1847. “”Arall”” a Promising Material for Fatigue Critical and Weigh Sensitive Applications

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Paper

B B Benfield: 1847. ”Arall” a Promising Material for Fatigue Critical and Weigh Sensitive Applications. 1988.

 

Abstract

Designing lightweight, fatigue resistant components for aircraft structures is the goal of any good design team. A new family of hybrid materials called ARALL has been developed to provide designers with a tool to achieve such a goal. ARALL is a strong, fatigue and fracture resistant material intended for use in weight sensitive, fatigue critical structures loaded in a predominantly tensile manner. ARALL consists of thin sheets of aluminum bonded together with aramid fiber impregnated adhesive. Combining the aluminum and aramid fibers bestows ARALL with some desirable properties of both. This paper introduces the reader to ARALL?s origin, composition, static material properties, durability, damage tolerance, possible structural applications, and weight impact. A report on a full scale development project of a stiffened ARALL panel is given as an example of ARALLs potential.

 

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