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

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4233-4241.

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

雷龙坚¹, 郝勇¹, 袁满¹, 杜国锋¹, 袁洪强¹, 左清军²

1.长江大学城市建设学院,荆州 434023;
2.三峡大学防灾减灾湖北省重点实验室,宜昌 443002

收稿日期:2023-07-11 修订日期:2023-08-25 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 郝勇,博士,高级工程师。E-mail:518004@yangtzeu.edu.cn
作者简介:雷龙坚(1999—),男,硕士研究生。主要从事岩土工程方面的研究。E-mail:2021720751@yangtzeu.edu.cn
基金资助:
国家自然科学基金(52078052);防灾减灾湖北省重点实验室(三峡大学)开放基金(2021KJZ08);湖北省科技厅重点研发计划(2022BAD151)

Study on Compressive Mechanical Properties of Carbon Nanotube Cement-Based Materials Based on Acoustic Emission and DIC

LEI Longjian¹, HAO Yong¹, YUAN Man¹, DU Guofeng¹, YUAN Hongqiang¹, ZUO Qingjun²

1. School of Urban Construction, Yangtze University, Jingzhou 434023, China;
2. Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China

Received:2023-07-11 Revised:2023-08-25 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 为研究碳纳米管(CNTs)对水泥基材料抗压力学性能的影响,对不同掺量(0%~1.0%,质量分数)CNTs的水泥基材料进行单轴抗压试验,并采用声发射(AE)和数字图像相关方法(DIC)进行全过程监测。结果表明:随着CNTs掺量增加,试件的抗压强度呈先增大后减小的趋势,当CNTs掺量为0.6%时,试件抗压强度达到最大值,较对照组提升了23.6%;当CNTs掺量为0.8%时,试件抗压强度较掺0.6%CNTs时降低了10.6%,较对照组提升了10.5%。振铃计数、能量变化与试件加载过程的应力应变曲线吻合较好,振铃计数与能量突增可以作为试样损伤破坏的预警依据。加载阶段的应变值随碳纳米管掺量增加先增大后减小,并且抗压强度小的试件率先出现明显应变变化。主应变云图主要为轴向分布,表明试件表面的破坏模式以竖向劈裂为主。

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

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.

Key words: carbon nanotube, cement-based material, acoustic emission, digital image correlation method, damage monitoring

中图分类号:

TU528

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.

LEI Longjian, HAO Yong, YUAN Man, DU Guofeng, YUAN Hongqiang, ZUO Qingjun. Study on Compressive Mechanical Properties of Carbon Nanotube Cement-Based Materials Based on Acoustic Emission and DIC[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4233-4241.

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