The effect of applied stress on damage mode of 3D C/C composites under bend-bend fatigue loading

Xiaoling Liao; Hejun Li; Wenfeng Xu; Kezhi Li

doi:10.1007/s11431-007-2025-6

The effect of applied stress on damage mode of 3D C/C composites under bend-bend fatigue loading

Xiaoling Liao, Hejun Li, Wenfeng Xu, Kezhi Li

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The bend-bend fatigue behavior of 3D integral braided carbon/carbon composites (3D C/C) was examined. Fatigue test was conducted under load control at a sinusoidal frequency of 10 Hz to obtain stress-fracture cycles (S-N) relationship. The fatigue limit of the C/C was found to be 203 MPa (92% of the static flexural strength), the lag loops of fatigue load-displacement were transformed from elasticity to anelasticity and the flexibility of specimens were enhanced with increase in applied stress. It is revealed that the interfacial sliding abrasion played an important role in the fatigue failure process, and the extent and speed of sliding abrasion were controlled by the level of applied stress.

Original language	English
Pages (from-to)	97-102
Number of pages	6
Journal	Science in China, Series E: Technological Sciences
Volume	50
Issue number	1
DOIs	https://doi.org/10.1007/s11431-007-2025-6
State	Published - Feb 2007

Keywords

3D C/C composites
Bend-bend fatigue
Damage mode
Lag loop

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10.1007/s11431-007-2025-6

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abstract = "The bend-bend fatigue behavior of 3D integral braided carbon/carbon composites (3D C/C) was examined. Fatigue test was conducted under load control at a sinusoidal frequency of 10 Hz to obtain stress-fracture cycles (S-N) relationship. The fatigue limit of the C/C was found to be 203 MPa (92% of the static flexural strength), the lag loops of fatigue load-displacement were transformed from elasticity to anelasticity and the flexibility of specimens were enhanced with increase in applied stress. It is revealed that the interfacial sliding abrasion played an important role in the fatigue failure process, and the extent and speed of sliding abrasion were controlled by the level of applied stress.",

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AU - Xu, Wenfeng

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Y1 - 2007/2

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AB - The bend-bend fatigue behavior of 3D integral braided carbon/carbon composites (3D C/C) was examined. Fatigue test was conducted under load control at a sinusoidal frequency of 10 Hz to obtain stress-fracture cycles (S-N) relationship. The fatigue limit of the C/C was found to be 203 MPa (92% of the static flexural strength), the lag loops of fatigue load-displacement were transformed from elasticity to anelasticity and the flexibility of specimens were enhanced with increase in applied stress. It is revealed that the interfacial sliding abrasion played an important role in the fatigue failure process, and the extent and speed of sliding abrasion were controlled by the level of applied stress.

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The effect of applied stress on damage mode of 3D C/C composites under bend-bend fatigue loading

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