单聚丙烯纤维拉拔界面变形的细观力学分析

毕玉洁; 毛灵涛; 刘海洲; 刘娇娇; 刘逸凡

doi:10.12141/j.issn.1000-565X.240560

华南理工大学学报(自然科学版) >

2025 , Vol. 53 >Issue 12: 161 - 171

DOI: https://doi.org/10.12141/j.issn.1000-565X.240560

材料科学与技术

单聚丙烯纤维拉拔界面变形的细观力学分析

毕玉洁 ,
毛灵涛 ,
刘海洲 ,
刘娇娇 ,
刘逸凡

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^1.中国矿业大学（北京）力学与土木工程学院，北京 100083
^2.中国矿业大学（北京）煤炭精细勘探与智能开发全国重点实验室，北京 100083
^3.中国科学院深圳先进技术研究院，广东深圳 518055
^4.中国建筑第七工程局有限公司，河南郑州 450000

毕玉洁（1986—），女，博士生，工程师，主要从事聚丙烯纤维混凝土细观力学性能研究。E-mail： 280833463@qq.com

毛灵涛（1974—），男，博士，教授，主要从事实验力学、图像处理与分析等研究。E-mail： mlt@cumtb.edu.cn

收稿日期: 2024-11-21

网络出版日期: 2025-02-25

基金资助

国家重点研发计划项目(2022YFC2904102)

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Microscopic Mechanical Analysis of Interface Deformation During Pull-Out of Single Polypropylene Fiber

BI Yujie ,
MAO Lingtao ,
LIU Haizhou ,
LIU Jiaojiao ,
LIU Yifan

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^1.School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China
^2.State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources，China University of Mining and Technology，Beijing 100083，China
^3.Shenzhen Institutes of Advanced Technology，Chinese Academy of Sciences，Shenzhen 518055，Guangdong，China
^4.China Construction Seventh Engineering Division Corp. ，Ltd. ，Zhengzhou 450000，Henan，China

毕玉洁（1986—），女，博士生，工程师，主要从事聚丙烯纤维混凝土细观力学性能研究。E-mail： 280833463@qq.com

Received date: 2024-11-21

Online published: 2025-02-25

Supported by

the National Key Research and Development Program of China(2022YFC2904102)

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摘要

为研究聚丙烯纤维与混凝土界面的粘结力学特性，通过单纤维拉拔细观力学试验与数值模拟对界面的脱粘过程进行了分析。采用微CT与自行研制的单纤维拉拔装置建立了单纤维拉拔原位扫描观测系统，对压痕型单根聚丙烯纤维从砂浆基体中拔出的过程进行了原位扫描观测；结合力学正则化全局数字体图像相关法，获得了纤维与基体界面的变形场，由纤维与基体间共用节点的相对位移量化了界面的脱粘；基于CT图像建立了反映纤维和基体真实形状的三维细观数值模型，模拟分析了单纤维的拉拔过程。结果表明：拉力-位移曲线在峰值后呈现出与压痕纤维几何形状特点相关的多峰特征，由数字体图像相关法测量和数值模拟所得的界面应变场均呈现出与压痕纤维几何形状特点相关的应变集中现象，表明纤维的周期性压痕增强了拉拔过程中纤维与基体之间的摩擦和咬合力；界面处相对位移在纤维嵌入端部最大，沿纤维方向减小，在水平方向上，相对位移的变化规律与纤维的几何形状具有相关性；在垂直方向上，相对位移反映出拉力达到峰值荷载前纤维与基体已完全脱粘。

关键词： 聚丙烯纤维混凝土; 界面脱粘; 数字体图像相关法; 三维变形场测量

本文引用格式

毕玉洁 , 毛灵涛 , 刘海洲 , 刘娇娇 , 刘逸凡 . 单聚丙烯纤维拉拔界面变形的细观力学分析[J]. 华南理工大学学报(自然科学版), 2025 , 53(12) : 161 -171 . DOI: 10.12141/j.issn.1000-565X.240560

Abstract

To investigate the bonding mechanical properties between polypropylene fiber and concrete interface, this study analyzed the debonding process of the interface through single fiber pull-out microscopic mechanical experiments and numerical simulations. An in-situ scanning observation system was established using micro CT and a self-developed single fiber drawing device to observe the process of pulling out a single polypropylene fiber with indentation from the mortar matrix. The deformation fields of the interface between fiber and matrix was obtained with mechanically regularized global digital volume correlation, and the interface debonding was quantified by calcula-ting the relative displacement of the shared nodes between the fiber and the matrix. A 3D microscopic numerical model reflecting the true shape of fibers and matrix was established based on CT images, and the single fiber dra-wing process was simulated and analyzed. The results show that the force-displacement curves display multi-peak fluctuations corresponding to the fiber geometry after the peak. The strain fields at interfaces measured by digital volume correlation and numerical simulation show a strain concentration phenomenon related to the geometric shape of the indentation fiber, indicating that the periodic indentation of the fiber increases mechanical interlocking and friction forces between the fiber and the matrix during pullout. The relative displacement at the interface is greatest and decreases along the fiber’s axial direction. In the horizontal direction, the variation of relative displacement was correlated with the geometric shape of the fiber. The relative displacement in the vertical direction reflected that the fiber and matrix have completely debonded before the pullout force reaches the peak load.

Key words： polypropylene fiber reinforced concrete; interface debonding; digital volume correlation method; measurement of three-dimensional deformation field

参考文献

[1]	鲁根．刘店矿岩巷喷射钢纤维混凝土支护技术试验［J］．煤炭工程，2010（1）：32-33.
	LU Gen ．Experimental study on spray steel fiber concrete support technology for Liudian mine rock lane［J］．Coal Engineering，2010（1）：32-33.
[2]	庞建勇，徐道富．聚丙烯纤维混凝土喷层支护技术及其在顾桥矿区的应用［J］．岩石力学与工程学报，2007，26（5）：1073-1077.
	PANG Jianyong， XU Daofu ．Support technology of polypropylene fiber concrete shotcrete layer and its application to Guqiao coal mine［J］．Chinese Journal of Rock Mechanics and Engineering，2007，26（5）：1073-1077.
[3]	王圣保，王世杰．喷射纤维混凝土在灾后建筑加固中的应用［J］．建筑科学，2010，26（S2）：59-62.
	WANG Sheng-bao， WANG Shi-jie ．Application of fiber-concrete spraying in reinforcing building after damaged［J］．Building Science，2010，26（S2）：59-62.
[4]	单俊鸿，周明凯，张美强．聚丙烯纤维混凝土在路桥中的应用［J］．新型建筑材料，2004（8）：20-22.
	SHAN Junhong， ZHOU Mingkai， ZHANG Meiqiang. Application of polypropylene fiber reinforced concrete in roads and bridges［J］．New Building Materials，2004（8）：20-22.
[5]	SHAN J H， ZHOU M， LI B X，et al ．Application of polypropylene fiber concrete in bridge deck pavement［J］．Environmental Ecology and Technology of Concrete，2006，302/303：418-423.
[6]	CHEN Y， CEN G P， CUI Y H ．Comparative study on the effect of synthetic fiber on the preparation and durability of airport pavement concrete［J］．Construction and Building Materials，2018，184：34-44.
[7]	马骉，胡长顺，路学敏，等．UTW路面用混凝土试验研究［J］．公路交通科技，2003，20（6）：8-12.
	MA Biao， HU Chang-shun， LU Xue-min，et al ．Experimental study of concrete for ultra-thin whitetopping pavement［J］．Journal of Highway and Transportation Research and Development，2003，20（6）：8-12.
[8]	HUSSAIN I，ALI B， AKHTAR T，et al ．Comparison of mechanical properties of concrete and design thickness of pavement with different types of fiber-reinforcements （steel，glass，and polypropylene）［J］．Case Studies in Construction Materials，2020，13：e00429/1-10.
[9]	郭进军，韩菊红，卢燕．混合腐蚀环境下改性混凝土的力学性能［J］．建筑材料学报，2013，16（2）：330-334.
	GUO Jin-jun， HAN Ju-hong， LU Yan ．Mechanical properties of modified concrete exposed to composite corrosive environment［J］．Journal of Building Materials，2013，16（2）：330-334.
[10]	张秉宗，贡力，杜强业，等．西北盐渍干寒地区聚丙烯纤维混凝土耐久性损伤试验研究［J］．材料导报，2022，36（17）：108-114.
	ZHANG Bingzong， GONG Li， DU Qiangye，et al ．Experimental investigation on durability damage of polypropylene fiber reinforced concrete in saline and dry cold region of northwest china［J］．Materials Reports，2022，36（17）：108-114.
[11]	鲁海波，张广泰，刘诗拓，等．盐渍土环境下聚丙烯纤维混凝土柱抗震性能［J］．浙江大学学报（工学版），2023，57（1）：111-121.
	LU Hai-bo， ZHANG Guang-tai， LIU Shi-tuo，et al ．Seismic behavior of polypropylene fiber concrete column in saline soil environment［J］．Journal of Zhejiang University （Engineering Science），2023，57（1）：111-121.
[12]	苏丽，牛荻涛，黄大观，等．海洋环境中玄武岩/聚丙烯纤维增强混凝土氯离子扩散性能［J］．建筑材料学报，2022，25（1）：44-53.
	SU Li， NIU Di-tao， HUANG Da-guan，et al ．Chloride diffusion performance of basalt/polypropylene fiber reinforced concrete in marine environment［J］．Journal of Building Materials，2022，25（1）：44-53.
[13]	LIANG C， ZHAO P Q， ZOU H H，et al ．Introducing fiber to enhance the mechanical properties and durabi-lity of polymer-modified cement-based coating［J］．Construction and Building Materials，2023，372：130842/1-11.
[14]	LI Q B， DONG Z Y ．Some developments on meso-mechanics of fiber-reinforced quasi-brittle composites［J］．Advances in Mechanics，2001，31：555-582.
[15]	RUTGER V， PRISCO M， VANDEWALLE L ．Short-term and creep pull-out behavior of polypropylene macrofibers at varying embedded lengths and angles from a concrete matrix［J］．Construction and Building Mate-rials，2017，147：858-864.
[16]	SIGRüNER M， MUSCAT D， STRüBBE N. Investigation on pull-out behavior and interface critical para-meters of polymer fibers embedded in concrete and their correlation with particular fiber properties［J］．Journal of Applied Polymer Science，2021，138（28）：e50745/1-12.
[17]	W?LFEL E， BRüNIG H， CUROSU I，et al ．Dynamic single-fiber pull-out of polypropylene fibers produced with different mechanical and surface properties for concrete reinforcement［J］．Materials，2021，14（4）：722-921.
[18]	李长辉，陈雪芳，张献民，等．合成粗聚丙烯纤维与水泥砂浆界面黏结力学性能［J］．复合材料学报，2023，40（4）：2427-2440.
	LI Changhui， CHEN Xuefang， ZHANG Xianmin，et al ．Interface mechanical bonding properties between coarse synthetic polypropylene fiber and cement mortar［J］．Acta Materiae Compositae Sinica，2023，40（4）：2427-2440.
[19]	FLANSBJER M， PORTAL N W， HALL S，et al ．Analysis of failure modes in fiber reinforced concrete using X-ray tomography and digital volume correlation［J］．Proceedings，2018，2（8）：401/1-6.
[20]	J?NICKE G， VINTACHE A， SMANIOTTO B，et al ．Debonding analysis via digital volume correlation during in-situ pull-out tests on fractal fibers［J］．Composites Part C：Open Access，2022，9：100302/1-19.
[21]	LECLERC H， PERIE J N， ROUX S，et al ．Voxel-scale digital volume correlation［J］．Experimental Mechanics，2011，51（4）：479-490.
[22]	LIU H Z， FRANCOIS H ．Quantifying 3D crack propagation in nodular graphite cast iron using advanced digital volume correlation and X-ray computed tomography［J］．Engineering Fracture Mechanics，2024，296：109824/1-19.
[23]	一种用于工业CT原位拉拔试验的加载装置：CN213842852U［P］．
[24]	毛灵涛，朱鑫鑫，安里千，等．数字标记点图像相关法在模型实验中的应用［J］．辽宁工程技术大学学报（自然科学版），2013，32（10）：1367-1373.
	MAO Lingtao， ZHU Xinxin， AN Liqian，et al ．Application of digital target marker image correlation method in model experiment［J］．Journal of Liaoning Technical University （Natural Science），2013，32（10）：1367-1373.
[25]	SCHINDELIN J， ARGANDA-CARRERAS I， FRISE E，et al ．Fiji：an open-source platform for biological-image analysis［J］．Nature Methods，2012，9（7）：676-682.

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