Mississippi State University
El Kadiri, Haitham
Date of Degree
Graduate Thesis - Open Access
Master of Science
James Worth Bagley College of Engineering
Department of Mechanical Engineering
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).
Krivanec, Cory N., "An Experimental Method for Testing Materials at the Intermediate Strain Rate with Closed Loop Control" (2018). Theses and Dissertations. 553.