A variable-order time-fractional Kelvin peridynamics model is proposed. where the variable order is utilized to reflect the changes of viscosity in viscoelastic materials to effectively capture the damage and deformation of rock steady creep. The corresponding constitutive model is established by coupling a spring and an Abel dashpot. Through the Caputo definition of fractional-order ... https://jalyttlers.shop/product-category/wooden-pear/