Experimental Methods & EquipmentNo Access

INSPECTION OF IMPACT DAMAGE IN HONEYCOMB COMPOSITE BY ESPI, THERMOGRAPHY AND ULTRASONIC TESTING

Safety Metrology Group, Korea Research Institute of Standard and Science, P.O.Box 102, Yuseong Daejeon, 305-600, South Korea

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JEONGHAK PARK

Safety Metrology Group, Korea Research Institute of Standard and Science, Korea

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WONTAE KIM

Department of Bio-Mechanical Engineering, Kongju National University, Yesan Chungnam, 340-702, South Korea

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, and

KISOO KANG

Safety Metrology Group, Korea Research Institute of Standard and Science, Korea

Corresponding author

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https://doi.org/10.1142/S021797920804627XCited by:4 (Source: Crossref)

Abstract

Honeycomb composites are now fairly widely used in civilian and military aircraft structures. Common defects found in these materials are delaminations by impact damage and their presence will lead to structural weaknesses which could lead failure of the airframe structures. It is important to develop effective non-destructive testing procedures to identify these defects and increase the safety of aircraft travel. This paper describes the detection technique of impact damage defect using thermography and ESPI. The results obtained with the two techniques are compared with ultrasonic C-scan testing. The investigation shows that both imaging NDT methods are able to identify the presence of artificial defect and impact damage. The adoption of the thermography allowed significant advantages in inspection condition, and gives smaller error in quantitative estimation of defects.

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