Displacement curves contact diameter

Figure 6. Contact diameter and contact deformation displacement curves.

Typical plots of the variation of contact diameter and displacement in compression for increasing and decreasing loads for one of the polymers investigated are shown in Figure 6 together with theoretical curves calculated with the well known Hertzian formulas ... 

Tack adhesion measurements were made by curing the polybutadiene gel in a thin film ( 0.5 mm thick) on a plate. A stainless steel probe (8 mm diameter) was brought into contact with the gel film and held for 60 s at a force of 500 g. The probe was pulled away from the gel film at a rate of 0.002 mm/s, while measuring the force-displacement curve. The temperature for the tack measurement was held constant utilizing an environmental chamber. The sample... 

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