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The prediction of reliability for rubber O-rings used in the rockets is of great significance for the life assessment of the rockets. In this paper, rubber O-rings were aged under accelerated conditions at temperatures ranging from 60°C to 80°C. And a new model based on Wiener process with a time scale transformation was presented to describe the degradation of CS (compression set) which is the characteristic...
We report on the experimental calibration of the temperature coefficient of frequency (TCf) in single crystal 6H-silicon carbide (SiC) microdisk resonators based on a smartcut technology. We vary the temperature (T) from −32ºC to 125ºC while monitoring the undriven thermomechanical multimode resonances of the devices using sensitive optical motion detection. Both torsional mode and flexural mode resonances...
A number of ITER TF cable-in-conduit samples that have been tested in the SULTAN facility performed significantly below the single strand expectations. Although performance degradation related to transverse electromagnetic loads plays a role in Nb3Sn CICCs, a similar effect can occur when the current in the sample is non-uniformly distributed among the strands, driving part of the strands into saturation...
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