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Fatigue life evaluation of composite wing spar cap materials

  • Volker Trappe
Published/Copyright: November 18, 2019
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Materials Testing
From the journal Materials Testing Volume 61 Issue 12

Abstract

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.

*Correspondence Address, Prof. Dr.-Ing. Volker Trappe, BAM-5.3 – FB “Mechanik der Polymerwerkstoffe”, Unter den Eichen 87, 12205 Berlin; Germany, E-mail:

Prof. Dr.-Ing. Dipl.-Phys. Volker Trappe, was born in 1963 in Göttingen. After receiving his Diploma in Physics in 1994 at the Technical University Braunschweig, he was a Scientific Assistant at the Institute for Aircraft Design and Lightweight Structures where he presented his doctoral thesis “Description of the Intralaminar Fatigue Behavior of CFRP with inner State Variables” in 2001. Since then, he has been a collaborator at the Federal Institute of Materials Research and Testing (BAM) in Berlin, Division 5.3 “Mechanics of Polymers”. Since April 2005 he has been an Assistant Lecturer at the Technical University Berlin, and in 2014 he became Honorary Professor for “In-service strength of lightweight structures”.

References

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Published Online: 2019-11-18
Published in Print: 2019-12-02

© 2019, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Mechanical properties of cryogenically treated AA5083 friction stir welds
  5. Fatigue life evaluation of composite wing spar cap materials
  6. Effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis
  7. Optimized random sampling for the load level method in Wöhler tests
  8. Monte Carlo simulation and evaluation of burst strength of pressure vessels
  9. Stress analysis of a Wankel engine eccentric shaft under varied thermal conditions
  10. Effectiveness of Ti micro-alloying for the suppression of Fe impurities in AZ91 Mg alloys and associated corrosion properties
  11. Mechanical properties of hybrid fiber reinforced concrete and a nondestructive evaluation
  12. Multi-objective optimization of an intersecting elliptical pressure hull as a means of buckling pressure maximizing and weight minimization
  13. Preload dependent material properties of lamination stacks for electric machines
  14. Effect of inoculant type and treatment material quantity on properties of vermicular graphite cast iron rail vehicle brake discs
  15. Effects of the chemical treatment of avocado pear wood filler on the properties of LDPE composites
  16. Uncertainty analysis of cutting parameters during grinding based on RSM optimization and Monte Carlo simulation
  17. Applicability of compact tension specimens for evaluation of the plane-strain fracture toughness of steel
https://doi.org/10.3139/120.111431

Articles in the same Issue

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Mechanical properties of cryogenically treated AA5083 friction stir welds
  5. Fatigue life evaluation of composite wing spar cap materials
  6. Effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis
  7. Optimized random sampling for the load level method in Wöhler tests
  8. Monte Carlo simulation and evaluation of burst strength of pressure vessels
  9. Stress analysis of a Wankel engine eccentric shaft under varied thermal conditions
  10. Effectiveness of Ti micro-alloying for the suppression of Fe impurities in AZ91 Mg alloys and associated corrosion properties
  11. Mechanical properties of hybrid fiber reinforced concrete and a nondestructive evaluation
  12. Multi-objective optimization of an intersecting elliptical pressure hull as a means of buckling pressure maximizing and weight minimization
  13. Preload dependent material properties of lamination stacks for electric machines
  14. Effect of inoculant type and treatment material quantity on properties of vermicular graphite cast iron rail vehicle brake discs
  15. Effects of the chemical treatment of avocado pear wood filler on the properties of LDPE composites
  16. Uncertainty analysis of cutting parameters during grinding based on RSM optimization and Monte Carlo simulation
  17. Applicability of compact tension specimens for evaluation of the plane-strain fracture toughness of steel
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