Energy-Absorption and Vibration-Attenuation Design Using Shell-Based Mechanical Metamaterials
Explosion and impact loadings pose a serious threat to the service safety of defense and industrial equipment.Energy-absorbing materials can effectively reduce structural vibration and the damage caused by impact.Traditional energy-absorbing materials,such as aluminum foam,have a relatively limited design space.Therefore,it is urgent to develop new energy-absorbing materials.In this paper,the energy-absorbing mechanism of porous materials was systematically investigated based on numerical modelling of the impact process.The simulation results indicate that energy-absorbing materials can have a good shock absorption performance only when the strength is appropriate.In order to realize customized design of energy-absorbing materials,shell-based mechanical metamaterials with different energy-absorbing characteristics were designed based on the machine learning and genetic algorithm.The effectiveness of the newly designed metamaterials in energy-absorption and vibration-attenuation was verified through simulation results.This study can provide important technical guidelines for the design and optimization of new energy-absorbing materials.
energy absorptionvibration attenuationporous materialsshell-based mechanical metamaterials
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