LAUSR

The in-plane impact behavior of composite honeycomb structures is investigated in this paper using theoretical analysis and numerical simulation. A composite honeycomb structure model was built by dividing a honeycomb model into sub-domains in-plane and filling these sub-domains with circular and square honeycombs. This paper mainly focuses on the effects of impact velocity, honeycomb microtopology types, and honeycomb microtopology-type distribution in sub-domains on the deformation mode, plateau stress, load uniformity, and energy absorption capacity of composite honeycomb structures. A semiempirical formula for the plateau stress of composite honeycomb structures is presented. The results show that the honeycomb microtopology-type distribution in sub-domains is an important factor affecting the mechanical properties of composite honeycomb structures. Compared to regular honeycombs, crosswise arranging sub-domains of honeycombs with different microstructure types is more favorable for the load uniformity of composite honeycomb structures, and more fully couple type I structure and type II structure, which provides complementary advantages.