$(30$ p$)$ A material is deformed in uniaxial tension at room temperature and exhibits the yield stress vs$.$ log strain rate curve shown in the figure below. This reference curve shows regimes I and II $($rate independent and logarithmic, respectively$)$ of the generic $$normal$$ behavior discussed in class. Sketch the $($equivalent$)$ curve that would be measured in each of the following situations and state in few words what changes with respect to the reference curve: a$)$ loading is performed at room temperature and stress is triaxial $($equal normal stress applied in the three directions$),$ b$)$ loading is uniaxial and is performed at a temperature higher than room temperature. c$)$ The vertical axis shows the flow stress at a strain larger than the yield strain. $3.(30$ p $)$ A material is deformed in uniaxial tension at room temperature and exhibits the yield stress vs$.$ log strain rate curve shown in the figure below. This reference curve shows regimes I and II $($rate independent and logarithmic, respectively$)$ of the generic "normal" behavior discussed in class. Sketch the $($equivalent$)$ curve that would be measured in each of the following situations and state in few words what changes with respect to the reference curve:

a$)$ loading is performed at room temperature and stress is triaxial $($equal normal stress applied in the three directions$),$

b$)$ loading is uniaxial and is performed at a temperature higher than room temperature.

c$)$ The vertical axis shows the flow stress at a strain larger than the yield strain.