Rigid-body Off-axis Ordnance Shock/Tail-slap Environment Replicator (ROOSTER)

ABSTRACT:The objective of this project is to develop ordnance shock/tail-slap environment replicator machines that can applying high acceleration/deceleration pulses of over 10,000 g peak over long durations of over 5 msec. The proposal describes two novel classes of shock/tail-slap testing machine concepts for feasibility study. The first novel class of multi-axial shock/tail-slap replicator machines can apply acceleration/deceleration pulses with over 10,000 g peak and around 0.1 msec duration over periods of well over 5 msec. The machines can apply multi-axial shock loading pulses to the ordnance in the axial and lateral directions to simulate almost any shock loading event, including the tail-slap shocks, where large lateral accelerations are introduced due to the bending and rebound of the ordnance in the lateral direction. The second novel class of shock/tail-slap testing machine concepts can achieve high and long duration shock loading to simulate target penetration with the capability of simultaneously applying relatively short duration lateral shock loading to replicate tail-slap shock loading events caused by lateral accelerations that are introduced due to the bending and rebound of the ordnance in the lateral direction. Both concepts provide multi-axial shock testing machines for low-cost, highly repeatable and reusable testing of ordnance.BENEFIT:Although the present shock testing machines are to be developed for specific needs of testing ordnance of various types under various launch and target interaction environments, a technology that can reliably replicate various shock loading events and is highly repeatable, has numerous commercial applications, particularly when tests are at a relatively inexpensive cost. For example, such shock testing machines, designed for testing the effects of acceleration/deceleration events experienced by packaged electronics, instrumentations and various components used in aerospace and various vehicles and appliances that are prone to be dropped and the like will have a wide range of commercial applications. Such machines are particularly useful for product designers since the product to be tested can be readily instrumented and its response and behavior videoed for analysis of determination of performance as well as possible modes of failure.