Composite case development for weapons applications and testing
Mitchell, Cassandra C.
Kwon, Young W.
Molitoris, John D.
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Analysis of the dynamic response of cylindrical carbon fiber/epoxy cases containing high explosive fill was conducted using ALE3D finite element software. To develop an accurate model, material compression testing was performed with a Split Hopkinson Pressure Bar apparatus and Instron SATEC machine to verify high-strain rate and low-strain rate behavior, respectively. Resulting failure modes of compression test samples were similar to those found in current literature. Izod pendulum impact testing was performed to provide an intermediate strain rate comparison. An ANSYS model was developed to ensure fracture energy values obtained from Izod impact testing resulted in material stresses within the bounds of the high strain rate and low strain rate testing. The resulting material properties were input parameters for the ALE3D carbon fiber composite model developed by Kwon. The carbon fiber model and this thesis research provide critical information for testing and development in support of Lawrence Livermore National Laboratory’s Agent Defeat Penetrator Project.
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