TY - GEN
T1 - Damage behavior of foam core sandwich composites subjected to quasi-static indentation testing
AU - Yan, Li
AU - An, Xuefeng
AU - Cai, Jianli
AU - Yi, Xiaosu
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - Damage behavior of foam core sandwich composites subjected to quasi-static indentation testing was investigated detailedly. Force-displacement curves and the cross-sections of damaged sandwich panels were analyzed. Effects of core thickness, face-sheet thickness and toughness of face-sheet materials were discussed by comparison with different specimens subjected to quasi-static indentation testing. Results showed that damage behavior of sandwich composites had identical feature. Collapse of foam core initially appeared, and then foam core generated crack. Delamination and fiber breakage of upper face-sheet occurred. Finally, the foam core and the face-sheet were disengaged. For the specimens with thick foam cores, the foam crack extended in longitudinal direction was caused. However, for the specimens with thin foam cores, the foam cracked in transverse direction. After face-sheets were toughened with PAEK, the damage resistance and the maximum force of the sandwich panels increased. Also, the shear angle of foam crack changed to be lager. Compared with the penetrated damage behavior of sandwich panels with thin face-sheets, the upper face-sheets of the former the specimens with thick face-sheets bulged partially and could not be penetrated.
AB - Damage behavior of foam core sandwich composites subjected to quasi-static indentation testing was investigated detailedly. Force-displacement curves and the cross-sections of damaged sandwich panels were analyzed. Effects of core thickness, face-sheet thickness and toughness of face-sheet materials were discussed by comparison with different specimens subjected to quasi-static indentation testing. Results showed that damage behavior of sandwich composites had identical feature. Collapse of foam core initially appeared, and then foam core generated crack. Delamination and fiber breakage of upper face-sheet occurred. Finally, the foam core and the face-sheet were disengaged. For the specimens with thick foam cores, the foam crack extended in longitudinal direction was caused. However, for the specimens with thin foam cores, the foam cracked in transverse direction. After face-sheets were toughened with PAEK, the damage resistance and the maximum force of the sandwich panels increased. Also, the shear angle of foam crack changed to be lager. Compared with the penetrated damage behavior of sandwich panels with thin face-sheets, the upper face-sheets of the former the specimens with thick face-sheets bulged partially and could not be penetrated.
KW - Damage behavior
KW - Foam core sandwich composites
KW - Force-displacement curves
KW - Quasi-static indentation testing
UR - http://www.scopus.com/inward/record.url?scp=84869839204&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.182-183.57
DO - 10.4028/www.scientific.net/AMM.182-183.57
M3 - Conference contribution
AN - SCOPUS:84869839204
SN - 9783037854266
T3 - Applied Mechanics and Materials
SP - 57
EP - 64
BT - Applied Mechanics and Mechatronics Automation
T2 - 2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012
Y2 - 7 September 2012 through 9 September 2012
ER -