摘要
为了揭示泡沫填充对复合夹层板剪切性能增强的机理,采用数值仿真方法模拟横向剪切载荷作用下空心夹层板和泡沫铝填充I型复合夹层板的失效过程,讨论泡沫铝对夹层板板格和腹板的支撑效应,分析孔隙率、平均孔径等材料参数对复合夹层板剪切性能的影响。结果表明,泡沫铝对复合夹层板的板格形成有效的内部支撑,有助于提高腹板的屈曲强度和复合夹层板的整体横向剪切强度。减小孔隙率能够增强复合夹层板的抗剪能力,孔洞平均直径对剪切强度影响较小。在夹层板空腔中填充泡沫铝能够显著提升I型复合夹层板抵抗横向剪切的能力。
In order to reveal the mechanism of foam-filling to enhance composite sandwich panel, the failure processes of empty and foam-filled I-core sandwich panels under transverse shear load were simulated by numerical simulation method. The supporting effect of aluminum foam on grids and webs of sandwich panel were discussed. The influence of material parameters on the shear performance of composite sandwich panel were analyzed, such as porosity and average pore diameter etc. The results show that aluminum foams provide an effective internal support for grids, which improve the buckling strength of the web and the overall transverse shear strength of composite sandwich panel. The decrease of porosity can enhance the shear resistance of composite sandwich panel. The average pore diameter has little effect on the shear strength. The filling of aluminum foam in cavities of sandwich panel can significantly improve the transverse shear resistance of I-core composite sandwich panel.
作者
戴广民
陈震
DAI Guang-min;CHEN Zhen(State Key Laboratory of Ocean Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《舰船科学技术》
北大核心
2022年第8期12-16,共5页
Ship Science and Technology
关键词
泡沫铝
夹层板
横向剪切
增强机理
aluminum foam
sandwich panel
transverse shear
enhancement mechanism
