Question

Problem. A cylindrical specimen of a hypothetical metal having a diameter of 7.671 mm and a gauge length of 251.905 mm is pulled in tension. Use the load–elongation characteristics shown in the following table to complete parts (a) through (f).

(a) Plot the data as stress (MPa) versus strain

(b) Compute the modulus of elasticity in GPa

(c) Determine the yield strength at a strain offset of 0.002

(d) Determine the tensile strength of this alloy

(e) What is the approximate ductility, in percent elongation?

(f) Compute the modulus of resilience

Answer 1

In this data is also required with regards of load and elongation curve. load elongation testing of specimen, increasing load is applied and at every load increment, the elongation is noted.

Then the stress is given by force/ area

Strain is change in length/ original length

Then the graph is plotted between stress and strain in excel.

The slope of the curve is called modulus of elasticity

Stress corresponding to lowest yield point is called yield stress.

Modulus of resilience is the total energy stored in stress strain curve.