*Article* **New Geometrical Modelling for 2D Fabric and 2.5D Interlock Composites**

**Mohamad Abbas Kaddaha 1,2, Rafic Younes 1,\* and Pascal Lafon <sup>2</sup>**


**\*** Correspondence: ryounes@ul.edu.lb

**Abstract:** A new geometrical modeling tool has been developed to predict the elastic stiffness properties of 2D orthogonal and 2.5D woven interlock composites. The model estimates the change in performance due to changes in the ordering weaving parameters of the 2.5D weave architecture. Analysis results were validated compared to other models developed in published articles and the literature. Numerical analysis was performed to evaluate the accuracy of the results from the proposed models. These results demonstrate the effectiveness of the models presented by comparisons with experimental results, showing that the model could replicate the mechanical behaviors of 2D fabric and 2.5D interlock composite laminates for predicting 2D textile structures and 2.5D interlock composites with different types, shapes, and conditions. The model presented in this paper is able to replicate the behavior of woven composites of fiber reinforced with various types.

**Keywords:** 2D fabric; 2.5D; interlock composite; compliance matrix; homogenization
