The $162225-mm$ rubber blocks shown

are used in a double$-$U shear mount to

isolate the vibration of a machine from its

supports. An applied load of $P=690N$

causes the upper frame to be deflected

downward by $7$ mm $.$

a$.$ Determine the shear modulus, $G,$ of

the rubber blocks.

b$.$ Calculate shear strain in each corner

of the front face of the block

$($dimensions $16mm22mm).$

c$.$ Draw a $3$D stress element showing

all normal and shear stresses.

d$.$ Write out two $33$ matrixes, one for

stress and the other for strain, in the

rubber blocks after load $P$ is applied.

Please solve B$-$D

Thank you