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This paper investigates the eccentric low-velocity impact of Fiber metal laminates (FMLs) subjected to spherical projectile using a unified ZigZag plate theory. The presented zigzag plate theory enforces transverse shear stress continuity through the thickness and can be reduced to conventional plate theories using appropriate shape function. The governing equations and suitable boundary conditions are obtained using the principle of minimum total potenital energy. Runge-Kutta method is employed to solve initial value problem resulted by the method of Ritz. The present model is validated by comparison and good agreement between its results and those of reports in open literature. Influence of various specifications of impact phenomenon such as laminate thickness, projectile radius, projectile velocity, in-plane load and eccentricity parameter is examined on deflection and contact force time history. The obtained results indicate that continuity of transverse shear stress is required to achieve accurate contact force even for moderately thin FMLs.

Highlight  High velocity impact behavior of Autoclaved aerated concrete (AAC) was studied.  An analytical model was presented to predict the residual velocity of projectile.  Four energy absorption mechanism considered to predict impact behavior accurately.  The model validated by comparison of model results with those of experiments.  The validated model was employed for parametric study and sensitivity analysis.

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights  Accurate prediction of stress filed plays an important role in highly anisotropic laminates.  An Unified ZigZag Theory is developed with two primary variable under thermal environment.  Comparison of the model predictions and that of literature indicates good agreement.  The results show the interlaminar continuity(IC) causes more accurate stress in thin laminates