A new two-step modeling strategy for random micro-fiber reinforced composites with consideration of primary pores

This paper presents a novel procedure to evaluate mechanical properties of random micro-fiber reinforced composites with consideration primary pores. To this end, micro-CT experiment is conducted first detect micro-scale morphology the constituent materials, including size pores and arrangement fibers, etc. On basis, two-step modeling strategy proposed. In step, equivalent pore defects micro-fibers are determined by 3D parametric finite volume directly averaging micromechanics (FVDAM), which an ellipsoidal reinforcing phase composed fibers constructed. second embedded into matrix materials build RVE composite calculate elastic modulus composite. addition, FVDAM further extended simulate plastic deformation PEEK under quasi-static tensile loading. The results obtained from proposed have good agreement experiments.