Analytical prediction of large mass impact damage in composite laminates

High velocity impact on NCF reinforced composites

“…Two engineering models for analysis of foreign object impact on monolithic composite laminates have been developed by Olsson [2,3], the small mass and large mass impact models. They constitute simple tools for evaluating the severity of a solid object to composite plate impact.…”

“…The models [2,3] are divided according to type of behaviour at impact; short impact times (through-the-thickness waves), intermediate impact times (flexural and shear waves), and long impact times (lowest vibration mode, quasi-static). The following discussion will focus on the intermediate (small mass impact) and long impact times (large mass impact).…”

“…These are representative for laminates where the major deformation mechanisms are bending and shear deflection. Full expressions of the Olsson small and large mass models are found in references [2] and [3].…”

“…impact damage resistance must be at hand. A number of impact damage resistance models and modelling techniques are available for solid impact bodies [1][2][3][4]. The applicability of these models for analysis of ice and stone impact is not fully assessed.…”

“…Kim and co-workers [5,6] have addressed the ice impact event and developed a semi-empirical approach to the problem. These types of simple and easily accessible engineering models [1][2][3][4][5][6] are required in the design phase as a complement to the more detailed and cumbersome analyses using numerical approaches. The most promising numerical procedures employ soft particle hydrodynamics (SPH) to model the behaviour of the ice at impact [7].…”