Activity 3: it is generally accepted that material properties differ from theoretical predicted values and that these properties degrade with time and loading conditions. Your line manager has presented you with practical results of tests for two materials, rubber and ceramics, you are required to analyse these results and report on your findings by completing task 3. Task 3 a] Figure 3 shows a stress strain profile for loading and unloading a sample of rubber to test its clastic prop. erties, the theoretical profile is also shown. Load Bonquion Figure 2 - Stress and Strain curves for Rubber Compare the theoretical graph to the practical results; are they similar? What factors would contribute to the difference in results? by Destructive tensile testing on samples of two ceramic fibre composites have been used to determine their ultimate tensile stress (UTS). Sample 1 has been in use for several years (under cyclic loading), Sample 2 has just been freshly manufactured. The test results are shown in the table 1. Test (MPa) Sample 1 94 Sample 2 190 Theoretical Value 210 Table 1 - Results of destructive tensile tests The test shows that Sampled has clearly degraded, discuss the possible caused that would cause this to happen. Sample 2 is also lower than the expected theoretical value, what factors may have contributed to the lower UTS