HIGH SPEED SHEAR TEST DEVICE AND METHOD

摘要

A method of shear testing a ball deposit (19) adhered to a substrate (18) comprises the steps of mounting the substrate (18) on a support (11), relatively rotating the support (11) with respect to a shear tool (15) so as to bring the ball deposit (19) into contact with the shear tool (15), and detecting the shear force at the tool (15) which results from the shear tool (15) shearing the ball deposit (19) off the substrate (18). An apparatus for high speed shear testing of a ball deposit (19) adhered to a substrate (18) comprises a shear tool (15), a relatively rotatable support (11), means to secure a test substrate to the support (11), means to rotate the ball deposit (19) into contact with the shear tool (15) and means to detect the shear force of the tool (15) shearing the ball deposit (19) off the substrate (18).