An eyewear frame has a forehead bridge that rests and is supported on a forehead of a user. Composite structures further comprising corrugated adhesion promoter layers to further increase intrinsic interfacial adhesion are also described. The impact-generating side-face may be adapted to generate an impact force during operation, such that the force corresponds to a first vector radially pushing the slurry towards a center of the deflaker and a second vector tangentially pushing the slurry towards the leading face.