不同边界条件下泡沫铝硅合金的内耗特征

Characteristics of Internal Friction of Foamed Al-SiAlloy in Different Boundary Conditions

为了获得不同边界条件下泡沫金属的内耗特征,通过采用动态机械分析仪在不同弯曲模式下对泡沫铝硅合金的内耗进行实验研究。结果表明:泡沫铝硅合金在不同边界条件下的内耗峰出现情况不同,且温度对三点弯曲模式时内耗的频率特性影响最大;三种边界条件下泡沫铝硅合金的内耗的振幅效应基本相似;温度对该材料在三点弯曲模式比单双悬臂梁振动模式下内耗的影响更大。

In this paper, the internal friction of foamed Al-Si alloy(ZL104) in different bending modes was investigated, for getting the characteristics of the internal friction of foamed metal in different boundary conditions. The experimental results show that the internal friction peak of the material in the three conditions appears differently, and the influence of temperature on the characteristics of frequence of internal friction in the 3-Point Bending mode is greatest;the strain-amplitude effects of the three boundary conditions of the material are similar basically;the influence of temperature on the internal friction of the material in 3-Point bending mode is greater than the single and dual bending modes.