CAJ | 학술논문

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。
포말려재료시일충전형적랍압쌍모량재료，즉수랍여수압시탄성모량불동。사용 ABAQUS 유한원연건대포말려협심판적삼점만곡행위진행료모의。수선，대포말려심층채용가압축포말모형，통과대심층적수랍구화수압구채용불동적탄성모량래토론랍압탄성모량차이대협심판삼점만곡행위적영향。동시，재포말려압축향응일치적정황하，대가반영랍압탄성모량차이적공동모형화미고필랍압탄성모량차이적가압축포말모형적협심판삼점만곡모의결과진행료비교。연구표명，포말려심층적탄성모량대협심판적삼점만곡행위모의유교대영향。약불고필포말려랍압탄성모량적차이，득도적협심판삼점만곡정황하적가재강도화굴복하재명현편저。
Aluminum foam was a typical bimodulous material with different elastic moduli in tension and com-pression.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 e-lastic moduli were adopted in tension and compression zone to study the influence of the elastic moduli.Fur-thermore,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 charac-ter.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 alu-minum foam sandwich panel.