TY - JOUR
T1 - Mechanical behavior of C/SiC composites under hypervelocity impact at different temperatures
T2 - Micro-structures, damage and mechanisms
AU - Li, Tao
AU - Mo, Jianjun
AU - Yu, Xia
AU - Suo, Tao
AU - Li, Yulong
N1 - Publisher Copyright:
© 2016 Published by Elsevier Ltd.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - To understand the mechanical behavior of C/SiC composites under hypervelocity impact at different temperatures, impact tests are conducted using a modified electrical gun, and corresponding numerical simulations are implemented. In addition, the decrease of residual strength induced by damage is also measured after impact tests. Tensile and shear failures occur in different regions of fracture, and the damage zone around the fracture is very confined (<5 mm). Besides, the distribution of debris clouds shows "three zones" mode, forming with different mechanisms, and demonstrates that there is a high-energy powdering column in the centre zone. As for the diameter of penetration hole, it increases with impact velocity. At low temperature, with the change of mechanical properties and forming of new micro-cracks, the fracture is smoother, while the diameters of damage zone and penetration hole are smaller. Furthermore, the damage induced by hypervelocity impact significantly reduces the strength of C/SiC composites.
AB - To understand the mechanical behavior of C/SiC composites under hypervelocity impact at different temperatures, impact tests are conducted using a modified electrical gun, and corresponding numerical simulations are implemented. In addition, the decrease of residual strength induced by damage is also measured after impact tests. Tensile and shear failures occur in different regions of fracture, and the damage zone around the fracture is very confined (<5 mm). Besides, the distribution of debris clouds shows "three zones" mode, forming with different mechanisms, and demonstrates that there is a high-energy powdering column in the centre zone. As for the diameter of penetration hole, it increases with impact velocity. At low temperature, with the change of mechanical properties and forming of new micro-cracks, the fracture is smoother, while the diameters of damage zone and penetration hole are smaller. Furthermore, the damage induced by hypervelocity impact significantly reduces the strength of C/SiC composites.
KW - C/SiC composites
KW - Damage
KW - Hypervelocity impact
KW - Mechanisms
KW - Micro-structures
UR - http://www.scopus.com/inward/record.url?scp=84971222504&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2016.05.015
DO - 10.1016/j.compositesa.2016.05.015
M3 - 文章
AN - SCOPUS:84971222504
SN - 1359-835X
VL - 88
SP - 19
EP - 26
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -