硅酸盐通报2023，Vol.42Issue(12)：4233-4241,9.
基于声发射和DIC的碳纳米管水泥基材料抗压力学性能研究
Study on Compressive Mechanical Properties of Carbon Nanotube Cement-Based Materials Based on Acoustic Emission and DIC
摘要
Abstract
In order to study the influences of carbon nanotubes(CNTs)on compressive mechanical properties of cement-based materials,uniaxial compressive test was conducted on cement-based materials with different of CNTs content(0% ～1.0% ,mass fraction),and acoustic emission(AE)and digital image correlation method(DIC)were used for whole process monitoring.The results show that with the addition amount of CNTs,the compressive strength of specimen increases first and then decreases.The compressive strength of specimen reaches the maximum value when the content is 0.6% ,which is 23.6% higher than that of control group.When the content of CNTs is 0.8% ,the compressive strength of specimen is 10.6% lower than 0.6% CNTs group and 10.5% higher than that of control group.The ringing count and energy change are in good agreement with stress-strain curve of specimen during loading.The ringing count and energy sudden increase can be used as early warning basis for the damage and failure of specimen.The strain value in loading stage increases first and then decreases with the increase of CNTs content,and the specimen with low compressive strength first shows obvious strain changes.The main strain cloud diagram is mainly axial distribution,indicating that the failure mode of specimen surface is mainly vertical splitting.关键词
碳纳米管/水泥基材料/声发射/数字图像相关方法/损伤监测Key words
carbon nanotube/cement-based material/acoustic emission/digital image correlation method/damage monitoring分类
建筑与水利引用本文复制引用
雷龙坚,郝勇,袁满,杜国锋,袁洪强,左清军..基于声发射和DIC的碳纳米管水泥基材料抗压力学性能研究[J].硅酸盐通报,2023,42(12):4233-4241,9.基金项目
国家自然科学基金(52078052) （52078052）
防灾减灾湖北省重点实验室(三峡大学)开放基金(2021KJZ08) （三峡大学）
湖北省科技厅重点研发计划(2022BAD151) （2022BAD151）
