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Research Article

The design of multi-sample flexural fatigue device and fatigue behavior of glass/epoxy laminated composites

H Ersen Balcıoğlu1, Raif Sakin2, Halit GÜN1

1Department of Mechanical Engineering, Faculty of Engineering, Uşak University, Turkey
2Department of Machine and Metal Technologies, Edremit Vocational School of Higher Education, Balıkesir University, Turkey

Keywords

Abstract

Glass/epoxy; 


S-N curves; 


Fixed-end type flexural fatigue;


Multi sample test machine;


Displacement controlled fatigue

Due to fiber reinforced polymer composite materials have a brittle structure, it is important to know their behavior under dynamic loads. Therefore, it is necessary to know the S-N curve that characterizes the fatigue life of the composite material, when selecting and sizing the material. In this study, fatigue behavior of glass/epoxy laminated composites was investigated under flexural loading. For this aim, computer controlled fixed end type flexural fatigue test machine was developed and glass/epoxy test samples were tested under flexural stress corresponding to 80%, 70%, %60, %50, and %40 of the static 3-point bending strength. In addition, the static strengths of the epoxy-laminated composites under tensile, compressive and flexural loads were also determined. It has been observed that the damage such as matrix and fiber cracks and delamination in the glass/epoxy laminated composites, which were exposed to flexural deformation. Also, it has been seen that, the developed fixed end type flexural fatigue test machine can be used to determine fatigue behavior of thin-walled composite materials.

 © 2018 MIM Research Group. All rights reserved.

DOI: http://dx.doi.org/10.17515/resm2018.67me0917                          Full Text

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Last Update:

04.12.2018

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