Calculate the punch force F (N) required to complete blanking. Circle with diame...
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Calculate the punch force F (N) required to complete blanking. Circle with diameter of 18.5 mm must be cut out of the material with 5.1 mm in thickness and 104 MPa tensile strenght.
where L - the total length sheared, mm; s - thickness of material, mm; τ1 (tau1) - shear strength of material, MPa; Rm - tensile strength of material, MPa.
Relative error +/- 1% allowed. Circle circumference is L=pi()*d.
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