The energy absorbed during crushing of composite structures is stronglydependent on the layup, fiber architecture and type of resin used. Modeling of thecrash behavior of composites is therefore highly influenced by the composite materialsystem chosen, and current constitutive models must be improved to include/accountfor the inherent properties from the manufacturing step.The ultimate goal of this contribution is to optimize the material system andmanufacturing method for the required crushing performance in terms of energyabsorption and cost. A first outcome of the study will be to provide informationregarding the properties of the final manufactured composite material such as residualstresses and effects of defects. These properties are then used in the development ofcrash models. A robust link between manufacturing, experiments and crushingsimulations is vital where there should be a generic routine towards the data transferand constitutive models. The study of effects of defects will affect the input data intothe material and constitutive models in form of change in strength and stiffnessproperties of the material.In this contribution, an experimental study on the material response under quasistaticcrushing is performed where the manufacturing effects on the material propertiesare considered based on estimated data provided from vacuum infusion simulation.The crushing simulations are performed with ABAQUS where the material modeldeveloped in-house, which is a physically based damage model based on the LaRC05failure criterion and progressive damage, is chosen to model the constitutive behavior.The parameters that are transferred to the system from manufacturing simulation arefiber content and voids. Consideration of these parameters into the constitutivebehavior of the structure will directly influence the structural response. A parametricstudy is completed and results are discussed.
展开▼
