1. ### I Impact of superconductivity on mechanical properties?

It is often said that the mechanical properties of metals are mostly due to their free electrons. I'm talking about malleability, ductility and hardness. So, when they suffer a superconductive transition, I expect a drastic change in their mechanical properties, but I haven't found anything on...
2. ### Discontinuous yielding in a low alloy steel

What could prevent the discontinuous yield (upper and lower) points during a tensile test on a low alloy steel A706 grade? Thanks.
3. ### Surface Tension, find number of stitches to be made

Homework Statement The tension in the skin of the left ventricle of heart is 4.90 N/m. A cut is made on the left ventricle during surgery. How many stitches must be used to repair the cut? Each stitch will safely support a tension of 0.4 N. Homework Equations Surface tension = force/length...
4. ### Mechanical properties: strain

Homework Statement A copper rod of length l_0 at 0 C is placed on a smooth surface.Now the rod is heated up to 100 C.FIND THE LONGITUDINAL STRAIN DEVELOPED ? The Attempt at a Solution What I did : strain = delta l/ l_0 = l_0 alpha(coefficient of linear expansion) delta T/l_0...
5. ### Calculate variation in volume using given Poisson's ratio

Homework Statement : A cylinder is elongated by 2% of its original length. If Poisson's ratio of its material is 0.3. Calculate the percentage variation in volume.[/B] Homework Equations V = πr^2l η= 0.3= Δl/l/Δr/r[/B] The Attempt at a Solution I tried using calculus to differentiate V to...