Evaluation of Interfacial Strength with Indentation Test by Using a Wedge Shape Indenter in Resin/Metal Dissimilar Materials Laser Welded Joint

Abstract

Interfacial strength of dissimilar materials laser welded joint between SUS304 and PET was evaluated with indentation test. In the test, a wedge shape indenter was inserted into a groove machined at the interface. Initiation and propagation behavior of interfacial crack was observed during indentation test. Interfacial crack was successfully introduced with indentation test by using a wedge shape indenter. The crack length increased with increase in indentation load. Distribution of interfacial strength in welded region might be continuously measured in one time by the indentation test. Fracture toughness was calculated as interfacial strength.