Variable Horizon in a Peridynamic Medium

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A morphing approach to couple state-based peridynamics with classical continuum mechanics (2016, methodology): “Recently, some coupling schemes have been proposed to combine CCM and BPD models; for example, the variable horizon method [13, 19], the force-based coupling”
Dual-horizon peridynamics: A stable solution to varying horizons (2017, background): “The shortcomings of constant horizons In conventional peridynamics, the horizon is required to be constant for a homogeneous body, where being homogeneous means that the strain energy density for any uniform deformation must be invariant with respect to changes in δ [27].”
Dual‐horizon peridynamics (2015, background): “Recently, the partial stress was proposed in [32] to remove the ghost force for varying horizons.”