Title :
Quantitative evaluation of impact damage in composites using acoustic microscopy
Author :
Wey, A.C. ; Kessler, L.W. ; Ho, B.
Author_Institution :
Sonoscan Inc., Bensenville, IL, USA
Abstract :
A C-Scan mode acoustic microscope (C-SAM) and a through-transmission scanning laser acoustic microscopy (SLAM) were used to nondestructively evaluate damage in graphite/epoxy composite laminates which has been subjected to low-velocity impact. The total delamination area was quantitatively measured for all laminated interfaces through the entire thickness. The results from C-SAM and SLAM inspection agree with those from X-radiographs and analytical predictions. Because the measurement is nondestructive, the results can be used to correlate with compression-after-impact strength of the impacted specimens, which is critically important for application of the materials in structural design
Keywords :
acoustic microscopy; area measurement; carbon fibre reinforced composites; compressive strength; delamination; impact strength; laminates; optical microscopy; ultrasonic materials testing; C; C-SAM; C-Scan mode acoustic microscope; SLAM; compression-after-impact strength; delamination area; graphite/epoxy composite laminates; impact damage; laminated interfaces; low-velocity impact; nondestructive evaluation; through-transmission scanning laser acoustic microscopy; Acoustic measurements; Acoustic signal detection; Area measurement; Delamination; Laminates; Laser modes; Microscopy; Simultaneous localization and mapping; Surface acoustic waves; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1991. Proceedings., IEEE 1991
Conference_Location :
Orlando, FL
DOI :
10.1109/ULTSYM.1991.234098
