Damage mode identification in transverse crack tension specimens using acoustic emission and correlation with finite element progressive damage model

Oz, Fatih E.; Ahmadvashaghbash, Sina; Ersoy, Nuri

Abstract

© 2018 Elsevier Ltd In this study, damage progression in unidirectional composite specimens is investigated. Transverse Crack Tension specimens are used to stimulate damage in a predetermined progressive sequence. Acoustic Emission (AE) registration technique and its location detection capability is used to identify and locate the damage modes during the tension tests. The k-means++ algorithm is applied to cluster similar AE events and obtain reliable correlations between the damage modes and AE characteristics. Damage modes at the end of interrupted tests are identified under an optical microscope and correlated with locations of AE clusters. It is seen that matrix cracks have high amplitude and duration, whereas delaminations have low amplitude and mid-duration, and fibre breaks have high average frequency characteristics. A finite element analysis was performed to predict the progressive failure behaviour including intralaminar failure and delaminations. The correlations between the AE clusters and damage modes are validated with the finite element model.

• Journal Article Type: Article
• Acceptance Date: Nov 25, 2018
• Online Publication Date: Nov 26, 2018
• Publication Date: May 15, 2019
• Deposit Date: Jan 24, 2019
• Publicly Available Date: Nov 27, 2019
• Journal: Composites Part B: Engineering
• Print ISSN: 1359-8368
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 165
• Pages: 84-95
• DOI: https://doi.org/10.1016/j.compositesb.2018.11.104
• Keywords: polymer-matrix composites (PMC), transverse cracking, acoustic emission, finite element analysis (FEA)
• Public URL: https://uwe-repository.worktribe.com/output/846920
• Publisher URL: http://doi.org/10.1016/j.compositesb.2018.11.104
• Additional Information: Additional Information : This is the author's accepted manuscript. The final published version is available here: http://doi.org/10.1016/j.compositesb.2018.11.104
• Contract Date: Jan 24, 2019