3D FEM simulation of mechanical property of compositesreinforced by both particles and fibers

In order to investigate the relation between mechanical property and microst ructure of in2si tu synthesized Ti mat rix composites reinforced by both short-fiber-like TiB and particle-like TiC , a 3D cell model was developed on the basis of the RSA ( Random Sequential Adsorption) method , according to observed microst ructures.This model can be used to generate a multi2inclusion cell with both randomly dist ributed short -fiber -like and theparticle-like reinforcement s , and that the aspect ratio of short-fiber-like reinforcement s and the dist ribution rule canbe arbit rarily set . While compared with the experimental result s , the simulation result s obtained using this modelare relatively accurate. The result s show that : in the short-fiber-like reinforcement s , the ones parallel to the direc2tion of the applied st ress bear the most st ress , while the ones at an angle of about 45 degrees with the direction ofthe applied st ress bear the least . The particle-like ones bear much less st ress than the short-fiber-like ones parallelto the direction of the applied st ress. The st ress in the mat rix is higher in the local where the reinforcement s arecompact along the direction of the applied st ress.