Low-velocity impact response of stiffened metal doubly curved shallow shells with porous microcapsule coating in hygrothermal environment is analyzed considering the in-plane initial load. A modified nonlinear Hertzian contact law which ignores the influence of friction is considered for the low velocity impact problem. Based on the classical shell theory considering the von Kármán geometric nonlinearity, the governing equations of motion for this structure are derived from the Hamilton's variation principle while the finite difference method...
