摘要
建立蜂窝芯层有限元模型,并基于广义胡克定律分析蜂窝芯层中胞元数目对面内等效弹性模量的影响。具体算例表明:蜂窝芯层横向胞元数变化对其面内横向等效弹性模量影响较小,对纵向等效弹性模量影响较大;纵向胞元数变化严重影响蜂窝芯层面内横向等效弹性模量,但对纵向等效弹性模量影响较小。同时得到结论:当蜂窝芯层纵向尺寸与横向尺寸比值小于1.3时,其面内横向等效弹性模量小于纵向等效弹性模量;反之,横向等效弹性模量大于等于纵向等效弹性模量;对于大尺度结构,可建立缩比模型求解其等效弹性模量。
The honeycomb core model was built by finite element method （FEM）. And based on Hooke＇ s law, the equivalent elastic modulus of honeycomb core influenced by the change of cell number was studied. The result indicates that the horizontal equivalent elastic modulus is affected slightly while the vertical equivalent elastic modulus is influenced severely by the changes of cell number in horizontal direction. The changes of cell number in vertical direction have a strong impact on the horizontal equivalent elastic modulus while that affect the vertical equivalent elastic modulus slightly. When the ratio of honeycomb core＇ s size in horizontal direction to that in vertical direction is less than 1.3, the horizontal equivalent modulus is less than the vertical equivalent elastic modulus. On the other hand, the horizontal equivalent modulus is greater than or equal to the vertical equivalent elastic modulus. For the large-scale structure, a honeycomb core with similar proportion can be established to calculate the equivalent elastic modulus.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第3期488-492,共5页
Journal of Mechanical Strength
关键词
蜂窝芯层
等效弹性模量
有限元
胞元数
Honeycomb core
Equivalent elastic modulus
FEM
Cell number
