泡壁材料性能对泡沫铝压缩性能的影响（英文）

发布时间：2018-10-31 13:07

【摘要】：针对吹气法制备的高孔隙率闭孔泡沫铝,通过实验和有限元分析研究泡壁材料性能对其压缩性能的影响。向添加陶瓷颗粒的A356合金熔体中吹气发泡制备实验样品并进行单向压缩。通过光学显微镜和扫描电镜观察泡壁的微观组织和断口组织。结果表明,泡壁中存在的颗粒团聚、孔洞等缺陷和氧化膜削弱了其性能,因此,泡沫材料的性能与原材料性能有很大差别。基于原材料性能和实体材料性能的实验结果,对泡沫铝理想三维结构进行有限元分析。材料的平台应力与泡沫材料的屈服强度成正比。有限元模拟结果稍高于实验结果,其部分原因是将实体材料性能看做泡壁材料性能导致的。
[Abstract]:The effect of the properties of foam wall materials on the compressive properties of aluminum foam with high porosity and closed porosity prepared by blowing method was studied by means of experiments and finite element analysis. The experimental samples were prepared by blowing and foaming into the melt of A356 alloy with ceramic particles and subjected to unidirectional compression. The microstructure and fracture surface of the bubble wall were observed by optical microscope and scanning electron microscope. The results show that the properties of foam materials are greatly different from those of raw materials because of the agglomeration of particles, pores and oxide film. Based on the experimental results of the properties of raw materials and solid materials, the ideal three-dimensional structure of aluminum foams is analyzed by finite element method. The platform stress of the material is directly proportional to the yield strength of the foam material. The finite element simulation results are slightly higher than the experimental results, partly because the properties of the solid materials are regarded as the properties of the foam wall materials.
【作者单位】：清华大学材料学院;清华大学先进成形制造教育部重点实验室;
【基金】：Project(2013DFR50330)supported by the International Cooperation Project of Science and Technology Ministry of China
【分类号】：TG146.21

【共引文献】