ACOUSTIC EMISSION AND ULTRASONICS ON ADHESIVE JOINTS

Acousto-ultrasonic technique was used to discern among different types of E glass-epoxy adhesive joints and tapered laminates, produced by a handmade procedure.

Results obtained showed:

Influence on mechanical behaviour of the repeated application of shear stresses up to 30-50-70 % of ultimate load.

Acoustic emission (AE) measured irreversible damage via Felicity ratio.

Signal characteristics were widely modified from the different level of stress reached in the test: an analysis of AE amplitude distributions was performed.

An analysis of the modification of the performance of three different neural networks on the recognition of joint types was also carried out

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