Interlaminar Fracture Toughness by Double Cantilever Beam Method

This method determines the interlaminar fracture toughness of a material by applying a constant tensile force to a bond to induce a crack.  The surfaces are pulled apart without sliding or shearing.

After appropriately conditioning and machining the specimens, a specimen is placed into the fixture and the machine begins to separate the specimen by pulling apart at the crack opening to a pre-specified distance.  The machine then returns to the zero extension point so that a calculation can be performed for the area within the curve produced.

Interlaminar toughness

Equipment Used:
Test frame, double cantilever beam test fixture