This paper presents a finite element method for modeling crack growth without remeshing. The method enriches the standard displacement-based approximation near the crack tip by incorporating both discontinuous fields and near-tip asymptotic fields through a partition of unity method. This allows the entire crack to be represented independently of the mesh, eliminating the need for remeshing during crack growth. The technique is demonstrated through numerical experiments, showing its utility and robustness. The paper includes a detailed formulation of the governing equations, discretization, numerical integration, and stress intensity factor evaluation. Several numerical examples are provided to validate the method, including robustness analysis, shear edge crack, angled center crack, and crack growth in a plate with cracks emanating from two holes. The results show excellent accuracy and domain independence, making the method suitable for complex geometries and fatigue crack growth calculations.This paper presents a finite element method for modeling crack growth without remeshing. The method enriches the standard displacement-based approximation near the crack tip by incorporating both discontinuous fields and near-tip asymptotic fields through a partition of unity method. This allows the entire crack to be represented independently of the mesh, eliminating the need for remeshing during crack growth. The technique is demonstrated through numerical experiments, showing its utility and robustness. The paper includes a detailed formulation of the governing equations, discretization, numerical integration, and stress intensity factor evaluation. Several numerical examples are provided to validate the method, including robustness analysis, shear edge crack, angled center crack, and crack growth in a plate with cracks emanating from two holes. The results show excellent accuracy and domain independence, making the method suitable for complex geometries and fatigue crack growth calculations.