Impact damage modeling in woven composites with two-level Parametrically-Upscaled Continuum Damage Mechanics Models (PUCDM)

This paper develops two-level parametrically-upscaled continuum damage mechanics (PUCDM) models for woven composites. The PUCDM models are thermodynamically consistent, micro-/mesostructure-integrated constitutive models that bridge length scales through explicit incorporation of lower-scale descriptors into coefficients. The level-1 PUCDM model features homogenized intra-yarn constitutive response of unidirectional composite SERVEs, while the level-2 PUCDM model reflects the upscaled effect of mesostructural RVE response. The functional forms of the coefficients are established through machine learning algorithms operating on a micro-/mesostructural response database. The highly efficient two-level PUCDM models are validated using ballistic impact experiments on S-2 glass/SC-15 epoxy woven composite plates with good agreement.