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Experimental Investigation of the Mechanical Behaviour of the Textile/Matrix Interface of Cementitious Matrix Composites
This paper discusses the mechanical behaviour of the textile/matrix interface of Textile Reinforced Cementitious Matrix Composites (TRCMC) subjected to tensile loading. This behaviour is obtained by the experimental identification of the shear stress distribution at the interface level. For this purpose, optical fibre strain sensors are embedded in the core of the TRCMCs to measure the normal strain of the two TRCMC components. Given the millimetric spatial resolution of these sensors, the strain distribution of the TRCMC in the direction of the applied load is obtained, thus allowing the identification of the crack location, the load transfer length as well as the behaviour of the matrix and the textile at all points. From these experimental results and based on a mechanical analysis, the evolution of the shear stress at the textile/matrix interface is deduced. Two reinforcement ratios were studied: a specimen reinforced with a single layer of textile, and a second one reinforced with three layers of textile. A relationship was established between the interface stress, load transfer length, matrix behaviour and reinforcement ratio. This study allows, on the one hand, a better understanding of the cracking behaviour of this type of composite, and on the other hand, improve existing analytical models by implementing the obtained experimental results.
Experimental Investigation of the Mechanical Behaviour of the Textile/Matrix Interface of Cementitious Matrix Composites
This paper discusses the mechanical behaviour of the textile/matrix interface of Textile Reinforced Cementitious Matrix Composites (TRCMC) subjected to tensile loading. This behaviour is obtained by the experimental identification of the shear stress distribution at the interface level. For this purpose, optical fibre strain sensors are embedded in the core of the TRCMCs to measure the normal strain of the two TRCMC components. Given the millimetric spatial resolution of these sensors, the strain distribution of the TRCMC in the direction of the applied load is obtained, thus allowing the identification of the crack location, the load transfer length as well as the behaviour of the matrix and the textile at all points. From these experimental results and based on a mechanical analysis, the evolution of the shear stress at the textile/matrix interface is deduced. Two reinforcement ratios were studied: a specimen reinforced with a single layer of textile, and a second one reinforced with three layers of textile. A relationship was established between the interface stress, load transfer length, matrix behaviour and reinforcement ratio. This study allows, on the one hand, a better understanding of the cracking behaviour of this type of composite, and on the other hand, improve existing analytical models by implementing the obtained experimental results.
Experimental Investigation of the Mechanical Behaviour of the Textile/Matrix Interface of Cementitious Matrix Composites
Lecture Notes in Civil Engineering
Benmokrane, Brahim (editor) / Mohamed, Khaled (editor) / Farghaly, Ahmed (editor) / Mohamed, Hamdy (editor) / Saidi, Mohamed (author) / Gabor, Aron (author)
8th International Conference on Advanced Composite Materials in Bridges and Structures ; Chapter: 51 ; 441-447
2022-09-27
7 pages
Article/Chapter (Book)
Electronic Resource
English