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frequency sweep
Fatigue crack growth rate test using a frequency sweep method
      
Fatigue crack propagation characteristics of a diesel engine crankshaft are studied by measuring the fatigue crack growth rate using a frequency sweep method on a resonant fatigue test rig.
      
A novel criterion for the thermorheologically simple material, and a procedure to calculate the shift factor from the angular frequency sweep and temperature ramp data were presented.
      
Various dynamic mechanical tests (strain sweep, frequency sweep, and time sweep) were performed to estimate viscoelastic characteristics and fatigue behavior.
      
Active head oscillations were performed at four discrete frequencies (0.12, 0.32, 0.80, 2.0 Hz) and over a frequency sweep between 0.1 and 2.0 Hz.
      
Three measures of responding were calculated; the frequency at which responding was 50% of the maximum (M50), the asymptotic response rate and the total area under the curve (AUC) for each frequency sweep.
      
Frequency sweep measurements within the linear-viscoelastic region at γ = 0.001 leads to the assumption that all rehydrated samples are dispersions.
      
Mean duty cycle was longer in flight, and the bandwidths and frequency sweep rates of the FM segments in the calls increased in comparison with perched bats.
      
The frequency sweep arises from the refractive-index contribution of the time-dependent electron density in the exciting discharge plasma.
      
The frequencies emitted depend on the queens' age, and the tooting syllables contain a frequency sweep.
      
The cross-linking mechanisms are confirmed by the Cox-Merz rule and dynamic frequency sweep tests, which result in an average lifetime of junction points of the order of 17?ms.
      
Each data point in a cyclic frequency sweep (CFS) was taken at a different state of the material; the data were interpolated using an interactive computer program.
      
Time and frequency sweep procedures were carried out using the stress-controlled rheometer Haake RS 150.
      
Frequency sweep data, obtained at increasing times during the whole hardening process, were plotted to the generalized Cole and Cole behavior model and the corresponding mechanical spectra were drawn.
      
Frequency sweep tests in the linear domain revealed a gel-like structure with a nearly constant G' for the suspending fluid and a slightly increasing G' for the solder paste.
      
The two classes are characterized by their frequency sweep profiles, viscoelastic linear domains, scaling laws of the elastic shear modulus vs concentration, kinetics of formation of the networks, and their optical birefringence aspects.
      
The frequency sweep, step shear strain and shear stress growth experiments were carried out for the blends.
      
In other words, frequency sweep experiments are not made at constant shear stress.
      
? Background: We compared the visual acuities obtained with preferential looking (PL), the most widely used method of pediatric vision assessment, with those obtained with the spatial frequency sweep pattern-reversal visual evoked response (SPVER).
      
Comparison of Snellen acuity and objective assessment using the spatial frequency sweep PVER
      
 

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