Test study and numerical simulation of dynamic tensile mechanical properties of ECC

被引：0

作者：

Li X. ^{[1
]}

Luo Y. ^{[1
]}

Cui Y. ^{[1
]}

Fu X. ^{[1
]}

Cai T. ^{[1
]}

机构：

[1] Department of Military Facilities, Army Logistics Academy of PLA, Chongqing

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 09期

关键词：

destructive form; energy consumption; engineered cementitious composites (ECC); impact split stretch; split Hopkinson pressure bars ( SHPB );

D O I：

10.13465/j.cnki.jvs.2023.09.018

中图分类号：

学科分类号：

摘要：

Here，based on a separated split Hopkinson pressure bars ( SHPB ) device，impact splitting tensile tests of matrix material and engineered cementitious composites ( ECC ) with different fiber contents were conducted within 4 strain rate ranges of R1 (5.8-6.9 s-1) , R2 (9.7-13.3 s-1) , R3 (14.4-18.9 s-1) and R4 (19.2 -28.5 s-1), respectively to explore dynamic mechanical properties of matrix material and ECC under different strain rates and effects of fiber content on mechanical properties of ECC. Test results showed that dynamic splitting tensile strengths of matrix material and ECC have a significant strain rate enhancement effect; when fiber content is less than 2. 3% , there is a positive correlation between fiber content and dynamic splitting tensile strength ; the energy absorption capacity of matrix material is related to fracture morphologies of specimens ; with increase in fiber content, ECC fracture degree decreases and microcracks increase; the strain rate effect of ECC is corrected by fitting test data, and the modified model is embedded in LS-DYNA. Based on the new model established, the whole process of tests was numerically simulated and analyzed. The numerical simulation results showed that compared with test data, the maximum error of simulation results is 8%，and the minimum error is 2. 3%，failure morphologies of specimens in simulation agree better with those in tests ; the new established ECC material model can better represent dynamic tensile properties of ECC. © 2023 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：160 / 167and188

共 15 条

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