Nondestructively monitoring fatigue damage in fiber reinforced composites using acoustic microscopy

Author

Wey, A.C. ; Kessler, L.W. ; Reis, H. L M dos

Author_Institution

Sonoscan Inc., Bensenville, IL, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

953

Abstract

Both SLAM, (scanning laser acoustic microscopy) and C-SAM (C-scan mode scanning acoustic microscopy) imaging have been employed to nondestructively monitor the damage development in ceramic composites with LAS (lithium-alumino-silicate) glass matrix reinforced with silicon carbide (NICALON) fibers. To evaluate high-temperature fatigue damage in these ceramic composites 10 MHz SLAM images were produced. The results of reserve strength test obtained during four-point bending static tests where the load was monotonically increased until failure occurred correlated with the prediction made based on SLAM image. SLAM enables one to `see´ the geometrical distribution of all kinds of damage in specimens and helps one understand the collective effect of various damages on the variations in mechanical performance

Keywords

acoustic microscopy; aluminosilicate glasses; fatigue; fibre reinforced composites; lithium compounds; silicon compounds; ultrasonic materials testing; 10 MHz; C-scan mode scanning acoustic microscopy; SiC fiber reinforced Li₂O-Al₂O₃-SiO₂ glass matrix composites; ceramic composites; fatigue damage; four-point bending static tests; geometrical distribution; nondestructive monitoring; reserve strength test; scanning laser acoustic microscopy; Acoustic imaging; Ceramics; Fatigue; Fiber lasers; Glass; Laser modes; Microscopy; Monitoring; Silicon carbide; Simultaneous localization and mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171503

Filename

171503