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2D plane strain geometry of the problem

2D plane strain geometry of the problem

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Fig. 1. 3D full geometry and 2D plane geometry of the problem
Fig. 2. 2D plane model of the foam material with positive (a) and...
Fig. 3. 2D plane strain geometry of the problem
Modelling of Impulse Load Influence on the Stress State of Foam Materials with Positive and Negative Poisson’s Ratio
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  • Jun 2020
The influence of impulse load applied for different duration on the distribution of normalised dynamic radial stresses in positive and negative Poisson’s ratio medium was investigated in this study. For solving the non-stationary problem in the case of plane deformation for structurally inhomogeneous materials, the model of Cosserat continuum was a...
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... Pt is known a function describes the change of load intensity over time. In the case of the action of impulse load the change of the load intensity over time is chosen in the form [7]: ...
Investigation of impulse load attenuation in closed-cell foam in the framework of couple stress elasticity
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The article analyzes the processes of attenuation of impulse loads in foam materials with closed-cell. In the framework of the couple stress elasticity, the analysis of the distribution of dynamic radial stresses in foam media with tunnel cavities of constant cross-section under the action of an impulse load of different duration applied to the cavity boundary in the radial direction is performed. An analytical-numerical approach is used for calculating of the dynamic stresses, which is based on the application of the Fourier transform over time and the modified boundary integral equation method. Numerical calculations of the dynamic stresses were performed using the method of mechanical quadrature and collocation method. The modified algorithm for discrete inverse Fourier transform was used for the calculation of the originals of the dynamic radial stresses. Based on the analysis of numerical calculations, the influence of the impulse duration on the attenuation rate of the pulse load in foam media is established.
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