The material constitutive relationship is not only the conclusion of some regulations summarized from experimental data, but also plays an important role in numerical simulations. It reflects the realistic physical and mechanical properties of materials as much as possible to improve the accuracy of numerical results. At present, various kinds of constitutive models for materials are being developed and being optimized constantly along with an increasing need for numerical simulations. Especially for those materials under the loading conditions of large strains, high strain rates, and high pressures (LHH), dynamic constitutive models usually contain more complicated parameters of physical properties and some sensitive coefficients such as various rate effects and strength coefficients,so that the parameter determination becomes an increasingly difficult problem.
The JH-2 constitutive model was initially utilized to simulate the behavior of brittle materials, especially ceramics.the JH-2 model adds softening characteristics and contains pressure-dependent strength, damage, and fracture; significant strength after fracture; bulking; and strain rate effects.
The JH-2 constitutive model assumes that the strength of material, both intact and fractured, is dependent on pressure, strain rate, and damage. The dependence of strength on these parameters is represented by a set of constants. These constants are derived from standard dynamic and quasi-static measurements.
In this simulation high velocity impact of a rigid projectile on the granite stone has been investigated. Explicit step with general contact as inp file to consider internal damage and erosion has been implied. During the analysis the damage variable for granite is obvious. You can see some figures of this simulation at below
You can provide CAE ,INP,and English video files of this simulation here. The cost of these files are Thirty Two US Dollars. you can click on the bellow bottom to beginning process
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