Two-Step Homogenization of Elasto-Plastic Responses of Csf/Mg Composites

In this work, Csf/Mg composites are fabricated using a liquid-solid extrusion following vacuum pressure infiltration technique, and the elasto-plastic responses of the composites are then tested. Experimental tests are time and cost inefficient, and the two-step Mean-Field homogenization (MFH) method with the tangent formation is thus developed to predict the elasto-plastic responses of the composites efficiently. In the proposed method, an RVE of the composites is decomposed into a series of peuso-grains based on fiber orientation, and the Mori-Tanaka (MT) model with the tangent formation is used to predict the elasto-plastic response of each peuso-grain, following by averaging the elasto-plastic responses of all the peuso-grains using the Voigt model. Consequently, the two-step MT/Voigt MFH model is established to predict the elasto-plastic responses of the composites. Compared with the experimental tests and the FE homogenization method, the two-step MFH method and the related model are validated to be capable of efficiently predicting the elasto-plastic responses of the composites.