Lap Shear

Lap shear tests are suitable for comparative test on laminate adhesives, e.g. with film or prepregs, as well as for assessing the bond in a laminate. 

Horizontally adjustable grips are needed to test simple single-lap shear specimens. These can be wedge screw grip, screw or pneumatic versions.  

Slotted single-lap shear specimens can be tested with symmetrically closing grips. The EN and the DIN standard specify a support to prevent bending.  

Double-lap shear specimens can be tested with simple grips. Slotted double-lap shear specimens allow the same grip opening on both sides. 

The result is an in-plane shear strength.