Effets des défauts sur le comportement mécanique d'une structure fissurée

Abstract

This final year project focuses on the field of fracture mechanics, with the main objective of analyzing the effect of defects on the mechanical behavior of cracked structures. The presence of flaws—such as cracks, notches, or voids—either resulting from manufacturing processes or service conditions, can lead to high local stress concentrations that may critically affect structural integrity. To better understand and predict crack propagation, this work relies on the fundamentals of Linear Elastic Fracture Mechanics (LEFM), using key parameters such as the Stress Intensity Factor (K) .This parameter enable the quantification of a crack's severity and the evaluation of a material’s resistance to brittle fracture. This study highlights the importance of integrating fracture mechanics in the design phase to improve the reliability, safety, and durability of mechanical components, especially in critical applications.