2. a rectangular plate of width 50 mm and thickness 10 mm has a centrally located hole of diameter 15 mm. calculate the maximum stress at a point on the hole if the internal bending moment at the cross section is known to be 45 n. m. round-up your answer to the nearest mpa.

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