A two-scale damage model for high cycle fatigue delamination in laminated composites

Abstract

In this paper a model for predicting fatigue delamination growth in laminated composites under high cycle fatigue is proposed. The model uses the cohesive zone approach and a two-scale continuum damage mechanics model. The behavior of the interface material is considered quasi-brittle at the macro scale while plastic deformations are allowed at the scale of micro-defects. The validity of the proposed model is investigated through several standard tests using experimental data from literature. Good agreement between the numerical and experimental results is observed. The model is also capable of simulating fatigue under variable amplitude loading. This feature of model is shown through several sample simulations.

A modified cohesive zone model for fatigue delamination in adhesive joints: Numerical and experimental investigations

“…As these laminates were manufactured in-house their mechanical properties are not guaranteed to meet the specification of commercial Glare ® ; however the authors have observed comparable properties between the two materials in previous work [41][42][43]. Each GFRP layer had three plies with the layup [90 o /0 o /90 o ] and a cured ply thickness of 0.133 mm.…”

Report of Committee III.2: Fatigue and fracture

“…A cohesive zone-and two-scale continuum damage model are coupled to estimate delamination induced fatigue of polymer composites. At macro-scale, the response is considered to be elastic; at micro-scale elastoplasticity is involved and obtained using representative volume elements (Amiri-Rad et al, 2015).…”

Experimental investigation and multiscale simulation on the bending fatigue of SiCf/SiC composite vanes

“…There are still few researches accounting for the fatigue of composite structures. 35,36 In regard of numerical investigation, much work has been devoted to seeking high precision fatigue life prediction methods, [37][38][39][40][41][42] among which the progressive damage models 42 attract great attentions. Those models predict fatigue failure on the basis of one or more damage parameters related to observable damage mechanisms, such as fiber fracture, 43 matrix crack.…”