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Unformatted text preview: a mismatch in the coefficients of thermal expansion of the film and of the substrate. (j) Nanoindentation is a convenient way to probe the mechanical response of nanostructures. (k) Nanoindentation techniques rely on measuring continuously the applied load and the area of the indentation in the sample. 3. The following data were collected from a 0.4-in.-diameter test specimen of polyvinyl chloride. The gauge length is the length of the specimen that is changing due to the load. After fracture, the gauge length is 2.09 in. and the diameter is 0.393 in. Plot the data as stress vs. strain and calculate: a) the 0.2% offset yield strength b) the tensile strength c) the modulus of elasticity d) the % elongation (=the strain x 100 for the gauge length after fracture) Load (lb) Gauge Length (in) 2.00000 300 2.00746 600 2.01496 900 2.02374 1200 2.032 1500 2.046 1660 2.070 1600 2.094 1420 2.12...
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- Fall '07
- Materials Science, Tensile strength, gauge length, Nanoindentation