# Use of Cohesive Approaches for Modelling Critical States in Fibre-Reinforced Structural Materials

## TL;DR

This paper explores how cohesive approaches can model damage and crack growth in fiber-reinforced materials to improve structural predictions.

## Contribution

The study introduces cohesive approaches combined with modified finite element methods for accurate modeling of damage in fiber composites.

## Key findings

- Cohesive elements effectively model energy release at crack fronts in fiber-reinforced materials.
- Combining cohesive approaches with modified FEM improves accuracy in predicting structural damage.
- The methods show promise for practical applications in structural material analysis.

## Abstract

During the operation of structures, stress and deformation fields occur inside the materials used, which often ends in fatal damage of the entire structure. Therefore, the modelling of this damage, including the possible formation and growth of cracks, is at the forefront of numerical and applied mathematics. The finite element method (FEM) and its modification will allow us to predict the behaviour of these structural materials. Furthermore, some practical applications based on cohesive approach are tested. The main effort is devoted to composites with fibres and searching for procedures for their accurate modelling, mainly in the area where damage can be expected to occur. The use of the cohesive approach of elements that represent the physical nature of energy release in front of the crack front has proven to be promising not only in the direct use of cohesive elements, but also in combination with modified methods of standard finite elements.