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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.
Test frame, double cantilever beam test fixture.