首页|2060MPa级高强钢丝高温力学性能及破断模式

2060MPa级高强钢丝高温力学性能及破断模式

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采用非接触式光学应变测试系统,跟踪测试了2 060 MPa级高强钢丝试件在20～900℃下的全过程应力-应变曲线,建立了高温钢丝各力学性能指标的高温函数模型,得到其高温破断参数.结果表明:高温下高强钢丝试件的各力学性能指标均有不同程度折损.当温度低于200℃时,试件的力学性能指标折损率不超过10%,破断模式为脆性破坏;当温度超过200℃后,试件的各力学性能指标折损率显著增大,破断模式逐渐由脆性破坏转变为塑性破坏.
Mechanical Properties and Fracture Mode of 2 060 MPa Grade High-Strength Steel Wire at High-Temperature
The non-contact optical strain testing system was used to track and test the stress-strain curves of 2 060 MPa grade high-strength steel wire specimens throughout the entire process at 20-900℃.The mechanical performance index at high-temperature was determined,and the high-temperature fracture parameters of high-strength steel wire were obtained.The results indicate that the mechanical properties of high-strength steel wire specimens suffer various degrees of impairment at high-temperature.When the temperature does not exceed 200℃,the degradation of each mechanical property index of specimen shall not exceed 10%,and the fracture mode is brittle failure.After the temperature exceeds 200℃,the degradation of each mechanical property index of specimen significantly increases,and the fracture mode gradually changes from brittle failure to plastic failure.

high-strength steel wirestress-strain curvehigh-temperaturemechanical performance indexdegree of impairmentfracture mode

陈巍、沈锐利、白伦华、齐东春、杨俊

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三峡大学 防灾减灾湖北省重点实验室(三峡大学),湖北 宜昌 443002

西南交通大学 土木工程学院,四川 成都 610031

佛山科学技术学院 交通与土木建筑学院,广东 佛山 528225

高强钢丝 应力-应变曲线 高温 力学性能指标 折损程度 破断模式

国家自然科学基金防灾减灾湖北省重点实验室(三峡大学)开放基金广东省基础与应用基础研究基金

511783962023KJZ212022A1515110289

2024

10.3969/j.issn.1007-9629.2024.03.006

建筑材料学报
同济大学

建筑材料学报

CSTPCD北大核心
影响因子：1.046
ISSN：1007-9629
年,卷(期)：2024.27(3)
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