A novel surrogate modeling strategy of the mechanical properties of 3D braided composites

Liu, Zeyi; Hou, Yuliang; Zhao, Qiaoli; Li, Cheng

doi:10.1016/j.cja.2020.05.017

Cited by 12 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Determining the spatial direction of the fiber yarn is the premise for determining the direction cosine. On the other hand, in the case of perform molding or material loading, fiber yarns will be twisted and deformed [20], affecting the macroscopic mechanical properties of the material [8,16,21] and the micro-stress state [15,[22][23][24]. Only properly characterizing this deformation and establishing the quantitative relationship between the geometric parameters of fiber yarns and the braiding process parameters, can the actual mechanical state of the material be more truly reflected.…”

Section: Introductionmentioning

confidence: 99%

Key issues in microstructure modeling of 3D braided composites

Wang

Liu

Zhao

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

Numerical analysis based on micromechanics is an effective method to study the mechanical properties of three-dimensional (3D) braided composites, in which the establishment of micromechanics model is the basis of mechanical analysis. The direction cosine of fiber yarns and the characterization of geometric parameters of microstructure are two key issues in the modeling of microstructure. Focusing on these two key issues, the three-cell model of 3D four-directional braided composites are studied to comprehensively analyze various spatial directions of fiber yarns in the 45°division and horizontal division of unit cell, so as to obtain the detailed fiber yarn direction cosine. Aiming at the cross sections of three types of fiber yarns, the complex relationship between the braiding process parameters and the geometric parameters of the unit cell is analyzed and deduced. The unitcell structure is quantitatively characterized by using the braiding process parameters as the initial parameters, and the calculation methods of the volume fraction of fiber yarns and yarn filling coefficient are obtained. Finally, the predicted elastic constants by stiffness-volume averaging method are compared with experimental results, demonstrating the analysis results of fiber yarns directions. This paper can provide a theoretical reference for the microstructure modeling of 3D multi-directional braided composites, and has certain practical value in engineering.

show abstract