$S_c$	Transmission stress
$\Delta {\mathrm{S}}_N$	Stress range at a specified cycle
$\Delta S_s$	Stress range in stable condition
$e_c$	Compressive strain
$\Delta e$	Strain range
$E_s$	The absorbed strain-energy-density during monotonic compression
$E_{s,a}$	The absorbed strain-energy- density during cyclic compression
$E_{s,r}$	The released strain-energy-density during cyclic compression
$C_{ER}$	Static effectiveness index
$D{C}_{ER}$	Cyclic effectiveness index
$RS$	Softening factor
$R{E}_{s,a}$	Energy reduction factor
$S_c\left(e_c\right)$	Stress-polynomial-function
$E_s\left(e_c\right)$	Energy-polynomial-function