Method for manual assessment of heel counter stiffness.
Figure 20.2
Method for manual assessment of flexion stiffness.
Figure 20.3
Method for manual assessment of torsional stiffness showing inversion of forefoot.
Figure 20.4
Method for manual assessment of torsional stiffness showing twist through length of the shoe.
Figure 20.5
Setup 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 20.6
Alignment of soft-faced at posterior aspect of heel counter.
Figure 20.7
Flexion stiffness test rig setup showing restraining clamp acting through truncated last and hinged platform with inclinometer.
Figure 20.8
Torsional stiffness test rig setup showing front platform with central axis of rotation.
Figure 20.9
Torsional 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 20.10
Example of heel counter stiffness curves obtained for a group of five school shoes.
Figure 20.11
Example of flexion stiffness curves obtained for a group of five school shoes.
Figure 20.12
Example of torsional stiffness curves obtained for a group of five school shoes.
Figure 20.13
Design concept for an integrated, stand-alone test rig showing main clamping mechanism and flexion test mechanism.
Figure 20.14
Design concept for an integrated, stand-alone test rig showing torsion test mechanism.
Figure 20.15
Design concept for an integrated, stand-alone test rig showing heel counter test mechanism.