摘要
采用非接触式光学应变测试系统,跟踪测试了2060 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.
The non-contact optical strain testing system was used to track and test the stress-strain curves of 2060 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.
作者
陈巍
沈锐利
白伦华
齐东春
杨俊
CHEN Wei;SHEN Ruili;BAI Lunhua;QI Dongchun;YANG Jun(Hubei Key Laboratory of Disaster Prevention and Mitigation(China Three Gorges University),China ThreeGorges University,Yichang 443002,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;School of Transportation,Civil Engineering&Architecture,Foshan University,Foshan 528225,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2024年第3期230-236,共7页
Journal of Building Materials
基金
国家自然科学基金资助项目(51178396)
防灾减灾湖北省重点实验室(三峡大学)开放基金资助项目(2023KJZ21)
广东省基础与应用基础研究基金资助项目(2022A1515110289)。
关键词
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
high-strength steel wire
stress-strain curve
high-temperature
mechanical performance index
degree of impairment
fracture mode
