150 



TABLE 1 



Observed Changes in the Dimensions of the Diaphragm 

 and the Calculated Strains 



10' X 50 



0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 



Octohedrol Shearing Stroin y 



Figure 6 - Octahedral Shearing Stress-Strain Curve 

 Based on a Tensile Test of a Standard Specimen 



The volume of material in each of these eleven regions and the cor- 

 responding values of y and ^Irdy, the energy per unit volume, are listed in 

 Table 2, together with the product of volume and energy per unit voliime. The 

 summation of this product gives the total energy absorbed by the diaphragm. 

 This summation yields a value of 392,000 inch-pounds as compared to 385,000 

 inch-pounds as calculated from the observed pressures and measured changes in 

 volume. 



