Uniaxial fatigue behavior of filament-wound glass-fiber/epoxy composite tubes

Date

2001-10-01

Author

Kaynak, Cevdet

Metadata

Show full item record

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

Item Usage Stats

181
views

0
downloads

Filament-wound polymer-matrix composite tubes find uses as pressure vessels, rocket launchers, etc., where internal pressure is the primary constraint. Increasing use of these structural parts has given rise to the need for tests to identify characteristics of their fatigue behavior. The aim of this study was to determine fatigue data, and observe macroscopic and microscopic damage mechanisms of filament-wound composite tubes under axial cyclic loading. For this purpose, fatigue lives of the epoxy matrix, +/- 55 degrees glass fiber-wound specimens are determined for stress levels of 60, 70, and 80% of their tensile strength. Three different frequencies; 0.1, 1, and 10 Hz, were applied at each stress level for the constant amplitude sinusoidal loading with a stress ratio of R = 0.1. Results were evaluated in the form of S-N curves to reveal the effects of stress level and loading frequency on the three stages of fatigue damage. These stages observed were, first craze initiation in the matrix, then craze propagation and densification along the fiber winding direction, and finally breakage in the fibers leading to disintegration. Fatigue lives of the specimens decreased with an increase in the stress level, while they were generally increased by increasing the frequency. (C) 2001 Published by Elsevier Science Ltd. All rights reserved.

Subject Keywords

Filament winding, Uniaxial fatigue loading, S-N curve, Damage mechanism

URI

https://hdl.handle.net/11511/48752

Journal

Composites Science and Technology

DOI

https://doi.org/10.1016/s0266-3538(01)00084-7

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Stiffness requirements for wind girders in open-top cylindrical steel tanks Zeybek, Özer; Topkaya, Cem (2022-07-01) © 2022 Elsevier LtdAboveground cylindrical storage tanks are very thin shell structures which are prone to buckling when subjected to wind pressure. Both external and internal pressures are developed due to wind action, and the magnitudes of the pressures generally vary around the circumference. A wind girder is generally used in open-top cylindrical tanks to increase their resistance against buckling. The wind girder must have adequate strength and stiffness in order to fulfill its function properly. Widel...
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...
Performance prediction of nozzleless solid propellant rocket motors Özer, Ali Can; Özyörük, Yusuf; Department of Aerospace Engineering (2015) Integral rocket ramjet (IRR) type propulsion systems have many advantages over conventional solid rocket motors when used in tactical missile systems. Nozzleless boosters are one of the applicable concept choices for the system [1]. During the design and development phase of solid propellant rocket motors, simulation and prediction of behavior of a given motor by numerical tools is important in terms of decreasing the development duration and costs. The present approach includes performance prediction of no...
Electropolishing of an Fe-Ni-Co Alloy in Acetic Acid-Perchloric Acid Mixture Aksu, Yasemin; ERDOĞAN, METEHAN; Demirci, Gokhan; Karakaya, İshak (2016-06-02) Among Fe-Ni-Co alloys, Kovar (53%Fe-29%Ni-17%Co) designated as ASTM F-15 (1), is a well-known glass-sealing alloy. It is also classified as low–expansion alloy (2). Low expansion is required to avoid internal stresses in applications that involve strong ceramic to metal joining such as in vacuum systems (3-6). Electropolishing is applied to obtain smooth metallic surfaces to gain low outgassing rates from the chamber walls in vacuum applications (7-9). The effects of current density, perchloric acid concent...
Aeroelastic analysis of composite wings and wind turbine blades including geometrical nonlinearity and compressibilty Farsadi, Touraj; Kayran, Altan; Department of Aerospace Engineering (2018) Aeroelastic behaviour of composite wings and wind turbine blades in the incompressible and compressible flow regimes is investigated utilizing a geometrically nonlinear Thin Wall Beam (TWB) theory incorporating non uniform geometric features such as sweep, taper, pretwist, warping inhibition and transverse shear strain. The structural equations of motion are obtained in the most general form based on the kinematic relations governing thin walled beams, including the nonlinear strain displacement relations, ...

Citation Formats

C. Kaynak, “Uniaxial fatigue behavior of filament-wound glass-fiber/epoxy composite tubes,” Composites Science and Technology, pp. 1833–1840, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48752.