摘要
泡沫铝材料是一种典型的拉压双模量材料,即受拉与受压时弹性模量不同。使用ABAQUS有限元软件对泡沫铝夹芯板的三点弯曲行为进行了模拟。首先,对泡沫铝芯层采用可压缩泡沫模型,通过对芯层的受拉区和受压区采用不同的弹性模量来讨论拉压弹性模量差异对夹芯板三点弯曲行为的影响。同时,在泡沫铝压缩响应一致的情况下,对可反映拉压弹性模量差异的孔洞模型和未考虑拉压弹性模量差异的可压缩泡沫模型的夹芯板三点弯曲模拟结果进行了比较。研究表明,泡沫铝芯层的弹性模量对夹芯板的三点弯曲行为模拟有较大影响。若不考虑泡沫铝拉压弹性模量的差异,得到的夹芯板三点弯曲情况下的加载刚度和屈服荷载明显偏低。
Aluminum foam was a typical bimodulous material with different elastic moduli in tension and compression. The three point bending behaviors of sandwich panel were simulated using ABAQUS FEA software. The crushable foam material constitutive model was used to simulate aluminum foam core, and the different elastic moduli were adopted in tension and compression zone to study the influence of the elastic moduli. Furthermore, the void model with bimodulous character was used to simulate the three-point bending response of aluminum foam sandwich panels. Based on the same monotonic compression response of aluminum core, the simulated results of void model were compared with that of crushable foam model without bimodulous character. It was shown that the elastic moduli of aluminum foam core has a great influence on the three point bending behavior of aluminum foam sandwich panels. If the bimodulous effects of aluminum foam was neglected, the simulated loading stiffness and yield load are obviously on low side for the three-point bending behaviour of aluminum foam sandwich panel.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第18期2701-2705,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(11002119)
关键词
拉压双模量
泡沫铝夹芯板
可压缩泡沫模型
三点弯曲
数值模拟
bimodulous
aluminum foam sandwich panel
crushable foam model
three-point bending
numerical simulation
