ENGRI_HW7_soln_2006 - ENGRI 111 Homework 7 Solutions Due...

Info icon This preview shows pages 1–3. Sign up to view the full content.

ENGRI 111 Homework # 7 Solutions Due Monday, December 4, 2006 1. Draw a stress/strain (engineering) curve for a typical metal and a typical ceramic. For the metal also draw the true stress/strain curve. The green line is a typical stress strain curve for a ceramic. The red line is a typical engineering stress strain curve for a metal, and the blue line is the corresponding true stress strain curve. Strain Stress
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

2. Answer a - k with true or false and explain your answer with a short sentence. a) Grain boundaries are created when crystals of different orientations are joined together. True, but the crystals must be identical. The grains of a polycrystalline ceramic or metallic material are essentially crystals of different orientations joined together along surfaces or interfaces called grain boundaries. True, but the crystals must be identical. b) In a ceramic the tensile stress is 50 % greater than the yield strength. False, ceramics do not plastically deform (like metals) and hence do not have a yield strength.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern