e) What are the factors that may change the mechanical response of such thermosets drastically (5 points)

3- Micromechanics and structural relations. (20point) In the following stress-strain curve three different resins are compared. (UP.EPOXY,VINYL ESTER) and two different manufacturing method such as vacuum infusion (VI) and hand lay- up followd by cold pressing (HCP). Please answer the following questions based on this knowledge. 60 -UP(VI) UP (HCP) Epoxy (VI) Epoxy (HCP) Vinyl ester (VI) Vinyl ester (HCP) SO 40 Stress (MPa) 30 20 10 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2 1 Strain (%) a) What is the fundemental difference between VI and hand-lay-up process. Please state your reasonings (3points) b) Please rank portrayed materials in terms of their Young's Modulus. Please state your reasonings (3points) c) Please rank portrayed materials in tems of their ductility. Please state your reasonings. (3points) d) Why do you think cold pressing provides a significant property improvement for Vinyl ester resin? (3points)