Eigenvalue Buckling Performance Analysis of Honeycomb Sandwich Panel with Typical Pit Defects in High Temperature Environment
Honeycomb sandwich panel is a common hot structure in aircraft,and pits of different shapes are easily formed on its surface during service.In order to study the effect of different shapes of pits on the eigenvalue buckling performance of the honeycomb sandwich panel,three kinds of parametric finite element model for honeycomb sandwich panel with pit defects were built,namely circu-lar pit,quadrate pit,and equilateral pit.Influence of key parameters on the eigenvalue buckling performance of the honeycomb sand-wich panel was analyzed under both constant temperature and variable temperature environment.The results show that with the increas-ing of diameter or dopth of the pit defect,the critical buckling load increases under both the two temperatures environment.By using contrastive analysis method,the influence of the three kinds of pit defects on the structure was obtained when the pit defects have the same area or the same perimeter.When the pit defects have the same area,the structure with circular pit has the largest critical buck-ling load and when the pit defects have the same perimeter,the structure with equilateral pit has the largest critical buckling load,and both the differences among them are negligible.
万方数据
维普
