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<p>With the rising demand for sustainable and eco-friendly construction materials, coir fiber has been found to have special properties because of its renewability, ductility, and resistance to degradation by environmental factors. Although, many experimental works have proven the beneficial effects of coir fiber-reinforced concrete, but the effects of fiber orientation, damage development, and post-peak behaviour are yet to be analysed. To address these issues, the current research aims to provide a comprehensive three-dimensional finite element analysis of coir fiber-reinforced concrete using the Concrete Damage Plasticity (CDP) model. The fiber contents are kept as 1%, 2%, 3%, and 5% by mass of cement with fiber orientations of random, vertical, horizontal, and inclined under both compression and split tensile loading. Numerical analysis of concrete cylinders (150&#xa0;mm × 300&#xa0;mm) was performed using ABAQUS to analyze the stress-strain response, crack initiation, damage development, residual strength, and ductility. The outcome shows that the addition of coir fibers has a substantial positive effect on the control of cracks, stability, and energy absorption capacity without compromising the peak load. Vertically oriented fibers are more efficient in crack bridging showing a peak split tensile stress of approximately 4.4–4.5&#xa0;MPa at 3% fiber content while tensile strain capacity increased by 10–25% and damage rate decreased by about 40% compared with plain concrete. The optimal dosage of fibers is found to be 2–3%, beyond which the mechanical properties showed marginal improvement.</p>

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Performance evaluation of coir fiber-reinforced concrete (CFRC): a comparative study using finite element modelling

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Lalit Dhooriya,
  • Plaban Deb,
  • Sandip Mondal

摘要

With the rising demand for sustainable and eco-friendly construction materials, coir fiber has been found to have special properties because of its renewability, ductility, and resistance to degradation by environmental factors. Although, many experimental works have proven the beneficial effects of coir fiber-reinforced concrete, but the effects of fiber orientation, damage development, and post-peak behaviour are yet to be analysed. To address these issues, the current research aims to provide a comprehensive three-dimensional finite element analysis of coir fiber-reinforced concrete using the Concrete Damage Plasticity (CDP) model. The fiber contents are kept as 1%, 2%, 3%, and 5% by mass of cement with fiber orientations of random, vertical, horizontal, and inclined under both compression and split tensile loading. Numerical analysis of concrete cylinders (150 mm × 300 mm) was performed using ABAQUS to analyze the stress-strain response, crack initiation, damage development, residual strength, and ductility. The outcome shows that the addition of coir fibers has a substantial positive effect on the control of cracks, stability, and energy absorption capacity without compromising the peak load. Vertically oriented fibers are more efficient in crack bridging showing a peak split tensile stress of approximately 4.4–4.5 MPa at 3% fiber content while tensile strain capacity increased by 10–25% and damage rate decreased by about 40% compared with plain concrete. The optimal dosage of fibers is found to be 2–3%, beyond which the mechanical properties showed marginal improvement.