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In this tutorial, the simulation air blast explosion over the composite panel(glass+PVB) in Abaqus has been investigated. Explosions in air create characteristic pressure-time signatures that propagate outwards. Upon impact of the pressure waves with annealed glass, sharp glass fragments are formed which can cause injuries. With blast loading threats, laminated glass is employed to increase protection by the glass fragments remaining adhered to the interlayer, and by the interlayer deforming to absorb the pressure loads. The two solid and deformable glass layers are used. Between those glass layers the PVB material as a solid part is used. You can see a figure of the assembled parts below
To model glass behavior under intensive load such as blast or high velocity impact, the proper material model is needed to be selected. Abaqus gives some material models which they are available in the cae, input file, and vumat subroutine. In this case the input file capability is selected to define new material model for the glass. To model PVB material, the elastic-plastic behavior is selected. The dynamic explicit step is appropriate for this type of analysis. The mass scale technique is considered to reduce the stable time and also reduce the time of the simulation. The perfect or ideal contact is assumed between glass laminates and PVB and also the surface to surface contact with stiffness can be used. The CONWEP air blast procedure is selected to apply blast load on the panel surface. The fixed and symmetry boundary conditions are assigned to the outer sides and symmetry surfaces of the model. The mesh should be fine to achieve the correct results
After the simulation, all results such as stress, strain, damage, ductile damage, failure, and displacement is available. The two glass layers are completely failed and the PVB part has experienced a large deformation during the simulation
You can see some figures for the results below
You can provide CAE ,INP,and English video files of this simulation here. The cost of these files is Twenty-Six Euros. you can click on the bellow bottom to beginning process
You can purchase the tutorial through a PayPal account, a Visa, or a Master card, just before payment,send me an email to this address: karampourp@gmail.com
