上海交通大学学报

上海交通大学学报 >

2022 , Vol. 56 >Issue 9: 1199 - 1207

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.089

船舶海洋与建筑工程

水泥净浆弹性模量的纳米压痕表征与多尺度计算

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  • 1.上海交通大学 船舶海洋与建筑工程学院;上海市公共建筑和基础设施数字化运维重点实验室,上海 200240
    2.中冶建筑研究总院有限公司,北京 100088
陈小文(1996-),男,福建省福州市人,硕士生,从事水泥基材料纳米压痕表征研究.

收稿日期: 2021-03-19

  网络出版日期: 2022-10-09

基金资助

国家自然科学基金(51308334);国家自然科学基金(51479113);国家重点研发计划(2016YFC0701003);国防科技创新特区项目13-07主题

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Multiscale Calculation of Elastic Modulus of Cement Paste Based on Grid Nanoindentation Technology

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  • 1. School of Naval Architecture, Ocean and Civil Engineering;Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Central Research Institute of Building and Construction, MCC Group Co., Ltd., Beijing 100088, China

Received date: 2021-03-19

  Online published: 2022-10-09

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摘要

基于微观力学测试和复合材料理论,计算水泥基材料的多尺度弹性参数,是水泥基材料基于性能的精细化设计理论基础之一.本研究对不同水灰比的硬化水泥净浆试样进行微观弹性模量的纳米压痕测试和孔隙结构压汞试验,基于多相材料均质化理论,建立考虑孔隙影响的水泥净浆弹性模量多尺度计算方法,并比较稀疏法、自洽法、Mori-Tanaka法、相互作用直推法和多层次均匀化法的适用性.计算结果表明,考虑孔隙作用的多相、多尺度计算方法与水泥净浆试件的宏观弹模测试结果吻合良好,除多层次均匀化法外,其他复合材料均匀化方法的计算结果相近.

关键词： 点阵纳米压痕; 均匀化方法; 弹性模量; 多尺度

本文引用格式

陈小文, 韩宇栋, 丁小平, 侯东伟 . 水泥净浆弹性模量的纳米压痕表征与多尺度计算[J]. 上海交通大学学报, 2022 , 56(9) : 1199 -1207 . DOI: 10.16183/j.cnki.jsjtu.2021.089

Abstract

The calculation of multiscale elastic parameters of cementitious materials based on micromechanical tests and the composite material theory is one of the key theoretical bases for precise design of cementitious materials performance. In this paper, grid nanoindentation tests of microscopic elastic modulus and the mercury intrusion test were conducted on hardened cement paste specimens at different water-cement ratios, to establish a multiscale homogenization calculation method for the elastic modulus of cement paste considering the influence of pores. Besides, the applicability of the dilute method, the self-consistent method, the Mori-Tanaka method, the interaction direct derivation (IDD) method, and the multilevel homogenization method was compared. The results show that the multi-phase and multi-scale calculations considering the effect of pores is in good agreement with experimental values. Except the multi-level homogenization method, the calculation results of several commonly used composite homogenization methods are similar.

Key words： grid nanoindentation; homogenization method; elastic modulus; multiscale

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