Problem $4$:

a$.$ Calculate the creep modulus for a part loaded in uniaxial tension with a load of $14N$ on a sample with $1m{m}^2$ cross$-$sectional area after $1$ year of continuous loading. Use the properties given in Problem $3.$

b$.$ Given the deformation gradient for planar loading condition,

$F=\left[\begin{array}{ccc}& 0& 0\\ 0& 1& 0\\ 0& 0& \frac{1}{}\end{array}\right]$

Write the Left Cauchy$-$Green deformation tensor and its first and third invariants.

Problem $3$:

A tube made from polymer ABC is $5mm$ thick, $70mm$ mean diameter and $3m$ long. The pipe is used to transport chemically neutral gases that are pressurized to $0\mathrm{.}5$MPa. Estimate the outside diameter midway along the pipe after $1$ year. A technical manager is inquiring what would be the outside diameter if the pressure was held constant by capping the ends for $1$ day. Clearly state and justify your assumptions. If needed, $v=0\mathrm{.}3.$

THERE ARE MULTIPLE PHOTOS! PLEASE SEE ALL