Secant Modulus of Elasticity
Secant modulus is one of several methods used to calculate modulus of elasticity, which is a measurement of a material's elasticity. Calculating secant modulus involves using two points on a stress-strain curve to calculate the slope of the stress/strain. When using this method, the first point is always zero and the second is always a non-zero value. For example, if secant modulus is calculated at 2% tensile strain, the formula for the calculation is: Secant Modulus = (σ2 - σ1) / (ε2 - ε1) = (Stress @ 2% Strain - 0) / (2% Strain – 0)
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