Synergistic effects of interface slip and fiber fracture on stress-dependent mechanical hysteresis of SiC/SiC minicomposites. Issue 10 (2nd October 2020)

• Record Type: Journal Article
• Authors: Li, Longbiao
• Is Part Of: Composite interfaces. Volume 27:Issue 10(2020)
• Page Start: 937
• Page End: 951
• Publication Date: 2020-10-02
• Subjects: Ceramic-matrix composites (CMCs) -- Minicomposite -- Hysteresis loops -- Interface slip -- Fiber failure; Composite materials -- Periodicals; 620.11805
• DOI: 10.1080/09276440.2020.1715157
• Languages: English
• ISSNs: 0927-6440

Abstract

ABSTRACT: In this paper, the synergistic effects of interface slip and fiber fracture on stress-dependent mechanical hysteresis of SiC/SiC ceramic-matrix minicomposites (mini-CMCs) are investigated. Upon cyclic loading/unloading, the relative slip between the fiber and the matrix, and the fracture fiber affect the hysteresis behavior of mini-CMCs. The micro-stress field of the damaged mini-CMCs is obtained through shear-lag analysis, and cyclic loading/unloading hysteresis strain is related with the stress level, interface slip, and broken fiber. The effects of constituent properties and internal damage state on cyclic loading/unloading interface slip and hysteresis loops of SiC/SiC minicomposite are analyzed. The experimental matrix cracking density, stress-dependent mechanical hysteresis and interface slip of Hi-Nicalon TM, Hi-Nicalon TM Type S, and Tyranno TM ZMI SiC/SiC minicomposites are predicted. The interface debonding and slip range, and mechanical hysteresis loops of SiC/SiC minicomposites are affected by the stress level, constituent properties of the fiber volume, interface properties, and damage state of matrix cracking and broken fiber subjected to cyclic tensile loading.