Theses and Dissertations

Issuing Body

Mississippi State University


Gullet, Philip M.

Committee Member

Cargile, James D.

Committee Member

Lacy, Thomas E.

Date of Degree


Document Type

Graduate Thesis - Open Access


Civil Engineering

Degree Name

Master of Science


James Worth Bagley College of Engineering


Department of Civil and Environmental Engineering


The purpose of this investigation was to provide quality dynamic strength properties for a solid grade severe-weather (SW) brick material and to illustrate the need for careful evaluation of the strain-rate effects on geomaterials. A split Hopkinson pressure bar (SHPB) was used to perform a series of tests on specimens from a solid grade SW brick to determine the mechanical response of this material at high strain-rates. Both classical and modified SHPB tests were performed. The results from the classical SHPB tests provided evidence that modifications to the SHPB are necessary when testing geomaterials such as brick. To modify the SHPB, a small copper disk was placed at the impact end of the SHPB incident bar to increase the rise time of the initial pulse. The material response from the modified SHPB tests provided an average compressive strength of 104 MPa, which resulted in a dynamic increase factor of 1.42.