A25-mm thick aisi 1020 steel plate is sandwiched between two 12-mm thick 2024-t3 aluminum plates and compressed with a bolt and nut with no washers. the bolt is m12 × 1.5, property class 5.8. (a) determine a suitable length for the bolt, rounded up to the nearest 5 mm. (b) determine the bolt stiffness. (c) determine the stiffness of the members.

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers