Testing Products for ASTM D3528

ASTM D3528 utilizes a double-lap joint configuration to determine the tensile shear strength of adhesives. This method is technically superior to the more common ASTM D1002 single-lap shear because the symmetrical geometry virtually eliminates the eccentric loading and peel components that plague single-overlap specimens. By balancing the load across two shear planes, the adhesive is subjected to nearly pure shear stress. For engineering professionals, this provides a more accurate Allowable Shear Stress value for design. Our Newton-Series hardware ensures that the 1.27 mm/min crosshead speed remains perfectly linear; any velocity fluctuations during the elastic-to-plastic transition of the adhesive can cause premature bond failure or misleading data regarding cohesive vs. adhesive failure modes.