of SiC produced surface flaws of a semielliptical geometry. The flaws that were generated have dimensions a = 1 mm, width w =

Q1. (i) Initial strain Please enter your answers here Q1. (i) Your Answers: Please enter your supplied question data Q1. (ii) E0 B (hr1¹Pa-¹) n Fracture 0.003 4.60E-34 Mechanics of Materials 2 Tutorial 6 Q1. (ii) E General guidance on the Tutorial Portfolio assignment was provided at the beginning of Tutorial Exercise 1 and is available separately on-line on the module website. B 3.2 A Q2. σ (Pa) σo (Pa) 780,000,000 This tutorial exercise assesses fundamental understanding of the creep and stress relaxation response of metals subjected to either constant load or constant strain. It is designed to reinforce learning of principles set out in your current stage 2 lecture notes in "Creep Failure and Stress Relaxation" and to build on knowledge previously presented in the stage 1 module "Solids & Structures". C Q3. t (hr) For further information you may refer to Chapter 21 (Creep and Viscoelasticity) of Benham, Crawford, and Armstrong (1996), 2nd Ed. Q1. A typical graph of strain (e) versus…

How can I solve for the %0.2 offset strain and the calculated stress? Original diameter : 6mm Original length : 30mm Fracture diameter : 4.54mm

A strain gauge mounted at a potentially critical point in a steel part has recorded the stress history shown below during 20 seconds of typical use. Identical parts have been fatigue tested under constant amplitude loading with R = -1 to give an endurance limit of 60 ksi and a fatigue strength of 140 ksi at N = 1000 cycles. The steel used has an ultimate strength of 165 ksi. Estimate the fatigue life of the part under typical use. How much will the fatigue life in problem 3 (above) be reduced if a mean stress of 10 ksi is added to the stress history given?