(b) Assuming different dynamical loadings with the same stress amplitude. Use sketches to demonstrate how the mean stres

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(b) Assuming different dynamical loadings with the same stress amplitude. Use sketches to demonstrate how the mean stres

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B Assuming Different Dynamical Loadings With The Same Stress Amplitude Use Sketches To Demonstrate How The Mean Stres 1
B Assuming Different Dynamical Loadings With The Same Stress Amplitude Use Sketches To Demonstrate How The Mean Stres 1 (34.3 KiB) Viewed 13 times
(b) Assuming different dynamical loadings with the same stress amplitude. Use sketches to demonstrate how the mean stress affects the S-N curve of the same material. (4 marks) (c) What is the mechanism of linear creep? How does temperature affect the mechanism? How does grain size affect the creep rate of linear creep? (6 marks) (d) Describe the conditions that lead to power law creep. How does temperature affect the mechanism of power law creep? (4 marks) (e) A relatively large and thick ceramic plate is subject to a tensile stress o and has an internal crack of length 2a (2a = 0.2 mm). Assume the plane strain fracture toughness Kic of the ceramic is 0.5 MPavm, calculate the critical tensile stress required for the propagation of this crack. (3 marks)
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