TY - JOUR
T1 - Deformation and failure modes of Ti-6Al-4V lattice-walled tubes under uniaxial compression
AU - Li, Xinyuan
AU - Xiao, Lijun
AU - Song, Weidong
N1 - Publisher Copyright:
© 2019
PY - 2019/8
Y1 - 2019/8
N2 - The compressive large deformation response of tubes, comprising walls made of rhombic dodecahedron unit cells, under quasi-static and dynamic loadings is investigated. Six types of tubes with cellular walls that vary with respect to cell density, tube cross-section and cellular tube wall thickness are manufactured by selective laser melting (SLM). The quasi-static and dynamic compression tests are conducted by using a universal testing machine, a drop hammer device and direct-impact Hopkinson pressure bar (DHPB), respectively, to determine the force-deformation responses of the different structures. In addition, the deformation modes and energy absorption capacity of the tubes are identified. The influence of the cross-sectional shape and cellular-walled density gradient on the energy absorption capacity of the various tube configurations is examined. The results indicate that the Ti-6Al-4V lattice-walled tubes with a density gradient exhibit the best absorption efficiency among the tubes studied. The collapse strength of the square cross section tube tested is more significant than that of its cylindrical counterparts.
AB - The compressive large deformation response of tubes, comprising walls made of rhombic dodecahedron unit cells, under quasi-static and dynamic loadings is investigated. Six types of tubes with cellular walls that vary with respect to cell density, tube cross-section and cellular tube wall thickness are manufactured by selective laser melting (SLM). The quasi-static and dynamic compression tests are conducted by using a universal testing machine, a drop hammer device and direct-impact Hopkinson pressure bar (DHPB), respectively, to determine the force-deformation responses of the different structures. In addition, the deformation modes and energy absorption capacity of the tubes are identified. The influence of the cross-sectional shape and cellular-walled density gradient on the energy absorption capacity of the various tube configurations is examined. The results indicate that the Ti-6Al-4V lattice-walled tubes with a density gradient exhibit the best absorption efficiency among the tubes studied. The collapse strength of the square cross section tube tested is more significant than that of its cylindrical counterparts.
KW - Energy absorption
KW - Lattice-walled tubes
KW - Selective laser melting
KW - Ti-6Al-4V
UR - https://www.scopus.com/pages/publications/85063936384
U2 - 10.1016/j.ijimpeng.2019.04.002
DO - 10.1016/j.ijimpeng.2019.04.002
M3 - Article
AN - SCOPUS:85063936384
SN - 0734-743X
VL - 130
SP - 27
EP - 40
JO - International Journal of Impact Engineering
JF - International Journal of Impact Engineering
ER -