Equivalent dynamic mechanical properties of grid cylindrical structure
Grid cylindrical structure with infinite variety of cell shape and arrangement receives much concern, which results in many applications of these structural materials in aerospace and aviation engineering. However, the complexity of structure will bring high time-consuming in calculation and unanticipated self-contract in researching dynamic performance. Equations were used to get the equivalent material properties by theoretical derivation. Then dynamic mechanical properties of both equivalent structure and grid cylindrical structure were investigated. In detail, the dynamic deformation and energy absorption characteristics of the structure under different lateral impact velocities were analyzed by software LS-DYNA. The relative density and the relative thickness of the grid cylindrical structure to equivalent performance effect were taken into account. The results show that when relative density and relative thickness are defined in certain range, the equivalent method has high accuracy. This equivalent method provides a reference for the impact properties of complex grid cylindrical structure with arrangement periodically.
Grid structure Homogenization Deformation mode Energy absorption Effective property
Lin Xiao-hu Gao Xuan Yang Er-meng Xing Chun-lei
Army Aviation Institute of PLA,Beijing 101123,China Department of Engineering Mechanics,Beijing University of Technology,Beijing 100124,China
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）