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Investigations on fracture related properties of strain hardened concrete using digital image correlation and acoustic emission techniques
Different types of fiber reinforced concrete are being developed with the aim to improve the desired mechanical properties like tensile strength, strain carrying capacity and energy absorption capacity. Fracture characteristics of fiber reinforced concrete are quite different from conventional concrete and much more complicated when chemically active fibers, capable to the unique strain hardening properties due to both mechanical and chemical bond in heterogeneous medium, are incorporated. Characterization of such material, specifically fracture behaviour, is very important for better understanding of—and efficient design for—the material. In the present study, detailed investigations are carried out using the complementary image- and acoustic wave-based techniques to obtain the complete information on the fracture characteristics of the strain hardened concrete, as the conventional strain/displacement sensors may not completely capture the behavior due to heterogeneity and brittleness. Thorough analysis of acoustic parameters including clustering and image processing at different stages of damage are carried out. It is found that the major fracture characteristics like determining the location of crack formation, monitoring the crack propagation, fracture energy and most importantly, fracture process zone of fiber reinforced concrete, can be evaluated by the proposed technique as discussed and demonstrated in this paper.
Investigations on fracture related properties of strain hardened concrete using digital image correlation and acoustic emission techniques
Different types of fiber reinforced concrete are being developed with the aim to improve the desired mechanical properties like tensile strength, strain carrying capacity and energy absorption capacity. Fracture characteristics of fiber reinforced concrete are quite different from conventional concrete and much more complicated when chemically active fibers, capable to the unique strain hardening properties due to both mechanical and chemical bond in heterogeneous medium, are incorporated. Characterization of such material, specifically fracture behaviour, is very important for better understanding of—and efficient design for—the material. In the present study, detailed investigations are carried out using the complementary image- and acoustic wave-based techniques to obtain the complete information on the fracture characteristics of the strain hardened concrete, as the conventional strain/displacement sensors may not completely capture the behavior due to heterogeneity and brittleness. Thorough analysis of acoustic parameters including clustering and image processing at different stages of damage are carried out. It is found that the major fracture characteristics like determining the location of crack formation, monitoring the crack propagation, fracture energy and most importantly, fracture process zone of fiber reinforced concrete, can be evaluated by the proposed technique as discussed and demonstrated in this paper.
Investigations on fracture related properties of strain hardened concrete using digital image correlation and acoustic emission techniques
Sindu, B. S. (author) / Thirumalaiselvi, A. (author) / Sasmal, Saptarshi (author)
European Journal of Environmental and Civil Engineering ; 26 ; 6807-6829
2022-11-09
23 pages
Article (Journal)
Electronic Resource
Unknown
| Taylor & Francis Verlag | 2022
| British Library Online Contents | 2014
| British Library Online Contents | 2014