Influence of fiber orientation on the mechanical responses of engineering cementitious composite (ECC) under various loading conditions

Journal article (2023)

Authors

Abdullah M. Tawfek Sana'a University, Shandong University
Zhi Ge Shandong University
Huaqiang Yuan Shandong University
Ning Zhang Tsinghua University
Hongzhi Zhang Shandong University
Yifeng Ling Shandong University
Yanhua Guan Shandong University
B. Šavija Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2023 Abdullah M. Tawfek, Zhi Ge, Huaqiang Yuan, Ning Zhang, Hongzhi Zhang, Yifeng Ling, Yanhua Guan, B. Šavija
Mechanical behavior Digital image correlation Crack width Engineering cementitious composite Fiber orientation
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Published Date

2023

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

The mechanical performance of engineered cementitious composite (ECC) depends greatly on fiber orientation and distribution. In this paper, the effect of fiber orientation on ECC's mechanical properties was investigated using two different casting methods: a flow-induced casting was used to enhance the fiber orientation within ECC mixture and compared with the conventional casting. The fiber orientation was quantified using scanning electron microscope (SEM) and image processing. Mechanical tests on the specimens with various fiber orientations were performed. The failure processes of ECC specimens under compression and tensile tests were analyzed using digital image correlation (DIC) technique. The proposed flow-induced casting enhanced the fiber alignment in the flow direction. Consequently, ECC's mechanical properties were significantly improved with more finer cracks under uniaxial loading. In conclusion, the proposed flow-induced casting can be adopted as an effective approach to improve fiber bridging efficiency in ECC.