Answer:
The strength coefficient is K = 591.87 MPa
Explanation:
We can calculate the strength coefficient using the equation that relates the tensile strength with the strain hardening index given by
[tex]S_{ut}=K \left(\cfrac ne \right)^n[/tex]
where Sut is the tensile strength, K is the strength coefficient we need to find and n is the strain hardening index.
Solving for strength coefficient
From the strain hardening equation we can solve for K
[tex]K = \cfrac{S_{ut}}{\left(\cfrac ne \right)^n}[/tex]
And we can replace values
[tex]K = \cfrac{275}{\left(\cfrac {0.4}e \right)^{0.4}}\\K=591.87[/tex]
Thus we get that the strength coefficient is K = 591.87 MPa
