TY - JOUR
T1 - The influence of testing conditions on damage zone of concrete in Uniaxial Compression
T2 - Insights from Stereo-DIC and computational modeling
AU - Mehrpay, Saeid
AU - Hu, Xinyu
AU - Zhu, Zhongfeng
AU - Shumuye, Eskinder Desta
AU - Wan-Wendner, Roman
AU - Zhu, Miaochang
AU - Wang, Jiehui
AU - Wei, Zhenhua
AU - Ueda, Tamon
PY - 2025/5
Y1 - 2025/5
N2 - 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)
AB - 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)
KW - Concrete Strain Softening
KW - Friction at Loading Boundary
KW - Full Strain Field, Uniaxial Compressive Strength Test (UCT)
KW - Nonuniform Straining
KW - Stress-Strain Diagrams
UR - http://www.scopus.com/inward/record.url?scp=105003298010&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105003298010&origin=recordpage
U2 - 10.1016/j.matdes.2025.113981
DO - 10.1016/j.matdes.2025.113981
M3 - RGC 21 - Publication in refereed journal
SN - 0264-1275
VL - 253
JO - Materials and Design
JF - Materials and Design
M1 - 113981
ER -