Simulations for three-dimensional landmine detonation using the SPH method

•The modified SPH method in combination with the elastoplastic and hypoplastic constitutive models is employed to tackle the large deformation in 3D landmine detonations for the first time.•The modified continuity equation is applied to tackle multiphase interfaces with a high density ratio in soil explosion.•The accuracy of the SPH method is improved by using the Kernel Gradient Correction (KGC) technique.•The Open-MP programming interface is incorporated for the parallelization and computational efficiency of the in-house SPH code.•A wide range of validations are conducted against both fairly new experimental data and other numerical results.