LIFETIME OF GFRP IN A SHEAR WEB AND IN THE GIRDER OF A SAILPLANE WING SPAR

Authors

  • Christoph Kensche Presented at the XXVI OSTIV Congress L999, Bayteuth, Germany

Keywords:

Structures, Materials, Design

Abstract

Comparative lifetime predictions are Presented for GFRP materials representing the girdec also known as flange or cap, and shear web of a sailplne wing spar. They were accomplished on the basis of the specific s-n curves and the sailplane standard of KoSMOS by applying the linear Palmgren-Miner rule. For this purpose, a lifetime prediction program was developed. For the spar caps, s-n curves or a constant amplitude life diagram of unidirectional glass epoxy (UD GI-Ep) respectively, established for wind turbine rotor blades were used. For the shear webs, fatigue data of torsion-loaded +/-45' orientated Gl-Ep-fabric tubes were created at R=0.1, and R=-1, for the design of a constant amplitude life diagram.

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Issue

Vol. 26 No. 2 (2002)

Section

Articles

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