Open AccessMicromechanics Analysis of Elastic Properties of Flexible Matrix TWF Composites
Author(s) -
Yichen Li,
Yanping Song,
Fei Hu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/688/3/033046
Subject(s) - micromechanics , materials science , composite material , homogenization (climate) , stiffness , composite number , elastic modulus , representative elementary volume , finite element method , periodic boundary conditions , boundary value problem , structural engineering , microstructure , biodiversity , ecology , mathematical analysis , mathematics , engineering , biology
Using carbon fibers triaxial woven fabric (TWF) as a reinforcing material and compounding with a suitable flexible matrix material to form a composite shell film structure. It is a new type of high precision deployable antenna implementation. In this paper, the elastic properties of TWF composites using silicone rubber are studied. Using the micromechanics method, the three-dimensional unit cell characterizing the structural properties of the braided composite material is carried out. Homogenization finite element analysis will ultimately yield the elastic modulus of the entire composite. Firstly, considering the fiber bundle interlacing, the unit cell is finely geometrically modelled. Next, the unit cell is analyzed by finite element and periodic boundary conditions are applied. The method of homogenization is used to obtain the volume average stress and strain through six independent loading analysis, and the stiffness matrix is obtained, and the engineering constant is finally obtained. Finally, the effect of fiber volume fraction on elastic properties is analyzed. At present, there are few researches on flexible matrix TWF composites at home and abroad. The research on the elastic properties of the material has laid a solid foundation for further research on the performance of the material in the future.