Role of Laminate Thickness on Sequential Dynamic Delamination of Curved [90/0] CFRP Composite Laminates

Date

2016-06-09

Author

Uyar, Imren
Tasdemir, B.
Yavas, D.
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

194
views

0
downloads

In aerospace industry, high demand for the lightweight structures are fostering the use of carbon fiber reinforced polymer composites in a wide variety of shapes, as primary load carrying elements. However, once a composite laminate takes a highly curved shape, such as an L-shape, interlaminar stresses augmented in the curved region cause highly dynamic delamination nucleation and propagation. This paper provides experimental observations of dynamic delamination failure in cross-plied L-shaped composite laminates under quasi-static shear loading for varying laminate thickness. In the experiments, load-displacement curves are recorded and dynamic delamination events areas captured using a million fps high speed camera. In our previous work, two distinct types of failure modes have been identified depending on the laminate layup: (i) formation of multiple delaminations leading two single load drop in its load-displacement curve during the failure of unidirectional laminates, [0](17), and (ii) formation of sequential delaminations associated with each discrete load drop in its load-displacement curve were during the failure of cross-ply laminates, [90/0](17). Accordingly this current study shows that formation of sequential delaminations is independent from the laminate thickness.

Subject Keywords

Delamination, High-speed camera, Dynamic crack growth, L-shaped laminates

URI

https://hdl.handle.net/11511/38260

DOI

https://doi.org/10.1007/978-3-319-42195-7_7

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Experimental Observations of Dynamic Delamination in Curved [0] and [0/90] Composite Laminates Uyar, I.; Arca, M.A.; Gozluklu, B.; 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 Observations of Dynamic Delamination in Curved [0] and [0/90] Composite Laminates Imren, Uyar; Miray, Arca; Burak, Gozluklu; 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...
Effect of welding parameters on the hot cracking behavior of 7039 aluminum - zinc alloy Akkuş, Mert; Gürbüz, Rıza; Batıgün, Caner; Department of Metallurgical and Materials Engineering (2010) 7039 aluminum alloys are widely being used in the aerospace, automotive and defense industries in which welding technique is used for their joining. The main problem encountered during the welding of 7039 aluminum alloy is hot cracking. The aim of this study is to understand the effect of welding parameters on the hot cracking behavior of 7039 aluminum alloy by using Modified Varestraint Test (MVT) with Gas Tunsgten Arc Welding (GTAW) technique. During tests, welding speed was selected as varying parameter,...
Effect of Heat Treatment on Microstructure and Mechanical Properties of Additively Manufactured 18Ni300 Maraging Steels Aydın, İbrahim; Yağmur, Aydın; Tirkeş, Süha; Gür, Cemil Hakan (2021-09-01) Recently, additive manufacturing of maraging steels has gained importance as an alternative to the traditional manufacturing techniques for aerospace components. In this study, various procedures were conducted to find optimum homogenization and aging treatment parameters for 18Ni300 parts that were additively manufactured via Selective Laser Melting (SLM).
EFFECT OF OUT-OF-AUTOCLAVE CURING ON THE BENDING STRENGTH OF TPNCF AND UNIDIRECTIONAL LAMINATES Bozkurt, Mirac Onur; Bilge, Kaan; Papila, Melih; Çöker, Demirkan (null; 2017-09-20) Out-of-autoclave(ooA)treatments in composite manufacturing draw the attention ofmanufacturers anddesigners in aerospace industry by offering numerous advantages over the traditional autoclave processing. Besides, thin ply non crimp fabric (TPNCF) architecture is proven for improved delamination resistance and fracture toughness. The objective of the study is comparingthe bending strength of flat and curved beams of TPNCF [0/45] and Unidirectional (UD)[0/45] aut...

Citation Formats

I. Uyar, B. Tasdemir, D. Yavas, and D. Çöker, “Role of Laminate Thickness on Sequential Dynamic Delamination of Curved [90/0] CFRP Composite Laminates,” 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38260.