Preprint Article Version 2 This version is not peer-reviewed

Experimental Investigation of Impact Detection and Damage Extent Quantification

Version 1 : Received: 3 August 2018 / Approved: 4 August 2018 / Online: 4 August 2018 (11:32:55 CEST)
Version 2 : Received: 6 August 2018 / Approved: 7 August 2018 / Online: 7 August 2018 (08:53:04 CEST)
Version 3 : Received: 23 August 2018 / Approved: 24 August 2018 / Online: 24 August 2018 (05:00:39 CEST)

A peer-reviewed article of this Preprint also exists.

Faisal Haider, M.; Migot, A.; Bhuiyan, M.Y.; Giurgiutiu, V. Experimental Investigation of Impact Localization in Composite Plate Using Newly Developed Imaging Method. Inventions 2018, 3, 59. Faisal Haider, M.; Migot, A.; Bhuiyan, M.Y.; Giurgiutiu, V. Experimental Investigation of Impact Localization in Composite Plate Using Newly Developed Imaging Method. Inventions 2018, 3, 59.

Journal reference: Inventions 2018, 3, 59
DOI: 10.3390/inventions3030059

Abstract

This paper focused on impact localization of composite structures, which possess more complexity in the guided wave propagation because of the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to make the plate. A structural health monitoring (SHM) technique is implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There are two types of impact event are considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals are then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detect and localize the impact event on the plate. The experimentally measured impact locations are compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in an immersion tank. Scanning results show that there is no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

Subject Areas

impact localization; composite materials; PPS; imaging method; immersion ultrasonic scanning

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