Micromechanical modelling of layered systems containing titanium alloy andtitanium MMC subjected to bending

The mechanical behaviour of layered systems, consisting of layers of monoli thic titanium alloy, (IMI834) and titanium metal matrix composite, (Ti-MMC) is examined. A finite element based micromechanical model,vas developed to investigate the mechanical response of the systems subjected to four point bending. Two types of layered systems were examined: the first designated as C type with Ti-MMC in the centre of the beam, and IMI834 on the outside, and an S type which consists of a Ti-MMC layer on the outside and IMI834 o n the inside. A representative volume element (RVE) was defined and boundar y conditions imposed to simulate bending of the layered systems. While the S type system exhibited higher stiffness and linear behaviour up to fractur e, the C type system exhibited more ductile behaviour prior to fracture. Th e overall predicted behaviour of the two systems was in good agreement with experimental results, MST/4545.