Separate tensile tests of ACSR at high and low temperatures

Abstract

In order to ensure the accuracy of the test and avoid the errors caused by the slip between the steel and aluminum materials, the mechanical properties of ACSR at different temperatures were studied by the method of separate experiment of steel strand and aluminum strand. The test results show that with the increase of temperature, the elastic modulus of aluminum strand and steel strand decreases, but the elastic modulus of steel strand decreases more. There is no obvious strengthening stage and yield stage for aluminum strand, but obvious elastic stage, yield stage, strengthening stage and local necking stage for steel strand. The failure parts of aluminum strands are concentrated in the position of 1 / 2 ∼ 1 / 3 of the samples, and the failure parts of each strand tend to develop along the twisting direction. The failure position of the steel strand is basically in the same cross section of the middle area of the sample. The experimental results of steel and aluminum strands are basically consistent with the results of the whole steel reinforced aluminum strand, which proves that the experimental method is feasible.