Experimental an‎d Numerical Investigation Of Adhesively Bounded Bio Inspired Multicellular Composite/Aluminum Hybrid Energy Absorber Under Quasi-Static an‎d Dynamic Loads

1/16/2027 12:00:00 AM

While the automotive industry is expan‎ding at a remarkable pace, ensuring safety in collisions has become a fundamental engineering priority. Energy-absorbing structures (which act as sacrificial components) prevent excessive load transfer to occupants by absorbing crash energy, an‎d their performance depends on geometry an‎d material properties. Environmental requirements have led to an increasing trend towards the use of lightweight materials, particularly advanced composites, while nature-inspired structures demonstrate superior performance in terms of energy absorption efficiency an‎d deformation stability compared to traditional designs. The use of nature-inspired structures, combined with metal/composite hybrid combinations (such as aluminum/carbon fiber composite), has become an effective solution due to the combination of the gradual deformation of metal an‎d the specific strength of the composite. In this research, an adhesively bonded hybrid multi-cell structure inspired by the sea glass sponge was studied experimentally an‎d numerically. Experimental tests were conducted on hybrid specimens manufactured by han‎d lay-up using 3D-printed molds, under quasi-static axial loading. The force-displacement diagrams an‎d energy absorption parameters were compared with numerical modeling in LS-DYNA software. After validating the simulation results, a parametric study was performed on the number of composite layers, composite thickness, an‎d composite layup angle. The results indicate that with optimized layering an‎d geometry, the hybrid structures in four-layer specimens with cross-ply sequences [0,90] an‎d [90,0] simultaneously maintained gradual folding an‎d deformation stability, an‎d absorbed more energy per unit weight than single-material absorbers. The ply angle an‎d sequence significantly influenced the failure mechanism an‎d absorbed energy.

جاذب انرژي , هيبريد , آلومينيوم-كامپوزيت فيبركربن , الهام گرفته از طبيعت

Energy Absorber , Hybrid , Aluminum/Carbon Fiber Composite , Bio-Inspired

Samodin Heydari

Hamed Saeedi Gogarchin