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Developing the Axisymmetric Expanding Ring: A High Strain-Rate Materials Characterization Test

Johnson, Jason R
http://rave.ohiolink.edu/etdc/view?acc_num=osu1387807565

Abstract Details

2014, Doctor of Philosophy, Ohio State University, Materials Science and Engineering.
Towards the end goal of high rate tensile characterization of any material, existing ideas and newly developed technology have been combined in the form of a test platform dubbed the FIRE system. The acronym stands for Fully Instrumented Ring Expansion, a concept that is capable of evaluating the dynamic behavior of a wide range of materials in tension at strain rates well in excess of 1000/s. At the center of the design is a collection of techniques used to impulsively drive ring shaped samples radially outward in a highly symmetric fashion. This geometry avoids many of the traditional pitfalls associated with high rate testing such as end effects and critical extension speeds. Precision velocimetry has been adapted to the system utilizing state of the art optical and electronic equipment via a subassembly known as PDV (Photon Doppler Velocimetry). The PDV capabilities at present include determination of sample velocities up to 3.2 km/s with simultaneous displacement resolution on the order of 1-10 microns. As validation of the techniques developed, numerous representative material studies were carried out and compared to established data from other sources. Results were found to be in favorable agreement, verifying the efficacy of the methods. Additionally, the expanding ring test has been applied in conjunction with sample types and actuator technologies not reported previously. This provides an expanded usefulness to the test, which has been developed to the point now of being user friendly.
Glenn Daehn, Dr. (Advisor)
Michael Mills, Dr. (Committee Member)
John Lippold, Dr. (Committee Member)
Alan Hirvela, Dr. (Committee Member)
185 p.
Electromagnetics; Engineering; Experiments; Materials Science; Mechanical Engineering; Mechanics; Metallurgy; Physics
Ring expansion; axisymmetric expanding ring test; high rate testing; high strain rate; OFHC copper; FIRE system; photon doppler velocimetry; PDV

Recommended Citations

Citations

  • Johnson, J. R. (2014). Developing the Axisymmetric Expanding Ring: A High Strain-Rate Materials Characterization Test [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1387807565

    APA Style (7th edition)

  • Johnson, Jason. Developing the Axisymmetric Expanding Ring: A High Strain-Rate Materials Characterization Test. 2014. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1387807565.

    MLA Style (8th edition)

  • Johnson, Jason. "Developing the Axisymmetric Expanding Ring: A High Strain-Rate Materials Characterization Test." Doctoral dissertation, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1387807565

    Chicago Manual of Style (17th edition)

osu1387807565
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© 2014, some rights reserved.Creative Commons License Developing the Axisymmetric Expanding Ring: A High Strain-Rate Materials Characterization Test by Jason R Johnson is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.