Minimum failure-time ratio

Figure 3. Generalized design diagram used for structural ceramics showing minimum failure time os. applied structural load. Each curve represents a differed ratio of the proof test load to the service load.

Table 1. The angles of critical failure surface (0 and 9 ), time ratio (t j T) and minimum value of...

Since most time-dependent failures have larger life dispersions, we must consider the maximum and minimum ratios of 4 1 and 40 1. Generally, relative life dispersion increases with the absolute value of MTBF. That is, wear items with a relatively short life expectancy such as rider rings on reciprocating compressors will have a comparatively smaller dispersion than components such as gear tooth flanks, which can be expected to remain serviceable for long periods of time. 

All the previously reported tests were carried out using the same strength dip solutions. The strength of solutions was now varied to determine if the ratio of the two ingredients was important and how important. In a first attempt, zirconium neodecanoate was selected as the metallic organic compound and 4-chlorobenzophenone as the photoactivator. It was discovered the ratio was quite Important as is shown in Figure 2. A minimum or shortest time to failure is clearly shown. Figure 2 shows an example in which the concentration of the additive, zirconium neodecanoate, is held constant while the second additive, 4-chlorobenzophenone, is varied. 

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