HIGH ENERGY ABSORBING COMPOSITE STRUCTUREFOR ROTORCRAFT CRASHWORTHINESS

摘要

'Zanchor' effects on energy absorptionefficiencies of a composite structure have beenstudied for improving rotorcraftcrashworthiness. Zanchor is a technology,which has been developed by Mitsubishi HeavyIndustries, Ltd. (MHI) and Shikibo Ltd (Shikibo),to improve composite structure out-of-planestrength by entangled fiber. Zanchor compositetubes were crush tested under static anddynamic conditions. Results have indicated thatZanchor improves the specific energyabsorption and the load uniformity ratio, sinceZanchor increases the average load withoutchanging the initial peak load. Results have alsoindicated that Zanchor enables the ideal load-displacementcurve to be acquired by varyingout-of-plane strength along the crushingdirection. Therefore Zanchor is a suitabletechnology for crashworthy subfloor structuresof rotorcraft.