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Abstract                                                                                                                                              

Blades are a crucial element in its overall performance as they significantly influence the efficiency of the system in different uses. Most of them are built using composite laminates made by hand that leads to many kinds of faults, for this there must be an accurate test that gives information on the surface and interior of the blade. The present consideration investigates the ability of ultrasonic, shearographic, and thermographic approaches to find separation defects in blades. Two samples are present, both of which are composed of E-glass fibers reinforced with distinct types of resins - one with polyester resin and the other with epoxy resin, were fabricated each containing multiple Teflon inserts as artificial separation. The Non-Destructive Testing (NDT) under investigation were utilized to perform the necessary inspections on these specimens. Lastly, the effectiveness of each (NDT) technique was evaluated, and a comparison was made to determine their respective capabilities for this particular application.

Key words: Blades- Ultrasonic - non-destructive.