Analysis of failure mechanisms of Oxide - Oxide ceramic matrix composites

被引:30
作者
Ramachandran, Karthikeyan [1 ]
Leelavinodhan, Subhashree [1 ]
Antao, Christian [1 ]
Copti, Antony [1 ]
Mauricio, Cantalapiedra [1 ]
Jyothi, Yelisetti Lakshmi [1 ]
Jayaseelan, Doni Daniel [1 ]
机构
[1] Kingston Univ, Dept Aerosp & Aircraft Engn, Roehampton Vale Campus, London SW15 3DW, England
关键词
Ceramic matrix composites; Failure mechanisms; Tensile behaviour; Fatigue behaviour; High temperature testing; Finite element analysis; THERMOMECHANICAL DAMAGE; FRACTURE-BEHAVIOR; CARBON-FIBER; PERFORMANCE; EVOLUTION; STRESS; CREEP;
D O I
10.1016/j.jeurceramsoc.2021.11.020
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The failure mechanisms of Oxide-Oxide ceramic matrix composites AS-N610 were studied at both room temperature and high temperature using tensile and fatigue tests with and without lateral and laminar notches. The unnotched coupons had an average tensile strength of 423 MPa with elastic modulus of 97 GPa at room temperature showing a perfect elastic behaviour whereas the laminar notched samples shown similar strength of 425 MPa with elastic modulus (98 GPa) revealing pseudo-ductile behaviour. A reduction in tensile strength of the oxide ceramic matrix composites was observed at high temperatures. Thermal shock experiments revealed that the retained strength of the samples quenched from 1100 degrees C deteriorated by similar to 10 % (395 +/- 15 MPa). In all samples, fracture origin was observed on the mid-plane showing a higher degree of fiber pull-out, delamination and pseudo ductile behaviour. Finite element analysis confirmed higher stress concentration on the areas of failures.
引用
收藏
页码:1626 / 1634
页数:9
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