Scrutinizing interlaminar fatigue loading cycle in composites using acoustic emission technique: Stress ratio influence on damage formation

Journal article (2020)

Authors

R. Ferreira Motta Junior Sao Paulo State University (Unesp), Humaita
R.C. Alderliesten Structural Integrity & Composites - Aerospace Engineering
Marcos Yutaka Shiinoc Sao Paulo State University (Unesp), Humaita
Maria Odila Hilário Cioffia Sao Paulo State University (Unesp), Humaita
Herman Jacobus Cornelis Voorwald Sao Paulo State University (Unesp), Humaita
Research Group
Structural Integrity & Composites (Aerospace Engineering) (TU Delft)
Copyright: © 2020 R. Ferreira Motta Junior, R.C. Alderliesten, Marcos Yutaka Shiinoc, Maria Odila Hilário Cioffia, Herman Jacobus Cornelis Voorwald
DOI: https://doi.org/10.1016/j.compositesa.2020.106065
Fatigue Delamination Acoustic emission Laminates
More Info
expand_more

Published Date

2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Structural Integrity & Composites

Abstract

Current models for delamination propagation prediction in fiber-reinforced polymer (FRP) composites exhibit limitations to explain the physics underlying the mechanisms of damage formation in fatigue. In order to contribute in this field, this research focuses on the study of damage development within a single loading cycle of FRP double cantilever beam specimens under different stress ratios (R). The acoustic emission technique was used to investigate damage propagation. Results showed that under high R-ratios, the load cycle spends an increased time above the threshold energy (Uth). This time difference affects the damage distribution within a single loading cycle. Furthermore, the steady-state delamination propagation was influenced by the R-ratio variation due to the modification of the external work applied to the specimen.