why do beach marks on a fracture surface imply fatigue failure? Do all samples failed by fatigue have beach marks on fracture surface, and why?
Describe the characteristic features of a fatigue fracture surface. How does the appearance of a fatigue failure differ from a monotonic failure?
Question 9 (12 marks) a) Both beachmarks and striations are fatigue fracture surface features that have similar appearance, however, they striations and beachmarks in terms of (1) size and (2) origin, respectively. (4 marks) are different. Briefly explain the difference between fatigue b) List four measures that may be taken to increase the resistance to fatigue of a metal alloy. (4 marks) The impact test (or Charpy test) can be used to determine whether or not a material experiences c)...
4. Why do the fatigue failure criteria have only the first quadrant? What to do for negative midrange stress? 5. What is notch sensitivity? 6. For combined loading, what's the procedure to do the fatigue analysis. I 4. Why do the fatigue failure criteria have only the first quadrant? What to do for negative midrange stress? 5. What is notch sensitivity? 6. For combined loading, what's the procedure to do the fatigue analysis. I
Why do EHR Projects fail? Support your answer with an example of failed EHR project and explain the reasons for their failure.
help with question 5 please. there are two samples given with two different pictures of each. all of the information to solve is given A material may fail in many ways; in a ductile or brittle mode; by creep or fatigue; by corrosion or stress corrosion; by hydrogen or liquid metal embrittlement; by slow tensile overload or by impact. An examination of the failure may tell you a lot about the material and the failure mode. In this course, you...
help with question 4 please. there are two samples given with two different pictures of each A material may fail in many ways; in a ductile or brittle mode; by creep or fatigue; by corrosion or stress corrosion; by hydrogen or liquid metal embrittlement; by slow tensile overload or by impact. An examination of the failure may tell you a lot about the material and the failure mode. In this course, you have learned (we trust) the correlations between structure-properties,...
i) What do we mean by Pareto efficiency? ii) What is a market failure? iii) Have you ever encounter a situation where the allocation was not efficient? iv) Efficiency is not the same than equity. Explain the difference v) (Difficult) Why efficiency is a commonly used as an objective for public policy (more than equity). (Hint: think about which type of policies will be easier to pass in the congress?) vi) One hundred people are distributed in two beaches. In...
1. i) What do we mean by Pareto efficiency? ii) What is a market failure? iii) Have you ever encounter a situation where the allocation was not efficient? iv) Efficiency is not the same than equity. Explain the difference v) (Difficult) Why efficiency is a commonly used as an objective for public policy (more than equity). (Hint: think about which type of policies will be easier to pass in the congress?) vi) One hundred people are distributed in two beaches....
(ii) (a) Why do wind turbines have three blades? [2 marks] (b) Compare and contrast your answer if you choose to use two blades or [4 marks] four blades instead of three blades.
1: Why do externalities in a market result in market failure (i.e., the market outcome doesn’t maximize the total social surplus)? 2: Argue for two specific goods that are currently or should have a Pigouvian tax or subsidy imposed on them. What is the externality that is (or should be) being corrected for?