Fatigue behavior and damage analysis of PIP C/SiC composite
Veröffentlichungsdatum
2022-10-01
Zusammenfassung
In this work, we study the fatigue behavior of a C/SiC composite produced by several cycles of polymer infil- tration and pyrolysis (PIP). Fatigue tests were performed with maximum stresses corresponding to 60–90% of the tensile strength of the composite. During the fatigue tests, acoustic emission (AE) monitoring was performed and the measured AE energy was utilized to quantify the damage and distinguish possible damage mechanisms. Most of the fatigue damage in the form of matrix cracking, interface damage and fiber breakage occurs in the first cycle. As loading cycles proceeded, damage in form of matrix crack re-opening and interfacial friction constantly accumulates. Nevertheless, all samples survived the run-out of 1,000,000 cycles. After the fatigue tests, an in- crease of the tensile strength is observed. This phenomenon is associated with the relief of process-induced in- ternal thermal stresses and the weakening of the fiber-matrix interface. In general, the studied material shows very high relative fatigue limit of 90% of its tensile strength
Schlagwörter
Ceramic matrix composites
;
Fatigue
;
Damage analysis
;
Acoustics emission
;
Residual strength
Verlag
Elsevier Science
Institution
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Band
42
Heft
13
Startseite
5391
Endseite
5398
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Sprache
Englisch
Dateien![Vorschaubild]()
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Name
Almeida et al_Fatigue behavior and damage analysis_2022_accepted-version.pdf
Size
2.6 MB
Format
Adobe PDF
Checksum
(MD5):6dd2931981560b42c1b7f24fbf91d8b1