Style (17th edition)

ohiou1555140817600694
725
© 2019, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.