Experimental study on static tensile and acoustic emission monitoring of corroded steel wires and cables
To more accurately perceive the corrosion of cables and evaluate the health status of cables in serv-ice,the correlation between the mechanical property degradation of corroded cables and the tensile acoustic emission(AE)characteristics is studied.Four corrosion degrees of high-strength steel wires and cables are fabricated by neutral salt spray corrosion,and the static tensile tests of corroded high-strength steel wires and model cables are conducted.The calculation method of cable carrying capacity considering the influence of corrosion and cable-making technology is proposed and verified by comparison with the measured value,and the process of tensile fracture is monitored by AE technology.The results show that the measured value,and calculated value of carrying capacity are in good agreement with each other,and the maximum relative error is only 5.8％.With the increase of corrosion degree,the ductility property of the model cable decreases more significantly than the carrying capacity.The AE energy generated by broken wire is the largest,and the peak frequency of broken wire is maintained at about 75 kHz.Due to the degradation of ductility property of corro-ded steel wires,the counts and duration of broken wire increase with the increase of corrosion degree.
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维普
