DIC2Abaqus: Calculating mixed-mode stress intensity factors from 2D and 3D-stereo displacement fields

Evaluating the conditions for crack propagation under static and cyclic loads is critical for predicting the lifespan of engineering components, particularly in the energy and transport industries. Digital Image Correlation (DIC) provides precise displacement field measurements that can be used to calculate strain energy release rates and stress intensity factors (SIFs), but integrating DIC data into computer-aided engineering (CAE) software like Abaqus, a widely used finite element package, remains challenging. This paper introduces DIC2Abaqus, a freely available MATLAB-based tool that automates DIC data processing in Abaqus to extract material properties in isotropic and anisotropic elastic and elastoplastic materials. It employs the J-integral and interaction integral methods to compute mixed-mode SIFs, including mode III, without requiring a predefined specimen geometry or applied loads. It supports 2D and 3D-stereo DIC data and streamlines the process from geometry creation to job submission and post-processing. Validation against analytical and experimental results confirms its accuracy and reliability. By taking fracture mechanics analyses beyond ISO and ASTM standards, DIC2Abaqus offers a versatile, efficient, and accessible simulation tool for industry, research, and education.