HIGH-FIDELITY DAMAGE ANALYSIS OF COMPOSITES USING A PLY-BASED CONTINUUM MODEL

The current work is based on the implementation of the CODAM2 intralaminar damage model in CUF-Explicit, an explicit nonlinear dynamics solver based on the Carrera Unified Formulation (CUF). The CODAM2 model is based on the concept of continuum damage mechanics, and stress-based failure criteria are used to determine the onset of damage. The damage progression makes use of the crack-band theory to scale the fracture energies, thus ensuring mesh objectivity. The structural modelling is performed using high-order 2D theories based on CUF. 2D elements are used to model the structural geometry, and 1D expansions based on Lagrange polynomials are used to define the thickness, resulting in a layer-wise modelling approach. Numerical assessments are performed considering single elements and tensile coupons. The results are in good agreement with reference numerical solutions and experimental data, thus verifying the current implementation.