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Study on low-cycle hysteresis properties of seawater corroded steel considering loading history effects
https://orcid.org/0000-0003-1742-7193
Highlights The early-stage loading history can shorten the elastic deformation range and yield platform length of the steel, causing the steel to undergo plastic deformation earlier. The degradation degree of steel mechanical properties considering the double effects is much greater than that considering only the effects of corrosion or early-stage loading history. A generalized hysteresis mechanical model has been established, considering the double effects of loading history and corrosion.
Abstract To investigate the combined effects of wave loading history and time-dependent corrosion damage on the hysteresis mechanical properties of long-term serviced marine engineering materials, this study conducted hysteresis mechanical experiments and a generalized mechanical model research on corroded steel, considering the influence of high-cycle loading history. Steel corrosion was pre-generated by accelerated electrochemical corrosion method. Developing the early-stage high-cycle fatigue loading system and later-stage low-cycle hysteresis loading system based on the dynamic characteristics of wave loads, seismic actions, and typhoon-level pulsating wind loads. Analyze the influence of the independent and combined effects of early-stage load stress levels, cycle times, and corrosion damage on the steel capacity to withstand low-cycle high-stress hysteresis loading. Based on test results and mechanical properties, an improved generalized hysteresis mechanical model was established that encompassed monotonic tension curves, skeleton curves, and well-defined loading and unloading rules. The validity and universality of the model were verified through various loading systems and hysteretic tests of corroded steel. The results indicated that the early-stage high-cycle fatigue history led to a reduction in the material's elastic range, causing the material to transition into plasticity earlier. The combined effects of early-stage loading history and corrosion damage resulted in a significant degradation of the material's hysteresis mechanical properties.
Study on low-cycle hysteresis properties of seawater corroded steel considering loading history effects
https://orcid.org/0000-0003-1742-7193
Highlights The early-stage loading history can shorten the elastic deformation range and yield platform length of the steel, causing the steel to undergo plastic deformation earlier. The degradation degree of steel mechanical properties considering the double effects is much greater than that considering only the effects of corrosion or early-stage loading history. A generalized hysteresis mechanical model has been established, considering the double effects of loading history and corrosion.
Abstract To investigate the combined effects of wave loading history and time-dependent corrosion damage on the hysteresis mechanical properties of long-term serviced marine engineering materials, this study conducted hysteresis mechanical experiments and a generalized mechanical model research on corroded steel, considering the influence of high-cycle loading history. Steel corrosion was pre-generated by accelerated electrochemical corrosion method. Developing the early-stage high-cycle fatigue loading system and later-stage low-cycle hysteresis loading system based on the dynamic characteristics of wave loads, seismic actions, and typhoon-level pulsating wind loads. Analyze the influence of the independent and combined effects of early-stage load stress levels, cycle times, and corrosion damage on the steel capacity to withstand low-cycle high-stress hysteresis loading. Based on test results and mechanical properties, an improved generalized hysteresis mechanical model was established that encompassed monotonic tension curves, skeleton curves, and well-defined loading and unloading rules. The validity and universality of the model were verified through various loading systems and hysteretic tests of corroded steel. The results indicated that the early-stage high-cycle fatigue history led to a reduction in the material's elastic range, causing the material to transition into plasticity earlier. The combined effects of early-stage loading history and corrosion damage resulted in a significant degradation of the material's hysteresis mechanical properties.
Study on low-cycle hysteresis properties of seawater corroded steel considering loading history effects
https://orcid.org/0000-0003-1742-7193
Highlights The early-stage loading history can shorten the elastic deformation range and yield platform length of the steel, causing the steel to undergo plastic deformation earlier. The degradation degree of steel mechanical properties considering the double effects is much greater than that considering only the effects of corrosion or early-stage loading history. A generalized hysteresis mechanical model has been established, considering the double effects of loading history and corrosion.
Abstract To investigate the combined effects of wave loading history and time-dependent corrosion damage on the hysteresis mechanical properties of long-term serviced marine engineering materials, this study conducted hysteresis mechanical experiments and a generalized mechanical model research on corroded steel, considering the influence of high-cycle loading history. Steel corrosion was pre-generated by accelerated electrochemical corrosion method. Developing the early-stage high-cycle fatigue loading system and later-stage low-cycle hysteresis loading system based on the dynamic characteristics of wave loads, seismic actions, and typhoon-level pulsating wind loads. Analyze the influence of the independent and combined effects of early-stage load stress levels, cycle times, and corrosion damage on the steel capacity to withstand low-cycle high-stress hysteresis loading. Based on test results and mechanical properties, an improved generalized hysteresis mechanical model was established that encompassed monotonic tension curves, skeleton curves, and well-defined loading and unloading rules. The validity and universality of the model were verified through various loading systems and hysteretic tests of corroded steel. The results indicated that the early-stage high-cycle fatigue history led to a reduction in the material's elastic range, causing the material to transition into plasticity earlier. The combined effects of early-stage loading history and corrosion damage resulted in a significant degradation of the material's hysteresis mechanical properties.
Study on low-cycle hysteresis properties of seawater corroded steel considering loading history effects
Yang, Yang (author) / Chen, Pengyu (author) / Lv, Wanyang (author) / He, Zheng (author) / Bai, Yuchuan (author)
Applied Ocean Research ; 142
2023-12-11
Article (Journal)
Electronic Resource
English
Residual structural performance of corroded steel tubes submerged in seawater
| British Library Conference Proceedings | 2008