Read the following statement regarding the influence of stress amplitude on the fatigue life of a metal material and indicate if it is True or False. Decreasing the stress amplitude while maintaining the mean stress means that less work or energy is applied to the structure, and thus less damage is caused resulting in a longer fatigue life.

Project 2: Table 3 & 4 shows the fatigue data for two different materials to be used for an automobile rotating parts at an average rotational speed of 750 revolutions per minute: Stress in Mpa 170 148 130 114 92 80 74 Table 3: Summary of fatigue data part 1 Number of cycles 37000 100000 300000 1000000 10000000 100000000 1000000000

Research or journal about Failure of Materials Due to Creep and Fatigue. Please include the reference, Range of year from 2000 to 2022!

Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface cra of length 0.5 mm and having a tip radius of curvature of 0.005 mm, when a stress of 1040MPa is applied. Your answer must be in GPa. Write your answer to 1 decimal place. Answer: V 30 (0) 00 a W 4340 steel alloy. Determine the ductile to brittle transition