水泥砂浆应变率效应研究

Translated title of the contribution: Study on the Strain Rate Effect of Cement Mortar

Zheng Wen Yang, Jin Zhu Li, Feng Lei Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To investigate the influence of strain rate on stress-strain relation and dynamic strength, uniaxial compression strength, elastic modulus and poisson's ratio of mortar were measured by quasi-static experiments. The one-dimensional stress experiment was carried out by using split Hopkinson pressure bar(SHPB), dynamic damage and stress-strain relation of the cement mortar with various length-diameter ratios at different loading rates were obtained, and the relation of DIF(dynamic strength increase factor) and strain rate was studied. The results show that dynamic compressive strength increases significantly with increasing strain rate. The DIF with thin specimens are smaller than those with thick specimens when diameters are the same, but length-diameter ratios are different. By comparing the recovered specimens, as the strain rate increases, the damage of the specimen increases, and the fragment size decreases. It is found that the failure energy increases with the growing of the strain rate.

Translated title of the contributionStudy on the Strain Rate Effect of Cement Mortar
Original languageChinese (Traditional)
Pages (from-to)571-577
Number of pages7
JournalBeijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
Volume39
Issue number6
DOIs
Publication statusPublished - 1 Jun 2019

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