Study on the Mechanical Properties of Metal Rubber Inner Core of O-Type Seal with Large Ring-to-Diameter Ratio

Table 2

Change of loss factor and energy dissipation with porosity after heat treatment.

Porosity (%)	Loss factor (room temperature, heat treatment) η	Energy dissipation (room temperature, heat treatment)
51.5	0.26442, 0.21857	0.05371, 0.03574
57.6	0.27501, 0.19054	0.06469, 0.03234
63.7	0.30210, 0.18699	0.06688, 0.01979
69.7	0.32120, 0.14297	0.06893, 0.01519