Tensile Properties of SMA/PVA Hybrid Fiber Reinforced Cementitious Composites

In order to study the tensile properties of shape memory alloy/polyvinyl alcohol‑engineening cement‑based composite materials（SMA/PVA‑ECC），uniaxial tensile test were carried out，and the damage phenomena，stress‑strain curves and characteristic parameters of the SMA/PVA‑ECC specimens were analyzed，and the effects of SMA fibers content and diameter were compared. The results show that the residual crack widths of SMA/ PVA‑ECC specimens are significantly reduced after unloading. The content and diameter of SMA fiber have significant effects on the tensile properties of the specimens. Compared with the engineering cement‑based composite materials（ECC）specimens，the comprehensive tensile properties of the specimens with 0.2 mm fiber diameter and 0.2% fiber content are the best，and the initial cracking strength，ultimate tensile stress and ultimate tensile strain are increased by 56.4%，23.6% and 13.4%，respectively. © 2023 Tongji University. All rights reserved.