Uniaxial compression performance of ECC based on numerical simulation
DOI:
https://doi.org/10.14311/CEJ.2026.01.0007Keywords:
ECC, FE model, PVA fiber, Uniaxial compression, Stress-strain curveAbstract
To investigate the influence of internal fibers in engineering cement-based composites (ECC) on its compressive properties, a two-dimensional distribution model of PVA fibers in the matrix was established through random placement and generation algorithms. The ECC finite element (FE) model was developed using ABAQUS, and the simulation outcomes were contrasted with the experimental stress-strain curves to validate the model's viability. On this basis, parameter analysis was carried out to study the impact of different PVA fiber content and length in ECC on its compressive characteristics under vertical axial compression, and the characteristic values of the stress-strain curves of ECC with differing PVA fiber content and length under vertical axial compression were analyzed. The findings indicate that the ECC containing 2% PVA fiber with a length of 12 mm exhibits optimal compressive strength, and the yield stress and peak stress can reach 47.25 MPa and 54.96 MPa, respectively. When the fiber content is below 2% and the length ranges from 10 mm to 12 mm, the yield stress and peak stress of ECC progressively rise with increasing fiber content and length. Conversely, when the fiber content exceeds 2% within the same length range, the yield stress and peak stress of ECC exhibit a declining trend as fiber content increases. This research offers a reference for the judicious choice of fiber content and length to enhance the compressive capabilities of ECC.
Received: 12.12.2024
Received in revised form: 19.07.2025
Accepted: 23.03.2026
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