TY - JOUR
T1 - AE analysis of delamination crack propagation in carbon fiber-reinforced polymer materials
AU - Yoon, Sang Jae
AU - Chen, Dingding
AU - Han, Seung Wook
AU - Choi, Nak Sam
AU - Arakawa, Kazuo
N1 - Publisher Copyright:
© 2015, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.
PY - 2015/1
Y1 - 2015/1
N2 - Delamination fracture behavior was investigated using acoustic emission (AE) analysis on carbon fiber-reinforced polymer (CFRP) samples manufactured using vacuum-assisted resin transfer molding (VARTM). CFRP plate was fabricated using unidirectional carbon fiber fabric with a lay-up of six plies [+30/−30]6, and a Teflon film was inserted as a starter crack. Test pieces were sectioned from the inlet and vent of the mold, and packed between two rectangular epoxy plates to load using a universal testing machine. The AE signals were monitored during tensile loading using two sensors. The average tensile load of the inlet specimens was slightly larger than that of the vent specimens; however, the data exhibited significant scattering due to non-uniform resin distribution, and there was no statistically significant different between the strength of the samples sectioned from the inlet or outlet of the mold. Each of the specimens exhibited similar AE characteristics, regardless of whether they were from the inlet or vent of the mold. Four kinds of damage mechanism were observed: micro-cracking, fiber-resin matrix debonding, fiber pull-out, and fiber failure; and three stages of the crack propagation process were identified.
AB - Delamination fracture behavior was investigated using acoustic emission (AE) analysis on carbon fiber-reinforced polymer (CFRP) samples manufactured using vacuum-assisted resin transfer molding (VARTM). CFRP plate was fabricated using unidirectional carbon fiber fabric with a lay-up of six plies [+30/−30]6, and a Teflon film was inserted as a starter crack. Test pieces were sectioned from the inlet and vent of the mold, and packed between two rectangular epoxy plates to load using a universal testing machine. The AE signals were monitored during tensile loading using two sensors. The average tensile load of the inlet specimens was slightly larger than that of the vent specimens; however, the data exhibited significant scattering due to non-uniform resin distribution, and there was no statistically significant different between the strength of the samples sectioned from the inlet or outlet of the mold. Each of the specimens exhibited similar AE characteristics, regardless of whether they were from the inlet or vent of the mold. Four kinds of damage mechanism were observed: micro-cracking, fiber-resin matrix debonding, fiber pull-out, and fiber failure; and three stages of the crack propagation process were identified.
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U2 - 10.1007/s12206-014-1203-2
DO - 10.1007/s12206-014-1203-2
M3 - Article
AN - SCOPUS:84921044570
SN - 1738-494X
VL - 29
SP - 17
EP - 21
JO - Journal of Mechanical Science and Technology
JF - Journal of Mechanical Science and Technology
IS - 1
ER -