This study employs micromechanical modeling techniques to investigate the mechanical properties of a hemp/clay composite material. The composite, consisting of hemp fibers embedded in a clay matrix, is chosen for its environmental benefits and natural advantages, such as lightweight, strength, and stiffness. The research integrates localization and homogenization methodologies with the three-phase model to provide a comprehensive analysis of the composite's behavior. The theoretical model's findings are found to correlate well with empirical data, validating its effectiveness in capturing the composite's mechanical response. The study highlights the importance of hemp fibers in enhancing the composite's durability and resistance to environmental factors like moisture, temperature fluctuations, and UV exposure. The composite's mechanical properties, including its Young's modulus, Poisson's ratio, and shear modulus, are analyzed using the three-phase model. The results show that the effective shear modulus increases with the volume fraction of hemp fibers, aligning with the expected reinforcing effect. However, the effective Young's modulus decreases with increasing fiber volume fraction, indicating that the composite's stiffness may not increase linearly with fiber content due to factors such as fiber agglomeration and interface strength. The study concludes that the developed micromechanical approach successfully estimates the effective elastic properties of the hemp/clay composite, with the calculated Young's modulus closely matching experimental results across different fiber content ranges. This validation confirms the model's reliability for predicting the mechanical behavior of fiber-reinforced composites.This study employs micromechanical modeling techniques to investigate the mechanical properties of a hemp/clay composite material. The composite, consisting of hemp fibers embedded in a clay matrix, is chosen for its environmental benefits and natural advantages, such as lightweight, strength, and stiffness. The research integrates localization and homogenization methodologies with the three-phase model to provide a comprehensive analysis of the composite's behavior. The theoretical model's findings are found to correlate well with empirical data, validating its effectiveness in capturing the composite's mechanical response. The study highlights the importance of hemp fibers in enhancing the composite's durability and resistance to environmental factors like moisture, temperature fluctuations, and UV exposure. The composite's mechanical properties, including its Young's modulus, Poisson's ratio, and shear modulus, are analyzed using the three-phase model. The results show that the effective shear modulus increases with the volume fraction of hemp fibers, aligning with the expected reinforcing effect. However, the effective Young's modulus decreases with increasing fiber volume fraction, indicating that the composite's stiffness may not increase linearly with fiber content due to factors such as fiber agglomeration and interface strength. The study concludes that the developed micromechanical approach successfully estimates the effective elastic properties of the hemp/clay composite, with the calculated Young's modulus closely matching experimental results across different fiber content ranges. This validation confirms the model's reliability for predicting the mechanical behavior of fiber-reinforced composites.