TY - JOUR A1 - Trappe, Volker T1 - Fatigue life evaluation of composite wing spar cap materials T2 - Materials Testing N2 - An effective method for evaluating the fatigue strength of thick unidirectional composite laminates of wing spar caps has been presented here. A typical width-tapered bending specimen has been developed for a four-point loading set up. Static and fatigue loading was performed at a load ratio R = -1. The complex stress state has been investigated numerically by finite element analysis. Finally, the concept is proven experimentally on specimens made of pultruded fibre rods. The fatigue behavior of the continuously tapered width by water Jet cutting has been compared to discrete tapering via rod-drop. The new method enables a screening of material fatigue behavior caused by normal and shear loading. PB - Carl Hanser Verlag CY - München KW - Fatigue Testing KW - Pultruded fiber rods KW - CFRP KW - Four-point bending test KW - Spar cap design PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/50090 AN - OPUS4-50090 SN - 0025-5300 VL - 61 IS - 12 SP - 1135 EP - 1139 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany