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Erschienen in: Applied Composite Materials 6/2017

02.02.2017

An Experimental Study of the Influence of in-Plane Fiber Waviness on Unidirectional Laminates Tensile Properties

verfasst von: Cong Zhao, Jun Xiao, Yong Li, Qiyi Chu, Ting Xu, Bendong Wang

Erschienen in: Applied Composite Materials | Ausgabe 6/2017

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Abstract

As one of the most common process induced defects of automated fiber placement, in-plane fiber waviness and its influences on mechanical properties of fiber reinforced composite lack experimental studies. In this paper, a new approach to prepare the test specimen with in-plane fiber waviness is proposed in consideration of the mismatch between the current test standard and actual fiber trajectory. Based on the generation mechanism of in-plane fiber waviness during automated fiber placement, the magnitude of in-plane fiber waviness is characterized by axial compressive strain of prepreg tow. The elastic constants and tensile strength of unidirectional laminates with in-plane fiber waviness are calculated by off-axis and maximum stress theory. Experimental results show that the tensile properties infade dramatically with increasing magnitude of the waviness, in good agreement with theoretical analyses. When prepreg tow compressive strain reaches 1.2%, the longitudinal tensile modulus and strength of unidirectional laminate decreased by 25.5% and 57.7%, respectively.

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Metadaten
Titel
An Experimental Study of the Influence of in-Plane Fiber Waviness on Unidirectional Laminates Tensile Properties
verfasst von
Cong Zhao
Jun Xiao
Yong Li
Qiyi Chu
Ting Xu
Bendong Wang
Publikationsdatum
02.02.2017
Verlag
Springer Netherlands
Erschienen in
Applied Composite Materials / Ausgabe 6/2017
Print ISSN: 0929-189X
Elektronische ISSN: 1573-4897
DOI
https://doi.org/10.1007/s10443-017-9590-z

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