Shear force

Shear is a force that tends to slide one face of the material over an adjacent face. For example,
(i) a rivet holding two plates together is in shear if a tensile force is applied between the plates—as shown in Figure 1.3

(ii) a guillotine cutting sheet metal, or garden shears, each provide a shear force
(iii) a horizontal beam is subject to shear force
(iv) transmission joints on cars are subject to shear forces A shear force can cause a material to bend, slide or twist.