泡沫铝变形与吸能特性研究

发布时间：2018-03-04 16:32

本文选题：泡沫铝　切入点：力学性能　出处：《包装工程》2017年21期 　论文类型：期刊论文

【摘要】：目的研究密度、孔洞分布以及加载应变率对泡沫铝材料变形行为和吸能特性的影响。方法对3种不同密度范围的泡沫铝材料进行不同应变率下的压缩实验研究。结果实验结果显示,在10 mm/min加载速率下,密度范围为0.27~0.33 g/cm3和0.47~0.53 g/cm3的泡沫铝材料平均屈服应力分别为1.3和7.2MPa,平均应变能密度分别为0.8和3.8 MJ/m3。此外,密度为0.453 g/m3但孔洞分布不均匀的泡沫铝应变能密度为3.26 MJ/m3,密度为0.449 g/m3但孔洞分布均匀的泡沫铝应变能密度为3.84 MJ/m3。结论随着密度的增加,泡沫材料的屈服应力以及对应于不同应变时的应力均增加,而孔洞分布均匀的泡沫材料的能量吸收能力明显优于孔洞分布不均匀的泡沫材料,此外,加载速度对泡沫材料的应力应变行为有一定的影响,但对其能量吸收能力并无影响。
[Abstract]:Objective to study density, The effects of pore distribution and strain rate loading on deformation behavior and energy absorption characteristics of aluminum foam materials were investigated. The compression experiments of three kinds of aluminum foam materials with different densities were carried out under different strain rates. At the loading rate of 10 mm/min, the average yield stress and strain energy density of aluminum foam materials with the density range of 0.27 ~ 0.33 g / cm ~ 3 and 0.47 ~ 0.53 g / cm ~ 3 are 1.3 and 7.2 MPA, respectively, and the average strain energy densities are 0.8 and 3.8 MJ / m ~ (3), respectively. The strain energy density of aluminum foam with a density of 0.453 g / m ~ 3 but uneven pore distribution is 3.26 MJ / m ~ (3) and 0.449 g / m ~ (3) but the strain energy density of aluminum foam is 3.84 MJ / m ~ (3). The yield stress of foam material and the stress corresponding to different strain are increased, but the energy absorption ability of foam material with uniform pore distribution is obviously better than that of foam material with uneven distribution of pores, in addition, the energy absorption ability of foam material with uniform pore distribution is better than that of foam material with uneven pore distribution. The loading rate has a certain effect on the stress-strain behavior of foam materials, but has no effect on its energy absorption capacity.
【作者单位】：中国工程物理研究院总体工程研究所;
【分类号】：TB383.4;TG146.21

【相似文献】