This paper presents a review on using friction coefficient in modelling ballistic impact. The are discussed on friction introduced in modelling the impact at different levels: micro (fiber and yarns). meso (woven or unidirectional fabrics) and macro (layered or equivalent monoblock structures). Recent works simulating the impact projectile - target. https://parisnaturalfoodes.shop/product-category/rapid-mass-boston-cream-pie/