Question

1. A steel sheet metal of 0.0265-in thick is bent to a radius of 0.5-in. Assuming that its yield stress is 300 MPa, calculate (a) the radius of the part after spring back and (b) the required bend angle to achieve a 90o bend after spring back has occurred.

2. Prove that Engineering strain of a sheet metal is

e = 1 / [ ( 2 *R* / *t* ) + 1 ]

Answer #1

Determine the theoretical minimum bend radius for a 0.125 inch
thick sheet metal for 304 stainless steel whose fracture strain in
tensile test is 40%.

1) There are two naturally occurring types of
copper, ^63Cu (62.92960 u) and ^65Cu (64.92780 u).
a) Given that the atomic weight of copper is 63.546 u, what are
the natural abundances of ^63Cu and ^Cu?
b) What makes ^63Cu different from ^65Cu. Be specific!!
c)Which copper is regular copper and which one is the
isotope?
2) Consider the following questions
a) Light takes 8 minutes and 19 seconds to reach from the sun to
the earth. The speed of...

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