An Investigation of the Impact Behavior of Vacuum-Formed Tetracore.
ARMY AVIATION RESEARCH AND DEVELOPMENT COMMAND ST LOUIS MO
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Vacuum-formed cellulose butyl-acetate Tetracore specimens were subjected to flatwise compression, torsion, and three-point bending tests to compare the results with a three-dimensional finite element computer program which was specifically developed to analyze Tetracore structures. Results indicate that the computer program is capable of accurately predicting the deflection of Tetracore panels with face sheets. In addition, low velocity impact tests at 10 and 14 fps were conducted to determine the energy-absorbing characteristics. The results indicate that the basic geometry of Tetracore provides an inherent energy-absorbing capability due to the accordion-type failure mode if ductile materials are used. Author