Abstract
The impact response of unidirectional FGM is studied in detail. The behaviour of the material is described by the classical complex model of continuum mechanics. The calculations are performed in 2D axisymmetric approach using a modified Lagrangian method. The mathematical model and numerical method was developed at the Research Institute of Applied Mathematics and Mechanics of Tomsk State University. In the beginning, test calculations were carried out. The evolution of the destruction of homogeneous and FGM-samples, including the time of formation of the first foci of destruction, spall was studied. The time dependences of the velocity of the free surface, hydrostatic pressure, and the damage parameter were constructed. The presence of a graded substrate led to an increase in impact resistance at velocities up to 275 m/s.
Highlights
IntroductionFunctional graded materials (hereinafter FGM) are used in power engineering, engine building, medicine, aviation industry, etc
At present time, functional graded materials are used in power engineering, engine building, medicine, aviation industry, etc
Its impact response one have been poorly studied under shock loading conditions [1,2]
Summary
Functional graded materials (hereinafter FGM) are used in power engineering, engine building, medicine, aviation industry, etc. They can transform the incident pulse, including pulse loosen and redistribute in the desired direction of volume, delay in time. This is unique abilities of FGM, which are absent in constructional materials. It makes sense to investigate samples with a gradient distribution of strength properties. Samples with a gradient distribution of shear modulus, porosity and strength may well be objects of research [3]. In the current research impact of a steel plate on FGM barriers at low initial velocities were investigated. All samples had gradient substrate disposed at the back side
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