{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CAEE - TENSILE TEST IN MATERIALS OVERVIEW Today we will...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: TENSILE TEST IN MATERIALS OVERVIEW Today we will compare steel and aluminum in a tensile test. Identical specimens of each material will be provided for testing. They are about 4 inches long in the gauge length, 1/8 inch thick and 0.530 inches wide. As they are loaded in the testing machine, both load and deformation will be recorded. In the first stage there is elastic behavior where stress is linearly related to strain. If unloaded in this range there would be no permanent strain. But when yielding occurs, stress stops being proportional to strain and unloading results in permanent strain. This defines the yield point which is very obvious in steel but harder to discern in aluminum. The modulus of elasticity is the slope of the stress —strain plot before yielding. TEST PROCEDURE 1 i ix) DJ 4 5 6 Verify the test specimen dimensions. Mount the test specimen in the machine and seat the grips. Begin monitoring load and deformation in the elastic range. The xy recorder will print deformation against load. . You can convert load to stress using the relation, Stress : Load / Cross section area . Approximate strain is given by deformation / gauge length . At failure determine the true stress and fracture strain. QUESTIONS TO BE ANSWERED IN YOUR REPORT 1. 2 4 .7. 4 What properties did you determine in the test ? . How do steel and aluminum compare in these properties ? How do strength to weight and stiffness to weight ratios compare ? . What does this infer as to their structural applications ? REPORT OUTLINE: Introduction Test procedure observations Data collected and analysis Results and Conclusions Supporting information ( any sketches, photos, plots you wish to include ) DENSITIES: Steel 0.284lb/cu.in. Aluminum 0.097lb/cu.in. 7* ...
View Full 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