Influence of geometric parameters of honeycomb panel on measurement value of core shear modulus
To obtain accurate shear modulus of honeycomb core through three-point bending test,the finite element simulation model of three-point bending test was verified based on the geometric parameters of commercial aluminum honeycomb sandwich panels and typical shear modulus values.The influence laws of geometric parameters of honeycomb sandwich panels on the measured shear modulus values of the core were studied.Using Sobol method to analyze the sensitivity of each influencing factor,a simplified surrogate model was obtained by fitting.Based on the simplified surrogate model,the applicable feasible region of geometric parameters of honeycomb sandwich panels in three-point bending test was given.The research results show that the influence of geometric parameters of honeycomb sandwich panels on the measured shear modulus of the core is in descending order of core density,face to core thickness ratio,and panel thickness.With-in the given applicable feasible region,the accuracy of the shear modulus of the honeycomb core measured by three-point bending method is good,which can provide reference for practical engineering.
万方数据
维普
