聚丙烯纤维增强水泥基复合材料单轴拉伸损伤本构模型研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (11): 4061-4071.

聚丙烯纤维增强水泥基复合材料单轴拉伸损伤本构模型研究

贾毅, 赵强, 韦朝宽, 宋浩博, 李唐伟, 沈先桃

1.昆明理工大学建筑工程学院,昆明 650500;
2.云南省抗震工程技术研究中心,昆明 650500

收稿日期:2024-04-28 修订日期:2024-06-13 出版日期:2024-11-15 发布日期:2024-11-21
通信作者: 赵强,硕士研究生。E-mail:zq1234545@163.com
作者简介:贾毅(1988—),男,博士,副教授。主要从事桥梁抗震与减隔震、高性能纤维水泥基复合材料、桥梁检测与施工监控方面的研究。E-mail:jiayi0715vip@sina.com
基金资助:
国家自然科学基金(52068037)

Uniaxial Tensile Damage Constitutive Model of Polypropylene Fiber Reinforced Engineered Cementitious Composites

JIA Yi, ZHAO Qiang, WEI Chaokuan, SONG Haobo, LI Tangwei, SHEN Xiantao

1. Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China;
2. Earthquake Engineering Researching Center of Yunnan, Kunming 650500, China

Received:2024-04-28 Revised:2024-06-13 Published:2024-11-15 Online:2024-11-21

摘要/Abstract

摘要： 聚丙烯纤维增强水泥基复合材料(PP-ECC)是具有良好性能且成本低、应用前景广的延性材料。本文通过单轴拉伸试验,讨论不同纤维掺量对PP-ECC受拉力学性能(初裂应力应变、峰值应力应变、应力-应变关系曲线和弹性模量)的影响。根据单轴拉伸的试验结果,参考现有的工程水泥基复合材料(ECC)损伤本构模型和损伤理论,定义损伤因子,构建PP-ECC抗拉特征的损伤本构模型,并对损伤因子拟合函数进行改进,损伤因子的拟合函数选用了一元六次函数,利用Origin和Matlab程序辅助计算和识别损伤因子函数中的相关参数。经过优化的本构模型与试验结果的一致性更高,模型的精确度有了显著提升。

关键词: 工程水泥基复合材料, 聚丙烯纤维, 单轴拉伸, 损伤因子, 本构模型, 应力-应变关系

Abstract: Polypropylene fiber reinforced engineered cementitious composite (PP-ECC) is a ductile material with good properties, low cost and wide application prospect. In this study, the impact of varying fiber content on the tensile mechanical behavior of PP-ECC was explored, encompassing parameters such as initial cracking stress and strain, peak stress and strain, stress-strain relationship, and elastic modulus. Drawing from uniaxial tensile tests, damage factors were defined and a constitutive model tailored to the tensile characteristics of PP-ECC was formulated, leveraging existing engineered cementitious composite (ECC) damage constitutive models and theories. Refinements were made to the fitting function of damage factor, employing a univariate 6th-degree function and utilizing Origin and Matlab for parameter calculation and identification within the damage factor function. The optimized constitutive model demonstrates enhance alignment with experimental results, marking a significant improvement in model accuracy.

Key words: engineered cementitious composite, polypropylene fiber, uniaxial tensile, damage factor, constitutive model, stress-strain relationship

中图分类号:

TU528.58

贾毅, 赵强, 韦朝宽, 宋浩博, 李唐伟, 沈先桃. 聚丙烯纤维增强水泥基复合材料单轴拉伸损伤本构模型研究[J]. 硅酸盐通报, 2024, 43(11): 4061-4071.

JIA Yi, ZHAO Qiang, WEI Chaokuan, SONG Haobo, LI Tangwei, SHEN Xiantao. Uniaxial Tensile Damage Constitutive Model of Polypropylene Fiber Reinforced Engineered Cementitious Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 4061-4071.

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