The influence of testing conditions on damage zone of concrete in Uniaxial Compression: Insights from Stereo-DIC and computational modeling

Saeid Mehrpay, Xinyu Hu, Zhongfeng Zhu, Eskinder Desta Shumuye, Roman Wan-Wendner, Miaochang Zhu, Jiehui Wang, Zhenhua Wei*, Tamon Ueda*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Abstract

With recent advances in non-contact optical measurement techniques, studying the response of concrete materials under specific mechanical loading conditions is evolving toward obtaining full deformation fields and mesoscopic mechanisms. Such data fields can be used to validate and improve theories and computational models of concrete-like materials. In this research, a commercial stereo DIC is used to acquire concrete's deformation field in the Uniaxial Compression Test (UCT) to study the influence of loading conditions on the distribution of strains and the collected stress–strain responses. Specimens are grade C25 cylinders and prisms with an aspect ratio of 2 cast parallel to loading direction. Three conditions: ends’ constraint, low friction, and nonuniform straining are investigated experimentally and numerically. Obtained holistic data fields demonstrate the dependency of the outcomes on the location and length of conventional gauges. For instance, the snap-back mechanism can be related to the arrangement of measuring devices and local effects. Moreover, it is shown how nonuniform straining impacts the behavior of the material. Isolating different effects by numerical simulations showed how the interaction of effects (such as friction and seated block) leads to misleading observations. Besides computational modeling acquired data aid in understanding stress–strain relationship variations and conducting reliable tests. © 2025 The Author(s)
Original languageEnglish
Article number113981
JournalMaterials and Design
Volume253
Online published21 Apr 2025
DOIs
Publication statusPublished - May 2025

Funding

The corresponding author (Zhenhua Wei) would like to appreciate funding support from the National Natural Science Foundation of China (Grant No. 52471288 ), Guangdong Basic and Applied Basic Research Foundation (Grant No. 2024A1515011026 ), and Shenzhen Science and Technology Program (Grant No. JCYJ20220530115407016 ). The third author (Zhongfeng Zhu) would like to appreciate funding from the National Natural Science Foundation of China (Grant No. 52108230 ). The authors are also grateful for the support from Shenzhen Key Laboratory for Low-carbon Construction Material and Technology.

Research Keywords

  • Concrete Strain Softening
  • Friction at Loading Boundary
  • Full Strain Field, Uniaxial Compressive Strength Test (UCT)
  • Nonuniform Straining
  • Stress-Strain Diagrams

Publisher's Copyright Statement

  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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