Experiments on the spall fracture of plates make it possible to investigate the strength properties of materials in a wide range of strain rates [1]. The characteristic feature of such experiments is the possibility of generating very high stresses in materials subjected to the simplest uniaxial deformation, which makes them irreplaceable in testing analytical and numerical models of the high-speed fracture of solids. A promising approach to simulating spall fracture is the use of the particle dynamics method (molecular dynamics) according to which a material is considered as a set of interacting particles (atoms) whose motion is described by classical dynamic equations. On the one hand, this discrete model allows the inclusion of the features of the behavior of a substance at the microlevel. On the other hand, this model with a large number of particles can be used to verify and test continuum medium models [2-7]. In classical molecular dynamics, particles are atoms, whereas in particle dynamics, they can also be associated with other structural elements (e.g., the grains of the material) or be used as specific finite elements, i.e., discrete carriers of the properties of the medium.
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