Analytical Prediction of Low-velocity Impact Response of Composite Sandwich Panels using New TDOF Spring–mass

Abstract

A new equivalent three-degree-of-freedom (TDOF) spring–mass– damper (SMD) model has proposed to predict the low-velocity impact response of composite sandwich panels with transversely flexible core. Impacts are assumed to occur normally over the top face-sheet with the arbitrary different impactor masses and initial velocities. The interaction between the impactor and the panel is modeled with the help of a new proposed system having TDOF consisting of springs, damper, and masses. An analytical procedure that includes the transverse flexibility and structural damping of the core has not yet been dealt with. In the present model, the effects of transverse flexibility of the core and structural damping of the panel are considered analytically. The analysis yields analytic functions describing the history of contact force, displacements of the impactor and the panel in the transverse direction etc. The effects of some physical and geometrical parameters such as initial potential energy of the impactor, the aspect ratio of the panel, location of the impacted point on the panel and the material density of the core on dynamic response of composite sandwich panels have been discussed.

Keywords

sandwich panel core flexibility low-velocity impact core analytical prediction

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Analytical Prediction of Low-velocity Impact Response of Composite Sandwich Panels using New TDOF Spring–mass–damper Model

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