Fatigue behavior and residual strength evolution of 2.5D C/C-SiC composites
Veröffentlichungsdatum
2016-08-20
Zusammenfassung
The residual tensile strength (RTS) evolution of a chemical vapor infiltration and liquid silicon infiltration based 2.5 dimensional reinforced C/C-SiC (2.5D C/C-SiC) composites after fatigue loadings has been investigated. The results show that the fatigue limit (106 cycles) of the 2.5D C/C-SiC composites reaches 58.2 MPa, which corresponds to 75% of the virgin static tensile strength (77.7 MPa). Moreover, an ultimate strength enhancement is observed after fatigue loading. The most pronounced RTS increases to 92.5 MPa when specimens are subjected to fatigue stress of 69.3 MPa for 105 cycles. The microstructural analysis indicates that RTS after cyclic loading is affected by the formation and propagation of cracks and interfacial degradation. Furthermore, a model proposed in this work can well evaluate the RTS of the composites in relation to the number of the applied fatigue cycles.
Schlagwörter
C/C-SiC
;
Tensile fatigue
;
Mechanical evolution
;
Residual strength
Verlag
Elsevier {BV}
Institution
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Band
36
Heft
16
Startseite
3977
Endseite
3985
Seitenzahl
9
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Sprache
Englisch
Dateien![Vorschaubild]()
Lade...
Name
LI - Fatigue behavior and residual strength evolution of 2_5D.pdf
Size
3.38 MB
Format
Adobe PDF
Checksum
(MD5):d39a8939a42e72c24315a54c4cf2eb3c