Faqi Liu

Beihang University · Composites

Since advanced aircraft design requires thorough understanding of the mechanical properties and failure mechanism of ceramic matrix composites (CMC) typical structures, curved beams made of 2D woven C/C–SiC composite under four-point bending is investigated through experimental and numerical studies in this paper. Experiment results show that the a...

Fasteners made of carbon/carbon composites (C/Cs) have been developed for joining C/Cs components in high-temperature environment. A numerical damage model based on post-failure behavior was developed for simulating shear strength of 3D weave C/Cs fastener under several load angles. 3D pixel method was employed to simulate the heterogeneous damage...

Adhesive bonding technology is widely applied in the assembly and repair processes of composite laminates. However, the debond flaws existing in the adhesive layer weakens the load-carrying capacity of adhesively bonded structures. This article presents an analytical model to investigate the adhesive shear behaviour of double-lap joints containing...

Experiments and finite element analysis were carried out for the problem of open-hole sensitivity of 3D carbon/carbon composite material plates. Finite element models of the representative volume element and open-hole plates of 3D carbon/carbon composite were established. Transition method between macro-level stress and meso-level stress was given,...

A representative volume element (RVE) and shear specimen model of satin weave composite fastener is established and numerical model of prediction on effective elastic module is presented based on periodic boundary conditions. Cross-scale numerical simulation of shear failure in different load angle is implemented. The uniaxial shear tests of satin...

Experiments and finite element analysis were carried out for the problem of open hole sensitivity of 3D carbon/carbon composite material plates. Finite element models of the representative volume element (RVE), the intact plate and open-hole plates of 3D carbon/carbon composite were established. Transition method between macro level stress and meso...

Detailed sizes of threads in the satin weave composite fastener have reached the meso scale. It is not accurate to simulate the real failure mode if the uniform material is applied to the thread in the process of numerical simulation. For this problem, the finite element model of the fastener thread is established by stacking several layers of simp...

An offset representative unit cell (ORUC) is introduced to predict elastic properties of three-dimensional (3D) eight-harness satin weave composites both analytically and numerically. A curved beam model is presented based on minimum complementary energy principle, which establishes an analytical solution for elastic modulus and Poisson’s ratio cal...

Because of the complex meso-structure of satin weave composites, it is difficult to apply traditional methods to prediction on elastic properties. For this problem, the representative volume element (RVE) of satin weave composite was established and research on prediction on effective in-plane compression modulus and in-plane Poisson's ratio of the...