"In the following report, some of the properties of ALCOA 7075 T651 aluminum, when subjected to high rates of loading, are experimentally investigated by impacting two rods of the material longitudinally. One rod is accelerated to a uniform velocity with an air gun launcher. The stationary second rod is instrumented with strain gages on its lateral surface in order to determine the strain-time history following impact. A detailed description of the experimental equipment is included. Simple, one-dimensional theory is used to determine the dynamic, elastic modulus of the test material under the impact condition. Several observations regarding the behavior of the material under dynamic, plastic loading conditions are made. The importance of equipment frequency response is noted and a method is suggested for estimating the experimental error in strain measurement resulting from equipment frequency response limitations. Several other possibilities of experimental error are noted and suggestions for improvement of the experimental apparatus are given. A theoretical development for the case of the longitudinal impact of two viscoelastic rods is presented and the numerical results are summarized for the impact of two rods of a Maxwell material. Computer programs to facilitate the determination of air gun parameters and to evaluate the solutions for the viscoelastic case are included"--Abstract, page ii.
Oetting, R. B.
Gatley, William S.
Antle, Charles E.
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
University of Missouri--Rolla. Department of Mechanical and Aerospace Engineering
University of Missouri--Rolla
vii, 90 pages
© 1968 Allen Glenn Behring, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Aluminum -- Testing
Materials -- Dynamic testing
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b1067623~S5
Behring, A. G., "Analytical and experimental methods for determining the properties of materials at very high rates of loading" (1968). Masters Theses. 6700.