密度对泡沫铝吸声性能和抗拉强度的影响

采用驻波管法测量吸声系数以及用金属拉伸试验方法,研究了密度对熔体发泡法制备的泡沫铝样品吸声性能和抗拉强度的影响,并对密度的影响机理进行了分析。研究结果表明,随密度的减小泡沫铝的吸声性能增大,泡沫铝的抗拉强度为几个MPa数量级,密度减小,泡沫铝的抗拉强度呈直线下降。本试验得到的密度对泡沫铝吸声性能和抗拉强度的影响规律与日本的研究结果相似。

INFLUENCE OF THE DENSITY ON THE SOUND ABSORBING PROPERTY AND THE TENSILE STRENGTH OF THE FOAMED ALUMINUM

The influence of the density on the sound absorbing property and the tensile strength of the foamed aluminum was studied by measuring the sound absorbing coefficient with the standing wave tube and testing the metal tensile strength. The influence mechanism of the density was analyzed also. The result showed that the sound absorbing property of the foamed aluminum increased with the decrease of the density, the tensile strength was of several MPa order of magnitude, when the density reduced the tensile strength decreased steeply. The investigated result was similar to that of Japanese sample .