Multiscale Modeling of SiCf/SiC Nuclear Fuel Cladding Based on FE-Simulation of Braiding Process

Frontiers in Materials

Gang Zhao¹  Qing Huang¹  Maik Gude¹  Jianbo Tang¹  Yajie Feng²  Andreas Hornig²  Jun Wang²  Jian Xu³  Chao Zhang³  Xigao Jian⁴  Shiqing Xin⁵  Nianwei Shang⁶ 

[1] Engineering, CAS, Ningbo, China;;Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Material Technology &Institute of Lightweight Engineering and Polymer Technology, Technische Universität Dresden, Dresden, Germany;School of Computer Science and Technology, Shandong University, Qingdao, China;State Key Laboratory of Fine Chemicals, Liaoning High Performance Polymer Engineering Research Center, School of Chemical Engineering, Dalian University of Technology, Dalian, China;University of Chinese Academy of Sciences, Beijing, China;

关键词: nuclear fuel cladding;    multiscale model;    phase field method;    Mohr–Coulombs criterion;    SiCf/SiC composite;   

DOI  :  10.3389/fmats.2020.634112

来源: DOAJ

【 摘 要 】

A generalized multiscale (micro-macro) finite element (FE) model for SiC-fiber reinforced SiC-matrix ceramic (SiCf/SiC) nuclear fuel claddings is established. In the macro level, the solid mesh of braided preform, which can be tailored by machine settings (braid angle, yarn width, and so on), is generated based on the braiding process simulation using the dynamic FE-solver, hiring the contact constraints. The matrix mesh and the yarn mesh are integrated by the embedded region constraint, with which the meshing difficulties can be avoided. In the micro-UD model, the progressive damage of the ceramic matrix is modeled using the phase field method (PFM) and the fracture is captured by Mohr–Coulombs criterion, which are stable and efficient in the description of the brittle crack initiation, coalition, and branching. Based on this multiscale model, the mechanical behavior of the braided SiCf/SiC nuclear fuel cladding tube is studied in detail. The superiorities over the homogenized tube model are demonstrated, too.

【 授权许可】

Unknown