Damage detection in composite pipes during mechanical three point bending

Neha Chandarana, Constantinos Soutis, Matthieu Gresil

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Improvements in the design and manufacturing process for composite materials have allowed them to become a cost-effective replacement for metals in structural applications. The cost of inspection, however, continues to represent a large proportion of the life cycle costs of composite components. Since composite materials allow for the integration of sensors, with negligible effect on their mechanical properties, permanent structural health monitoring (SHM) systems have sparked a great deal of interest. The aim of this work was to combine SHM and conventional nondestructive techniques (NDT) to detect and localize the initiation and progression of damage in a tubular specimen during several cycles of flexural loading/unloading. Active infrared thermography (IRT) is used in the reflective mode to scan the specimen between loadings; from this data, thermal diffusivity mappings of the specimen are generated. Two different SHM techniques are used during mechanical loading: (i) acoustic emission (AE) event monitoring using surface mounted piezoelectric sensors, and (ii) distributed strain monitoring using surface mounted optical fibre sensors. Distributed strain data suggests that the loadings are elastic, and residual strains do not appear to be present. The collected AE data suggests significant damage on first glance, however more thorough analysis reveals that the signals are caused primarily by matrix cracking that is damage but not as critical as delamination or fibre breakage.

Original languageEnglish
Title of host publicationStructural Health Monitoring 2017
Subtitle of host publicationReal-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
EditorsFu-Kuo Chang, Fotis Kopsaftopoulos
PublisherDEStech Publications, Inc
Pages1429-1436
Number of pages8
Publication statusPublished - 2017
Externally publishedYes
EventInternational Workshop on Structural Health Monitoring (IWSHM) 2017 - Stanford, United States of America
Duration: 12 Sep 201714 Sep 2017
Conference number: 11th
https://web.stanford.edu/group/sacl/workshop/IWSHM2017/naccommodation2.html

Conference

ConferenceInternational Workshop on Structural Health Monitoring (IWSHM) 2017
Abbreviated titleIWSHM 2017
CountryUnited States of America
CityStanford
Period12/09/1714/09/17
Internet address

Cite this