Multi-scale damage modeling of 3D orthogonal woven carbon-carbon composite at elevated temperatures

• Published in: Journal of thermal stresses Vol. 42; no. 6; pp. 787 - 800
• Main Authors: Shigang, Ai, Yinwei, Ma, Daining, Fang
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 03.06.2019; Taylor & Francis Ltd
• Subjects: Boundary conditions; Carbon; Carbon-carbon composites; Carbon/Carbon composite; Computer simulation; Damage assessment; High temperature; Mathematical models; Mechanical properties; Mesoscale phenomena; multi-scale modeling; Multiscale analysis; progressive damage; Scale models; Stress propagation; Structural damage; tensile strength; Textile composites; Three dimensional composites; Three dimensional models
• ISSN: 0149-5739; 1521-074X
• DOI: 10.1080/01495739.2019.1593906

This paper presents a multi-scale structure modeling scheme to analyze the damage behaviors of three-dimensional orthogonal Carbon/Carbon (C/C) composites subject to uniaxial tension at high temperatures. The multi-scale structure model includes a micro-scale and a meso-scale structure model with periodic boundary conditions to homogenize the heterogeneous fiber/matrix system into unit cells. The micro-scale model predicts the mechanical properties at the fiber tow scale in the three orthogonal directions (x, y and z). The output results by the micro-scale simulations are then incorporated in the meso-scale model to demonstrate the locations of stress propagation and the progressive failure behavior of the 3D C/C composite. Based on the numerical approaches, uniaxial tensile strengths of the 3D C/C composite are calculated from 300 to 2500 K, and its temperature dependences are discussed. The current applied multi-scale models provide an efficient approach to predict the tensile strength of 3D textile composites, and will give some highlights for the design of 3D C/C composite components.