What is the value of normal strain (ε11) for a rectangular plate whose length and thickness are given by 100mm*1mm respectively, when a tensile load of 1000N is applied parallel to the fiber direction? Take the value of E11 as 138GPa.

What is the value of normal strain (ε11) for a rectangular plate whose length and thickness are given by 100mm*1mm respectively, when a tensile load of 1000N is applied parallel to the fiber direction? Take the value of E11 as 138GPa. Correct Answer 0.725 * 10-4

Tensile load is applied parallel to the fiber direction, that is, in the 1-direction. Therefore, σ11 = F/A = (1000 N)/ ((100 mm) * (1 mm)) = 10 MPa and σ22 = 0. Now, we calculate the normal strain ε11 ε11 = σ11/E11 = (10MPa)/(138GPa) = 0.725 * 10-4.
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