$Assignkpstrain

$Assignkpstrain is to privde the strain information of each layer

The format is

$Assignkpstrain
${ϵ}_{xx}$ ${ϵ}_{yy}$  ${ϵ}_{zz}$ ${ϵ}_{yz}$ ${ϵ}_{zx}$ ${ϵ}_{xy}$
${ϵ}_{xx}$ ${ϵ}_{yy}$  ${ϵ}_{zz}$ ${ϵ}_{yz}$ ${ϵ}_{zx}$ ${ϵ}_{xy}$
${ϵ}_{xx}$ ${ϵ}_{yy}$  ${ϵ}_{zz}$ ${ϵ}_{yz}$ ${ϵ}_{zx}$ ${ϵ}_{xy}$
...
...
... total N layers