Influence of Fiber Orientation on the Elastic Limit Tensile Stress of UHPFRC
The elastic limit tensile stress of UHPFRC is governed by contributions of the cementitious matrix and the fibrous skeleton. This paper finds that fiber orientation has significant influence on the matrix tensile strength of UHPFRC, while this is not considered in the estimation of elastic limit tensile stress. An original relation model between fiber orientation and the elastic limit tensile stress is proposed. Uniaxial tensile tests have been conducted on five dumbbell-shaped specimens, whose local fiber volume and orientation were determined using a magnetic probe before testing. Based on the measurement results of digital image correlation, acoustic emission and displacement transducers, the tensile response is characterized in detail. Based on the results of local fiber distribution, the influence of fiber orientation on the elastic limit tensile stress will be discussed, showing that the proposed relation model can well explain the variation of matrix tensile strength and estimate the elastic limit tensile stress of UHPFRC.
Keywords: tensile strength, fiber orientation
How to Cite:
Zhan, J., Denarié, E. & Brühwiler, E., (2023) “Influence of Fiber Orientation on the Elastic Limit Tensile Stress of UHPFRC”, International Interactive Symposium on Ultra-High Performance Concrete 3(1): 142. doi: https://doi.org/10.21838/uhpc.16742
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