Material design allowables and qualification

Abstract

The material design allowable is a statistically determined minimum value of a material strength property. These values are necessary for the design of aircraft. In the case of Glare, material design values can be obtained through the use of the Metal Volume Fraction. The Metal Volume Fraction (MVF) is the amount of metal present in a Glare sheet. For the different material design allowables there is a (linear) relationship between Glare with a low MVF and a high MVF. The second subject concerns qualification of Glare. Qualification of basic Glare includes qualification of the underlying processes and materials. The qualification of spliced Glare is focussed on the qualification of the details in splice. Using the qualified details any splice layup can be made without having to qualify each splice configuration separately.