Dissertation/Thesis Abstract

An Experimental Method for Testing Materials at the Intermediate Strain Rate with Closed Loop Control
by Krivanec, Cory Nicholas, M.S., Mississippi State University, 2018, 72; 10978708
Abstract (Summary)

Quasi static and intermediate strain rate (5 s–1 and 500 s–1) tests are conducted on various aluminum and steel ASTM E8 subsize tensile specimens to validate a newly developed testing method which combines a previously developed serpentine bar for load monitoring and a newly described high-speed actuator. This new actuator is controlled by a semi-passive piezoelectrically actuated brake system mounted to a standard actuator, which allows for the actuator to produce high loads and quick response times (≈ 100 µs). Limitations of this experimental method are that tests must be monotonic (tension or compression but not cyclic loading) and strain rate rise times limit this method to the intermediate strain rate regime (below 500 s–1).

Indexing (document details)
Advisor: Whittington, Wil
Commitee: Jones, bill, Rhee, hongjoo, el kadiri, Haitham
School: Mississippi State University
Department: Mechanical Engineering
School Location: United States -- Mississippi
Source: MAI 58/03M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Mechanical engineering, Materials science
Keywords: Intermediate, Method, Steel, Strain rate
Publication Number: 10978708
ISBN: 978-0-438-75858-2
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