Modelling VARTM process induced variations on bending performance of composite Omega beams

Abstract

Finite element simulation with cohesive contact is presented, to correlate the vacuum assisted RTM process and the bending performance of Omega beams. The model considers the process induced variations, including part thickness, resin rich pockets and voids. The bending performance prediction relies on cohesive contact to model delamination initiation and propagation. Computing efficiency is achieved by mesh scaling. The modelling approach applies to three variations of Omega beams with the different mode-mixture ratios.The finite element predictions result in a high degree of agreement with the experimental measurements.

Experimental and numerical investigation of interface damage in composite L-angle sections under four-point bending

“…The CZM method has been successfully employed to model structures of different complexities, ranging from simple beams for model validation 14–16 to applications on complex composite structures. 17–19…”

“…The CZM method has been successfully employed to model structures of different complexities, ranging from simple beams for model validation [14][15][16] to applications on complex composite structures. [17][18][19] The CZM is currently the mostly widely used method to model delamination in composite structures due to its widespread implementation in commercial FE solvers. However, care should also be taken when using the CZM method because of its multiple model parameters 20 and mesh dependency effect.…”