The primary objectives of the proposed work are twofold: (1) to investigate the effect of polyurea glass transition on wave propagation and energy absorption of metal-polyurea and composite-polyurea plates, and (2) engineer optimal properties of polyurea, adhesive and composite microstructure that would give rise to nearly optimal energy absortion properties of metal-polyurea and composite-polyurea plates.
To accomplish these goals three tasks are proposed:
Task 1: Parametric study of the phemenological model of polyurea [Error! Bookmark not defined.] on wave propagation and energy absorption of metal-polyurea and composite-polyurea plates;
Task 2: Development and verification of the three-scale metal-polyurea and composite-polyurea models including micromechanical model of polyurea [4] consisting of hard segments with high and soft segments with low ;
Task 3: Development of the Multiscale Design System (MDS) for optimal design of metal-polyurea and composite-polyurea plates
In the following we describe the prior work conducted by the PI followed by a detailed exposition of the proposed tasks. Technical details of the proposed formulation are given in the two Appendices.
