An Evaluation of the ~*FABRIC Material Model in ABAQUS/EXPLICIT for Composite Preforming Analysis Suitability

摘要

Carbon fiber composites are becoming important in addressing global designchallenges. To support the use of carbon fiber composites, modeling of the fabricpreforming is an important tool. In this work, the existing *FABRIC material model inABAQUS®/EXPLICIT was evaluated for composite preforming analysis suitability.Specifically, picture frame and bias-extension fabric in-plane shear characterizationtests and deep-drawing preforming tests using a hemisphere and an in-house squareclamping tool were simulated using this material model. This *FABRIC materialmodel employs shell or membrane elements to capture the wrinkling of fabric in asmeared fashion and track the shear angle change during analysis. Reasonably goodprediction-experiment correlations of shear angle changes and loading curves wereachieved for both of the material in-plane shear characterization tests; i.e., pictureframe and bias-extension tests. However, the accuracy in the predicted loaddisplacementcurves for the hemisphere deep-drawing preforming tests was found tovary with the fiber orientation relative to the clamping tool. Hypotheses attributing tothe deviation are discussed. All the material inputs can be determined in advance fromwell-established physical tests. Despite its modeling efficiency advantage, thismaterial model was only valid for materials that exhibit two “structural” directions.