Ice770: std ice; Seidemann/Prior stress drop study

T = 240 K, P = 50 MPa, s = 13.4 MPa to e = 0.15 step (1)
T = 240 K, P = 50 MPa, s = 3 MPa to e = 0.24 step (2)

 

Legend: Upper graph of each pair is motor speed V (proportional to edot); lower graph is load (in volts). Translate motor V to edot thus: V1.00 ≈ 6e-6/s ≈ 2%/hr. Load to stress translation for ice767 is roughly ____ MPa/mV, with a __ mV zero offset. Horizontal scale is time. 5000 ≈ 14 hrs.

     
e = 0.234

 

Near end of run.

 

7/17/14 0917 hrs

e = 0.200

 

 

 

 

7/24/14 32310 hrs

e = 0.161

 

 

Must be well into step (2) at this point.

 

7/16/14 1215 hrs