697170.fig.0011a
(a)
697170.fig.0011b
(b)
697170.fig.0011c
(c)
Figure 11: Schematics of (a) the top view of a cross-tension specimen, (b) the cross-sections along the horizontal (marked by H) and transverse (marked by T) symmetry planes of the spot friction weld, respectively, and (c) the failure modes of spot friction welds under different loading conditions [60].