Optimizing energy absorption in multi-layered materials through controlleddelamination

The intent of this paper is to investigate the mechanics of delamination gr owth in an isotropic, ideally-brittle layered material under an impact load and to present guidelines for the design of more energy absorbent structur es. Using a finite element model, both two- and three-layered configuration s are considered. Prompted by the results from this model, closed-form solu tions for the interlaminar shear strength and the interfacial fracture toug hness corresponding to maximum energy absorption are derived for the two-la yered laminate. These solutions were used to develop guidelines for the opt imal design of two- and three-layered laminates. (C) 1999 Kluwer Academic P ublishers.