Laser Shearography and Ultrasound Inspection of Composite Laminates with Overlapping Fiber Plies
Conference: Publication Date: 1 April 2019Testing Method: ,
When manufacturing or repairing structures with composite laminate materials, internal features of overlapping fiber
plies and ply orientation misplacement can occur. These composite processing steps will influence material
characteristics of the component and likely change the inspection results. As part of the quality assurance process,
nondestructive evaluation methods are needed for inspecting laminated composites to ensure the materials are
undamaged and meet the design parameters required for the structure’s intended application. The present study
considers laser shearography and roller probe ultrasound techniques for inspecting laminated composites with
overlapping fiber plies. The samples used in this study were designed and manufactured such that two different
laminate thicknesses and three designs of overlapping fiber plies were considered. Each of the samples was
manufactured using an 8-harness satin carbon fiber weave fabric and a thermoset resin. The benefits and limitations
of using these two nondestructive inspection methods for assessing carbon fiber reinforced laminated composites
with internal ply overlaps will be presented.
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