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  4. Mechanical behavior of LSI based C/C-SiC composites subjected to flexural loadings
 
Zitierlink DOI
10.26092/elib/2604
Verlagslink DOI
10.1016/j.compositesa.2017.01.024

Mechanical behavior of LSI based C/C-SiC composites subjected to flexural loadings

Veröffentlichungsdatum
2017-02-14
Autoren
Li, Yang  
Xiao, Peng  
Shi, Yuan  
Saint Martin Almeida, Renato  
Zhou, Wei  
Li, Zhuan  
Luo, Heng  
Reichert, Florian  
Langhof, Nico  
Krenkel, Walter  
Zusammenfassung
In general, flexural loads result in more complicated and uneven stress distributions in specimens, compared to axial loading. This study reports the influence of flexural fatigue loads including different stress levels and cycles on the mechanical behavior of a 3D C/C-SiC composite. The cyclic tensile loads in the lower part of the specimens result in strength enhancement after short fatigue duration with the expense of decreased flexural modulus due to the fatigue damage such as cracking and interfacial degradation. Whereas the upper part of the post-fatigue specimens, which is almost free of fatigue damage under compressive stress, can still properly deflect the cracks and result in quasi-plastic failures like virgin specimens. Most notably, specimens will suffer strength decline rapidly, after 50,000 cycles with maximum stress of 95 MPa for instance, because of considerable stress concentrations and wear of fibers at 90 fiber bundles in the lower part.
Schlagwörter
C/C-SiC

; 

Flexural fatigue

; 

Interfacial degradation

; 

3D reinforcement
Verlag
Elsevier {BV}
Institution
Universität Bremen  
Fachbereich
Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)  
Institute
Fachgebiet 17: Keramische Werkstoffe und Bauteile  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Composites Part A: Applied Science and Manufacturing  
Band
95
Startseite
315
Endseite
324
Seitenzahl
10
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

LI - Mechanical behavior of LSI.pdf

Size

3.45 MB

Format

Adobe PDF

Checksum

(MD5):100467ed90a7c84fda28abefcabcfa87

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