Maximum aggregate size effects on the evolution of the FPZ and crack extensions in concrete-Experimental and numerical investigation

被引：12
作者：
Boukais, Amar [1 ]
Dahou, Zohra [1 ]
Matallah, Mohammed [2 ]
机构：
[1] Univ Tahri Mohamed Bechar, LMS Lab, BP 417, Bechar, Algeria
[2] Univ Tlemcen, RISAM Lab, BP 230, Tilimsen, Algeria
来源：
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2023年 / 269卷
关键词：
Aggregate size; Bending test; Acoustic emission; Mesoscale modeling; Fracture process zone; Crack extension; R; -curve; FRACTURE PROCESS ZONE; DIGITAL IMAGE CORRELATION; ACOUSTIC-EMISSION; R-CURVE; ENERGY; LENGTH; BEHAVIOR; DAMAGE; BRITTLENESS; PERFORMANCE;
D O I：
10.1016/j.ijsolstr.2023.112181
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this paper, an experimental/numerical investigation is proposed to study the effect of maximum aggregate size (Dmax) on the fracture process zone (FPZ) length variations and the crack extension. Experimentally, three-point bending tests have been realized on plain concrete with different maximum aggregate sizes under crack mouth opening displacement (CMOD) control. The crack growth is monitored using the acoustic emission (AE) tech-nique. The numerical investigation is conducted at a mesoscale level. From the evolution of cohesive tangential stresses along the crack path, the variation of FPZ is explored. The crack extensions are investigated using the equivalent linear elastic fracture mechanics approach (LEFM) to investigate the R-curves. The results show a great influence of the maximum aggregate size both on the FPZ variation and on the global behavior.
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页数：17
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