Progressive damage analysis and strength properties of fiber-bar composites reinforced by three-dimensional weaving under uniaxial tension

摘要

A new geometric model is reported for fiber-bar composites reinforced by three-dimensional weaving (FBCR3DW) having 0/90, 45/135 and 0/90/45/135 weavings. An anisotropic progressive damage analysis model is proposed based on the Hashin-type failure criterion and the Murakami-Ohno damage theory, with shear nonlinearity considered in the stiffness matrix of the yarn and fiber-bar. Finite element models coupled with a progressive damage analysis model were developed to study the progressive damage behavior and strength properties under uniaxial tension. A cohesive zone model was adopted to evaluate the effect of the strength of the interface between the matrix and the fiber-bar on the tensile properties of the FBCR3DW. Several specimens were prepared and used in tensile testing. The stress-strain curves and strengths obtained by the numerical simulations were in good agreement with the experimental results. The failure mechanisms of the composites were revealed in the simulation studies. The numerical results showed that the main damage modes of FBCR3DW were matrix damage, yarn transverse damage and yarn longitudinal breakage, which were in good agreement with the experimental findings. (C) 2016 Elsevier Ltd. All rights reserved.