To investigate the elasto-plastic characteristics of Aluminum Conductor Steel Reinforced (ACSR) under complex loading conditions, cyclic loading tensile tests were conducted on eight JL/G1A-240/30 ACSR specimens at room temperature. Stress-strain curves of ACSR under cyclic loading were obtained. By analyzing the key mechanical parameters of ACSR’s elasto-plastic behavior, the effect of load amplitude on its performance was studied. Results show that the stress-strain curves of ACSR exhibit pronounced elasto-plastic characteristics, with ACSR continuously releasing plastic deformation during loading and load holding phases. When the load amplitude exceeds 70% of the comprehensive breaking force, the unloading elastic modulus decreases as the load amplitude increases. These experimental results provide data support for disaster prevention and mitigation design in transmission lines.

ACSR,cyclic load,stress-strain curve,elastic modulus,plastic deformation