Rate-Dependent Cohesive Models for Dynamic Mode I Interfacial Propagation and Failure of Unidirectional Composite Laminates

With the increasing application of composite materials in anti-impact structure, development reliable rate-dependent interlaminar constitutive model becomes necessary. This study aims to assess and evaluate applicability three types cohesive models (logarithmic, exponential power) numerical delamination simulation, through comparison with dynamic test results double cantilever beam (DCB) specimens made from T700/MTM28-1 laminate. Crack propagation length history profiles are extracted calibrate models. contours fracture toughness data predicted, compared investigate difference different The variation zone force implemented is also investigated. suggest that crack can be better predicted by logarithmic power Although well calculated tends higher than experimental measured results. show differences prediction maximum loading forces. this work provide useful guidance for more efficient interface failure simulation impact problems.