A bimetallic thermal control is made of cold-rolled yellow brass and magnesium alloy bar...

A bimetallic thermal control is made of cold-rolled yellow brass and magnesium alloy bars (Figure P15–12). The bars are arranged with a gap of 0.005 in. between them at 72° F. The brass bar has a length of 1.0 in. and a cross-sectional area of 0.10 in.², and the magnesium bar has a length of 1.5 in. and a cross-sectional area of 0.15 in.². Determine (a) the axial displacement of the end of the brass bar and (b) the stress in each bar after it has closed up due to a temperature increase of 100° F. Use at least one element for each bar in your finite element model.