Shock Mitigation Analysis Using Recycled Composites for Application to Guided Projectiles
Final rept. Mar-Sep 2012
OAK RIDGE INST FOR SCIENCE AND EDUCATION BELCAMP MD
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Accurately, quickly, and cheaply simulating a gun launch to detect mechanical faults in projectiles is a challenge in the Weapons and Materials Research Directorate s Lethality Division. Currently, the most accurate method is to machine the rounds, fire them, and record the structural failures of the round. A cheaper but less accurate method is to put rounds or parts in an air gun and fire it to record the same properties. However, despite the advantages of the air gun, both methods are expensive and time consuming. The cheapest and quickest technique of testing parts is to put them in a high-acceleration impact table. This machine induces a peak acceleration similar to that which is encountered in a gun launch, but the overall event is shorter. The acceleration and duration can be changed by using different amounts and types of padding on the shock table. There are many different types of materials with properties that could offer a solution to finding a more accurate acceleration profile. The goal of the experiments detailed in this report was to determine if recycled cardboard could produce a more realistic shock simulation than the felt material currently used. Creating a more accurate simulation will contribute to the overall goal of finding structural design faults in guided projectile components.