Load cycle

If the cycle has a short-time rating, with a period of energization and one of rest, the motor will obviously cool during the de-energizing period, and depending upon the peak load and tlie rest periods, a comparatively lower output motor can perform duties at higher loads. The equivalent output for the load cycle of Figure 3.16 is... 

A switching sequence that can be employed for a particular load cycle may be one of the following ... 

Find the minimum pressure to which the vessel must be tested before use to guarantee against failure in under the 3000 load cycles. 

If the change in stress is continuous rather than a step function then equation (2.55) may be generalised further to take into account a continuous loading cycle. So... 

Example 2.16 Analysis of the creep curves given in Fig. 2.51 shows that they can be represented by an equation of the form e(t) = Aat" where the constants n = 0.083 and A = 0.0486. A component made from this material is subjected to a loading pattern in which a stress of 10.5 MN/m is applied for 1(X) hours and then completely removed. Estimate (a) the residual strain in the material 100 hours after the stress has been removed, (b) the total creep strain after the 5th loading cycle in which the stress has been applied for 100 hours and removed for 100 hours in each cycle and (c) the residual strain after KKX) cycles of the type described in (b). 

Arrestance, initial The arrestance value recorded during the first loading cycle in a filtet test. 

High yields are possible due to the large capacity of the ChiraLig for the single enantiomer on each load cycle. A significant percentage of the available binding sites are used in each cycle to bind the eutomer. 

Figure 15.21 Daily load cycle for a rural development project...

Examples of fatigue curves for unreinforced (top) and reinforced (bottom) plastics are shown in Fig. 2-44. The values for stress amplitude and the number of load cycles to failure are plotted on a diagram with logarithmically divided abscissa and English or metrically divided ordinates. 

Load amplitude One-half of the algebraic difference between the maximum and minimum loads in the load cycle. 

Let us analyse the above data on the basis of Lawn and Howes analysis 29). Based on the mechanics of hardness identation - assuming the loading cycle to be elastic-plastic and unloading to be elastic — these authors have recently derived an interesting expression of the residual impression parameter (relative depth recovery) as function of the ratio MH/E. Accordingly ... 

Initial activity is important to ensure fast unloading and loading cycles. The second requirement for repeated use of alanate batteries is long-term stability. Whereas titanium colloids show superior performance in terms of decomposition kinetics, titanium nitride-based materials are superior in long-term stability. The latter can be seen comparing both catalytic materials in several runs (Fig. 19.8). 

Loading, of fillers, 11 305-306 Loading amplitudes, fatigue and, 14 450 Loading cycles, 13 482 Loading Ratio Correlation (LRC) Method, 1 626, 628... 

The lifetime of advanced composite components for use in aircraft is governed primarily by allowable deformation or by fatigue. The fatigue behaviour has been the subject of many years testing by the aircraft companies, generating empirical load-cycle curves for many combinations of fibre, matrix and orientation. Humidity ingress (diffusion... 

Figure 4.122 displays examples of SN curves for two grades, with the maximum stress in traction/compression at 30 Hz frequency versus the number of loading cycles. 

Figure 4.122. Polyimide two examples ofSN curves maximum stress (MPa) versus loading cycle number...

Polymers used as dental materials must meet several stringent requirements. Dental restorative materials must be nontoxic, have aesthetic appearance, and good adhesive and mechanical properties. In addition, these materials must exhibit long term stability in the presence of water, enzymes, and various oral fluids, and withstand thermal and load cycles. Finally, a desirable dental restorative materia] should be convenient to work with at the time of application. 

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