Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171503
