On the Feasibility of a Three-Point Bending Setup for the Validation of(Fatigue)Damage Models for Thin Composite Laminates

摘要

After developing a damage model,validation of this model is a necessity.This validation should preferably be done under loading conditions which are different from the ones used for the development of the model.This study investigates whether a three-point bending setup is suited for the validation of fatigue material models for thin fiber-reinforced composites with a low bending stiffness,developed in uniaxial loading conditions.First,the three-point bending setup,which can be used for both single-sided and fully reversed loading,is discussed.Then,some results of experiments are presented.This is followed by the numerical modeling of the bending setup.It may be concluded that the three-point bending setup,although with very interesting loading conditions,is not ideally suited for model validation,due to the complicated and time-consuming numerical simulation.The material used for this study was a carbon fabric-reinforced poly-phenylene sulphide.