Development of Empirical Formulae for Predicting Critical Impact Energies of Local Missile Impact Phenomena on Concrete Structures

Abstract

Great demand exists for more efficient design to protect personals and critical components against impact by kinetic missiles, generated both accidentally and deliberately, in various impact and blast scenarios in both civilian and military activities. In many cases, projectiles can be treated as rigid bodies when their damage and erosion are not severe. Due to the intricacy of the local impact damages, investigations are generally based on experimental data. Conclusions of the experimental observations are then used to guide engineering models. Local damages studies normally fall into three categories, i.e. empirical formulae based on data fitting, idealised analytical models based on physic laws and numerical simulations based on computational mechanics and material models. In the present study, empirical formula for each case of local impact phenomena were developed using curve Fitting technique such as linear equation, polynomial equation, etc. based on existing experimental data. Encouraging prediction shows when the developed empirical formulae were compared with existing established empirical formulae and experimental data.