Advanced honeycomb structures for aerospace: Multiscale mechanics, bio-inspired hierarchical design, and multi-physics coupling responses

Honeycomb structure is widely used in aerospace field because of its unique periodic topology, high porosity and low density, showing excellent specific stiffness, specific strength and excellent energy absorption capacity. This paper systematically reviews the research progress of design, preparation and mechanical properties of honeycomb structures for aerospace. Firstly, the classification and core characteristics of honeycomb structures are reviewed, and the material selection and preparation process are discussed according to the different needs of aircraft. Secondly, the mechanical behavior response law of honeycomb structure under various loads (including static load, impact load and other multi-field coupling loads) is deeply analyzed. In addition, the strategies to improve the performance of honeycomb structure are expounded from the aspects of topology optimization, multiscale simulation and process improvement. This review highlights the necessity of developing honeycomb structures with superior performance, low cost, and ultra-high dimensional stability to meet the strict requirements of material properties in the aerospace field, and provides valuable insights for guiding future research and aerospace applications.