基于声发射参数的超材料对水泥基材料弯曲韧性影响研究

doi:10.16552/j.cnki.issn1001-1625.20241113.001

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (2): 424-433.DOI: 10.16552/j.cnki.issn1001-1625.20241113.001

基于声发射参数的超材料对水泥基材料弯曲韧性影响研究

朱贵旺¹, 秦磊¹, 丁蔚健², 李坪峰³, 孙明³

1.济南大学土木建筑学院,济南 250022;
2.南方科技大学力学与航空航天工程系,深圳 518055;
3.深圳信息职业技术学院交通与环境学院,深圳 518172

收稿日期:2024-07-29 修订日期:2024-10-16 出版日期:2025-02-15 发布日期:2025-02-28
通信作者: 秦磊,博士,教授。E-mail:cea_qinl@ujn.edu.cn
作者简介:朱贵旺(2000—),男,硕士研究生。主要从事防灾减灾方面的研究。E-mail:1635047124@qq.com
基金资助:
国家自然科学基金(52308271);深圳市高层次人才科研启动项目(RC2022-004)

Influences of Metamaterials on Bending Toughness of Cement-Based Materials Based on Acoustic Emission Parameters

ZHU Guiwang¹, QIN Lei¹, DING Weijian², LI Pingfeng³, SUN Ming³

1. School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China;
2. Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
3. School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen 518172, China

Received:2024-07-29 Revised:2024-10-16 Published:2025-02-15 Online:2025-02-28

摘要/Abstract

摘要： 为了探究新型增强材料代替纤维提高混凝土弯曲韧性的可行性,本研究通过3D打印聚乳酸(PLA)制备了超材料,并将超材料嵌入水泥基材料中,利用三点弯曲和声发射联合测量技术,研究超材料与聚丙烯(PP)纤维在弯曲荷载作用下的裂缝发展演化规律及力学性能,并从微观角度分析揭示了超材料和纤维的断裂行为,以及超材料对水泥基材料弯曲韧性的影响。结果表明,试件嵌入超材料时的抗弯强度较掺入PP纤维时提升了40.4%,较对照组提升了116.8%,超材料大幅提高了水泥基材料的抗弯强度,并使其破坏模式由单一裂缝模式转变为多裂缝模式,脆性破坏转变为塑性破坏,而PP纤维仅提高了水泥基材料的抗弯强度。超材料在稳定增长阶段和失稳开裂阶段的拉伸裂纹比例较PP纤维明显提高,在此阶段,超材料韧性指数分别是PP纤维的16.75倍和4.37倍。

关键词: 超材料, 水泥基材料, 弯曲韧性, 多裂缝模式, 塑性破坏, 声发射, 拉伸裂纹

Abstract: To investigate the feasibility of using novel reinforcing materials to replace fibers to improve the bending toughness of concrete, this study used 3D printing of polylactic acid (PLA) to prepare metamaterials and embedded them into cement-based materials. The crack evolution and mechanical properties of metamaterials and polypropylene (PP) fibers under bending load were studied by using three-point bending and acoustic emission measurement technology. The fracture behavior of metamaterials and PP fibers and the effects of metamaterials on the bending toughness of cement-based materials were analyzed from a microscopic perspective. The results show that the flexural strength of specimen embedded with metamaterials is 40.4% higher than that of specimen with PP fibers, and 116.8% higher than that of control group. Metamaterials greatly enhance the flexural strength of cement-based materials, changing the failure mode from a single crack mode to multiple crack modes, and brittle failure to plastic failure. PP fibers only increase the flexural strength of cement-based materials. The proportion of tensile cracks in the stable growth stage and instable cracking stage of metamaterials is significantly higher than that of PP fibers, and the toughness index is 16.75 times and 4.37 times that of PP fibers.

Key words: metamaterial, cement-based material, bending toughness, multiple crack mode, plastic failure, acoustic emission, tensile crack

中图分类号:

TU528

朱贵旺, 秦磊, 丁蔚健, 李坪峰, 孙明. 基于声发射参数的超材料对水泥基材料弯曲韧性影响研究[J]. 硅酸盐通报, 2025, 44(2): 424-433.

ZHU Guiwang, QIN Lei, DING Weijian, LI Pingfeng, SUN Ming. Influences of Metamaterials on Bending Toughness of Cement-Based Materials Based on Acoustic Emission Parameters[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(2): 424-433.

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基于声发射参数的超材料对水泥基材料弯曲韧性影响研究

Influences of Metamaterials on Bending Toughness of Cement-Based Materials Based on Acoustic Emission Parameters

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