Open AccessA multi-scale method for predicting the properties of 3D braided composite under three-point bending load
Author(s) -
Guoqing Yu,
Boqiang Shi,
Yanhua Shen
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac1449
Subject(s) - mesoscopic physics , homogenization (climate) , finite element method , materials science , bending , stiffness , structural engineering , modulus , scale (ratio) , stiffness matrix , composite material , physics , engineering , quantum mechanics , biodiversity , ecology , biology
A more versatile and efficient multi-scale coupling finite element method for researching the mechanical response of 3D braided composites under three-point bending load is represented in this paper. In the mesoscale, the multiphase representative unit-cell models are established to describe the mesoscopic structure which consists of braiding yarns and matrix. In the macroscale, the unit-cells are regarded as homogeneous material, and the load and constraint conditions are applied on the macroscopic structure model. The multi-scale homogenization theory is introduced to calculate the equivalent stiffness matrixes of mesoscopic unit-cells and build the mathematical relationships between the mesoscopic stress fields and the macroscopic strain fields. According to the element damage criterion, the bending modulus and ultimate load-bearing ability of 3D braided composites are predicted by simulating the progressive damage process of unit-cells Comparing with the experimental result, the predicted result satisfies the required precision for engineering.