Dick wrote:
Help an old mind come to the correct conclusion G.

The situation is (2) steel straps side by side and fully in contact with a
bolt hole at each end . One is 4130 with about 80,000 psi tensile and the
other a heat treated 4130 to a 124,000 psi tensile strength.

Is the combination strength 80,000 or 124,000 or
204,000 psi tensile??

Thanks, Dick



Probably none of the above. I don't know of any way to simply "combine"
the yield strengths of two different materials. Typically, you would
look at the Emod of both materials, compute n, use that to convert the
area of the weakest material to be equivalent to that of the strongest
material, determine epsilon under the maximum load you expect to see,
and then convert that back to sigmas for both materials and then
determine if you have exceeded the yield strength of the weaker material.


Matt