$\mathsf{\Omega }$	The inclusion domain of a fuel particle
${ℝ}^3$	The three-dimensional Euclidean space
$\mathsf{\Gamma }$	The interface between metal matrix and interaction layer
$\mathbf{C}$	The fourth-order elastic tensor
$\mathbf{u}$	The second-order displacement tensor
$\mathsf{\epsilon }$	The second-order strain tensor
$\mathsf{\sigma }$	The second-order stress tensor
$f,\mathrm{IL},\mathrm{M}$	Superscripts which denote variables of fuel particle and interaction layer, respectively
$\mathrm{H},\mathrm{G},\mathrm{T}$	Superscripts which denote variables of inhomogeneous, fission gaseous fragments and temperature, respectively
${\mathsf{\epsilon }}^{\ast }$	The eigenstrain of the first equivalent transformation
${\mathsf{\epsilon }}^{\ast \ast }$	The eigenstrain of the second equivalent transformation
${\mathsf{\epsilon }}^0$	The applied strain produced by environmental pressure
$P_f$	The irradiation swelling pressure exerting on matrix
$P_m$	The environmental pressure
$P_g$	The internal pressure in fission pores
$\mathbf{G}(\mathbf{x}-{\mathbf{x}}^{\prime })$	The Green’s function
$\mathsf{x}$	The point set out of a fuel particle
${\mathsf{x}}^{\prime }$	The point set inside a fuel particle
${\sigma }_{rr}$	The radial stress