DTIC AD0850572: The Dynamic Response of Graphitic pdf

DTIC AD0850572: The Dynamic Response of Graphitic

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Graphitic materials are receiving consideration for nose tip and heat shield application on advanced reentry vehicles because of their low ablation rate and high strength at elevated temperatures. In selecting materials for design application where impulsive loading is encountered, the dynamic response characteristics of the candidate materials must be known. The present investigation studies the response characteristics of pyrolytic and monolithic graphite: material failure modes, dynamic strength, and relative performance are included. The materials under investigation are monolithic graphites (ATJ, POCO (AXF), and Graphitite G) and pyrolytic graphites (conventional PG, boron-doped PG, and Hafnium-doped PG). Samples are subjected to strain rates of 200 to 2000 in/in/sec and peak stress wave amplitudes between 2000 and 30,000 psi. The results of this investigation have found immediate application in the evaluation of these materials in studies concerned with the simulation of certain weapon effects

• Creator/s: Defense Technical Information Center
• Date: 3/25/1969
• Year: 1969
• Book Topics/Themes: DTIC Archive, Schmidt, Jr, August E, AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS, *COMPOSITE MATERIALS, *GRAPHITE, *REENTRY VEHICLES, ATMOSPHERE ENTRY, BINDERS, BORON, DOPING, HAFNIUM, HEAT SHIELDS, NOSE CONES, PITCH(MATERIAL), PYROLYTIC GRAPHITE, SHOCK WAVES, TENSILE PROPERTIES

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