Yield strain rupture data

Tables 2-4 show the effect of the dry/cold. moderate, and humid/hot environments on the tensile properties of the adhesive FM 300K tested at the 10 "/s. lO /s. and lO Vs strain rates, respectively. The values of the yield strength, the yield strain, and the offset obtained with the SED method and the corresponding values from the 0.2 % offset method are shown. The tensile strength, rupture strain, and elastic modulus are provided for information. On average, the time to rupture of the specimens tested at the lO /s, lO /s, and lO Vs strain rates were 4 seconds. 6 minutes, and 15 hours, respectively. The data are listed in ascending order of yield strength. The tensile properties listed in parentheses at the bottom of each cell are averages for replicate specimens. For ease of comparison, these averages are summarized in Table 5.

It is possible to summarize the creep data by comparing the times to 1.0% total strain, as a function of stress, in the data shown in Fig. 1.3-16. The reproducibility of creep data for this material is indicated by the separate curves shown in Fig. 13-17. It may be seen that quite good correlation between the creep curves is obtained at the lower stress values. Some scatter in time to rupture occurs at 25,000 psi, a stress which corresponds to the 0.2% offset yield strength at this temperature. Such scatter is to be expected at this high stress level. 

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