caa a22 4500 60617303X CHVBK 20210128100731.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10921-015-0306-8 doi (NATIONALLICENCE)springer-10.1007/s10921-015-0306-8 Acoustic Emission Characterisation of Failure Modes in Hemp/Epoxy and Glass/Epoxy Composite Laminates [Elektronische Daten] [C. Kumar, V. Arumugam, S. Sajith, H. Dhakal, Risil John] Acoustic emission (AE) can be used for online monitoring of composite structures. One of the main issues of using composite structures in various applications is to understand and characterize their failure mechanisms. In this paper, advanced signal processing technique is used to discriminate the failure mechanisms in hemp/epoxy and glass/epoxy composite laminates. Hemp/Epoxy laminates are made from 4 layers of chopped non-woven fiber mats and glass/epoxy cross ply laminates [0/90/90/0] $$_{3s}$$ 3 s are made from 12 layers of unidirectional glass fiber mats. ASTM standard specimens of size 100 $$\times $$ × 20 $$\times $$ × 4 mm were cut from the laminates. These specimens are subjected to flexural loading with AE monitoring. The choice of the AE signals for failure mode characterisation were obtained using parametric analysis of AE data such as counts rate and cumulative counts at different levels of loading. Wavelet decomposition was performed on the chosen AE signals to identify the percentage of energy and frequency content of each level which correlate the different failure modes. The studies reveal that wavelet decomposition of AE signals plays a significant role in discriminating the dominance of the different failure modes with respect to the different stages of loading. Springer Science+Business Media New York, 2015 Polymers nationallicence Hemp fiber composites nationallicence Acoustic emission nationallicence Wavelet analysis nationallicence Delamination nationallicence Failure modes nationallicence Kumar C. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut Arumugam V. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut Sajith S. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut Dhakal H. Advanced Polymer and Composites (APC) Research Group, School of Engineering, University of Portsmouth, Anglesea Road, Anglesea Building, PO1 3DJ, Portsmouth, Hampshire, UK aut John Risil Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-11 0195-9298 34:4<1 2015 34 10921 https://doi.org/10.1007/s10921-015-0306-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-015-0306-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kumar C. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut NATIONALLICENCE 700 1- Arumugam V. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut NATIONALLICENCE 700 1- Sajith S. Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut NATIONALLICENCE 700 1- Dhakal H. Advanced Polymer and Composites (APC) Research Group, School of Engineering, University of Portsmouth, Anglesea Road, Anglesea Building, PO1 3DJ, Portsmouth, Hampshire, UK aut NATIONALLICENCE 700 1- John Risil Department of Aerospace Engineering, Anna University, MIT Campus, Chromepet, 600 044, Chennai, Tamil Nadu, India aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-11 0195-9298 34:4<1 2015 34 10921