THE APPLICATION OF A NEW STRUCTURAL INDEX TO COMPARE TITANIUM ALLOYS WITH OTHER MATERIALS IN AIRFRAMES STRUCTURES

摘要

The evaluation of structural materials for airframes is based on the strength/density ratio or, more precisely, the ultimate strength/density ratio, the compressive yield strength/density ratio, and the structural indices for plates and columns.nThe application of this relationship to complex sections depends on the weighted average of the various plate elements that constitute the section and on the proper selection of their end fixities. Past experience indicates that this method is often unreliable and does not predict the failing load of the section, since the formula predicts only the stress at which the first buckle occurs in each respective element.