After deformation. Compare smooth outer surface to bumpy surface of 635--another obvious sign of GSS creep behavior.
Ice636: 50:50 ice I mix = 3x P drop f.g. ice:standard ice I
| T = 210 K, P = 100 MPa, s = 5 MPa | step (1), (3) |
| T = 210 K, P = 100 MPa, s = 8.2 MPa | step (2), (4) |
| Back to Ice635 |
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After deformation. Compare smooth outer surface to bumpy surface of 635--another obvious sign of GSS creep behavior. |
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: V0.025 = 2.3e-7/s = 2%/day. Load to stress translation for ice636 is 0.272 MPa/mV, with a ~5 mV zero offset. Horizontal scale is time. 5000≈14 hrs. |
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e=0.246 | 1324 hrs 1/18/11. End of run. (No idea what that tiny tilt upward in udot is.) | |
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e=0.231 | 0609 hrs 1/18/11. Note slowly but steadily decreasing V in steps (2) and (4) vs (1) and (3), probably just reflecting constant edot as the sample shortens. | |
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e=0.215 | 2231 hrs. Another LN warming incident, this one a 4 K rise and back over ~ 2 hrs, so not as bad as the one on 1/15. This one was probably a defective tank. Recovery was smooth, and edot returned to where it was. Details in the log file above. | |
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0.186 | 1005 hrs. End step (3) | |
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e=0.185 | 0622 hrs 1/17/11. | |
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e=0.176 | 2147 hrs | |
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e=0.173 | 1809 hrs. End step (2). No zero check, drop straight to step (3) stress. | |
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e=0.142 | 0706 hrs 1/16/11. | |
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e=0.105 | 1803 hrs. Steady state edot achieved rapidly, n = 2 almost exactly, so even tho 50:50 mix, rheological action looks like pure GSS. | |
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e=0.089 | 1241 hrs. End step (1). Unloaded force gage check again gives very nice answer, down only 0.2 mV to ~4.5 mV. | |
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same, coarse scale | ||
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e=0.084 | 0658 hrs 1/15. Mildly serious T incident: Tank change monkey neglected to open the liquid valve on new tank. Caught the error at 2120 hrs, blast LN immediately, piston T topped out at 216.0 K 10 mins later, was back down to 210 K by 2200 hrs, stress returned to original level a few hours after that. Max udot was V0.10; e intervals at left suggest extra strain was about 0.004. | |
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e=0.068 | 1756 hrs 1/14 | |
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e=0.056 | ||
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e=0.042 | 1635 hrs 1/13. End of step (1a). Zero check of s gage is excellent: unloaded value dropped by only 0.3 mV (<0.1 MPa) over 2 days. | |
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e=0.029 | ||
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e=0.014 | 1949 hrs 1/12. Again strain rate falls below 2%/day; increase stress to 5.2 MPa. | |
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e=0.011 | ||
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e=0.0083 | Strain rate falls below 2%/day; increase stress to 4 MPa. | |
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e=0.0059 | 1312 hrs | |
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e=0.0046 | ||
 1000 hrs.png) |
e=0.0036 | New and better, viewing. How do you like it? 1000 hrs 1/12/11 |
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