Nomenclature	Name	Unit
A	Helmholtz free energy density	J/m3
B	DEG coefficient	%NK/MPa
C	heat capacity	J/K
N	number of cycles
N, Nk	number of moles of substance	mol
P	dissipative process energy	J
P	pressure	Pa
Q	heat	J
S	entropy density or entropy content	J/m3K or MPa/K
S’	entropy generation or production	J/m3K or MPa/K
t	time	s
T	temperature	degC or K
U	internal energy	J
$\mathcal{V}$	volume	m3
w	degradation measure
W	work, strain energy density	J, J/m3
Symbols
α	thermal expansion coefficient	/K
κT	isothermal loadability
μ	chemical potential
ρ	density	Kg/m3
$\sigma$	stress	MPa
$\mathsf{\epsilon }$	strain	%
ζ	phenomenological variable
Subscripts & acronyms
0	initial
e	elastic
MST, μT	Micro-Structuro-Thermal
p	plastic
rev	reversible
irr	irreversible
phen	phenomenological
DEG	Degradation-Entropy Generation