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Figure 20.1Method for manual assessment of heel counter stiffness. -
Figure 20.2Method for manual assessment of flexion stiffness. -
Figure 20.3Method for manual assessment of torsional stiffness showing inversion of forefoot. -
Figure 20.4Method for manual assessment of torsional stiffness showing twist through length of the shoe. -
Figure 20.5Setup for heel counter stiffness test rig showing first clamp in throat of shoe to maintain stability and second clamp with trigger grip providing compression through force gauge. -
Figure 20.6Alignment of soft-faced at posterior aspect of heel counter. -
Figure 20.7Flexion stiffness test rig setup showing restraining clamp acting through truncated last and hinged platform with inclinometer. -
Figure 20.8Torsional stiffness test rig setup showing front platform with central axis of rotation. -
Figure 20.9Torsional stiffness test rig setup showing clamp to grip heel and restraining strap for front platform. Note that the shoe is located according to 30% and 66% marks. -
Figure 20.10Example of heel counter stiffness curves obtained for a group of five school shoes. -
Figure 20.11Example of flexion stiffness curves obtained for a group of five school shoes. -
Figure 20.12Example of torsional stiffness curves obtained for a group of five school shoes. -
Figure 20.13Design concept for an integrated, stand-alone test rig showing main clamping mechanism and flexion test mechanism. -
Figure 20.14Design concept for an integrated, stand-alone test rig showing torsion test mechanism. -
Figure 20.15Design concept for an integrated, stand-alone test rig showing heel counter test mechanism.
