Experimental Investigation of Strength of Curved Beam by Thin Ply Non-Crimp Fabric Laminates

Date

2016-06-09

Author

Arca, M. A.
PAPİLA, MELİH
Çöker, Demirkan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

304
views

0
downloads

Resistance against delamination failure and through the thickness tensile properties of curved carbon fiber reinforced plastics composites are investigated experimentally by conducting the curved beam strength tests. Effect of novel material thin ply non crimp fabric (NCF) architecture on delamination resistance of carbon fiber reinforced composites are investigated and compare with that of standard UD layups. In order to determine through the thickness tensile properties of curved carbon fiber composites, standard test method is carried out, namely four-point bending tests. The dynamic delamination propagation and failure sequences under curved beam bending is captured using Photron© Fastcam SA5 ultra high speed system. For the non-crimp fabric configuration an increase in the curved beam strength is observed in comparison with [0] and [0/45/-45/0] laminates by unidirectional (UD) tape material. For the UD tape, the initial defects caused by the out-of-autoclave manufacturing process is found to be the potential failure sites. The test results and observations suggest that thin-ply NCF is much less vulnerable to the existence of manufacturing voids in contrast to standard thickness UD tape. Finally, TPNCF is shown to have superior properties in regard to delamination resistance and curved-beam strength.

Subject Keywords

Curved beam strength, High-speed camera, Thin-ply non-crimp fabric, Delamination Curved composite, Curved composite

URI

https://hdl.handle.net/11511/35581

DOI

https://doi.org/10.1007/978-3-319-42195-7_6

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Experimental investigation of the effect of CNT addition on the strength of CFRP curved composite beams Arca, M.A.; Uyar, I.; Çöker, Demirkan (2015-01-01) Carbon nanotubes (CNT) have been attracting attention as a toughening material in composite matrix due to their excellent mechanical properties. However, superior properties of CNTs have not yet been realized in the strengthening of composites against fracture. This study focuses on investigating the effect of CNT variation in the epoxy resin on the strength of curved composite beams. Specimens are [0/90] fabric carbon/epoxy composite laminates manufactured by hand layup technique 3 % wt CNT fractions in th...
Experimental Observations of Dynamic Delamination in Curved [0] and [0/90] Composite Laminates Uyar, Imren; Arca, Miray; Gozluklu, Burak; Çöker, Demirkan (null, Springer, 2015-01-01) Curved composite parts are increasingly replacing metal ribs and box structures in recent civil aerospace structures and wind turbine blades. Delamination of L-shaped composite laminates occurs by interlaminar opening stresses in addition to the interlaminar shear stresses at the curved region. An experimental setup is designed to investigate dynamic delamination in L-shaped composite brackets under quasi static shear loading. The materials are unidirectional [0]17and cross-ply [0/90]17 epoxy/graphite compo...
Experimental Observations of Dynamic Delamination in Curved [0] and [0/90] Composite Laminates Uyar, İmren; Arca, Miray; Gozluklu, Burak; Çöker, Demirkan (2015-01-01) Curved composite parts are increasingly replacing metal ribs and box structures in recent civil aerospace structures and wind turbine blades. Delamination of L-shaped composite laminates occurs by interlaminar opening stresses in addition to the interlaminar shear stresses at the curved region. An experimental setup is designed to investigate dynamic delamination in L-shaped composite brackets under quasi static shear loading. The materials are unidirectional [0]17and cross-ply [0/90]17 epoxy/graphite compo...
Experimental investigation of failure mechanism in cross-ply and fabric curved composite laminates Çevik, Ahmet; Çöker, Demirkan; Department of Aerospace Engineering (2021-8) Laminated curved-shape composite parts which are used in the spar and ribs in aircraft and wind turbine blades are subjected to high interlaminar tensile and shear stresses. These stresses cause delamination and subsequent reduction in load-carrying capacity. In this study, failure mechanism of cross-ply and fabric curved composite laminates under pure transverse loading are examined experimentally using an in-house designed test fixture. Stress field over the curved beam is obtained with finite element ana...
Simulation of crystallization and glass formation processes for binary Pd-Ag metal alloys Kart, HH; Uludogan, M; Cagin, T; Tomak, Mehmet (2003-09-12) Glass formation and crystallization process of Pd-Ag metallic alloys are investigated by means of molecular dynamics simulation. This simulation uses the quantum Sutton-Chen (Q-SC) potential to study structural and transport properties of Pd-Ag alloys. Cooling rates and concentration effects on the glass formation and crystallization of binary alloys considered in this work are investigated. Pd-Ag alloys show the glass structure at fast cooling rates while it crystallizes at slow cooling rates. Increment of...

Citation Formats

M. A. Arca, M. PAPİLA, and D. Çöker, “Experimental Investigation of Strength of Curved Beam by Thin Ply Non-Crimp Fabric Laminates,” 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35581.