when the aspect ratio
is 0.12, the maximum strain in the SMA wire, eSMA, at 200% shear
strain is 1% for the cross configuration and 11.1% for the straight
configuration. At the same shear strain level, when the aspect ratio
increases to 0.36, the SMA strain in the cross and straight configurations
reaches 8.8% and 27.5%, respectively. Since most of the
SMAs have superelastic strain lower than 6% (Table 3), SMA wires
with the straight configuration cannot operate in a superelastic
range at large shear strain amplitudes, especially in high-aspectratio
elastomeric isolators. Whereas, the cross SMA wires can operate
within an elastic range at large lateral cyclic displacements
(150% and 200% shear strains). This fact demonstrates the effectiveness
of the cross configuration over the straight one.