Ilkay Yavrucuk
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Ilkay Yavrucuk has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
Jonas John
Technical University of Munich
2 shared publicationsLukas Gaugelhofer
Technical University of Munich
2 shared publications- Manfred Hajek
Technical University of Munich, 85748 Munich, Germany
2 shared publications Bulut E. Akmenek
Turkish Aerospace
1 shared publicationGonenc Gursoy
Middle East Technical University
1 shared publication- Zeynep Ünal
Niğde Ömer Halisdemir Üniversitesi
1 shared publication
Latest Publications
- 16 May 2023
- Published by AHS International dba Vertical Flight Society
- p. 1-13
Increasing Damping Properties of Helicopter Composite Substructures using Flax Fiber Hybridization
Helicopter and VTOL structures are heavily influenced by vibrations and complex interaction effects. One possible solution to minimize design risks and to enhance cabin comfort is to increase the damping in the vehicle's structure, for which natural flax fibers offer a promising approach. The presented study investigated the hybridization of conventional composites with flax fibers of sub-structural components, including double-T beams and airfoil structures. The frequency dependent dynamic properties of the structures, damping and stiffness, are measured using experimental modal analysis. Local flax rib reinforcements on shells showed a significant increase in stiffness-damping factor but did not improve damping in flax laminates. According to the investigation, hybridization of conventional composites can lead to a significant increase in damping for both, double-T beams and airfoils. The damping can be increased by three to four times, and there can be a significant improvement in the damping-to-stiffness factor.
- 16 May 2023
- Published by AHS International dba Vertical Flight Society
- p. 1-13
Increasing Damping Properties of Helicopter Composite Substructures using Flax Fiber Hybridization
Helicopter and VTOL structures are heavily influenced by vibrations and complex interaction effects. One possible solution to minimize design risks and to enhance cabin comfort is to increase the damping in the vehicle's structure, for which natural flax fibers offer a promising approach. The presented study investigated the hybridization of conventional composites with flax fibers of sub-structural components, including double-T beams and airfoil structures. The frequency dependent dynamic properties of the structures, damping and stiffness, are measured using experimental modal analysis. Local flax rib reinforcements on shells showed a significant increase in stiffness-damping factor but did not improve damping in flax laminates. According to the investigation, hybridization of conventional composites can lead to a significant increase in damping for both, double-T beams and airfoils. The damping can be increased by three to four times, and there can be a significant improvement in the damping-to-stiffness factor.
- 16 May 2023
- Published by AHS International dba Vertical Flight Society
- p. 1-10
Influence of Temperature and Humidity on Flax Fiber-Reinforced Composites for Helicopter Structures Using Protective Coatings
With the aim of investigating whether sustainable and environmentally friendly flax fiber reinforced composites can meet the high technical requirements of aeronautical structures, this paper presents the influence of temperature and humidity on their structural-mechanical properties using protective coatings. Four coatings, two of which are partially bio-based, are tested on unidirectional flax fibers reinforced with bio-epoxy and polyfurfuryl alcohol resin. To simulate environmental conditions, coated and uncoated test panels are conditioned for two weeks in a climatic chamber at different temperature and humidity levels before their tensile specimens are tested and evaluated for moisture absorption, tensile strength, Young's modulus and fracture strain. The results show that higher temperatures lead to an increased moisture absorption rate and a lower maximum uptake. Higher relative humidity results in an increased maximum moisture uptake. A fossil-based coating could significantly reduce and retard moisture uptake at 30° C and 95 % relative humidity.
- 16 May 2023
- Published by AHS International dba Vertical Flight Society
- p. 1-10
Influence of Temperature and Humidity on Flax Fiber-Reinforced Composites for Helicopter Structures Using Protective Coatings
With the aim of investigating whether sustainable and environmentally friendly flax fiber reinforced composites can meet the high technical requirements of aeronautical structures, this paper presents the influence of temperature and humidity on their structural-mechanical properties using protective coatings. Four coatings, two of which are partially bio-based, are tested on unidirectional flax fibers reinforced with bio-epoxy and polyfurfuryl alcohol resin. To simulate environmental conditions, coated and uncoated test panels are conditioned for two weeks in a climatic chamber at different temperature and humidity levels before their tensile specimens are tested and evaluated for moisture absorption, tensile strength, Young's modulus and fracture strain. The results show that higher temperatures lead to an increased moisture absorption rate and a lower maximum uptake. Higher relative humidity results in an increased maximum moisture uptake. A fossil-based coating could significantly reduce and retard moisture uptake at 30° C and 95 % relative humidity.