Issue |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 43 - 48 | |
DOI | https://doi.org/10.1051/jp4:2006134008 | |
Published online | 26 July 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 43-48
DOI: 10.1051/jp4:2006134008
High rate constitutive modeling of aluminium alloy tube
C.P. Salisbury1, M.J. Worswick1 and R. Mayer21 University of Waterloo, Mechanical Engineering Waterloo, Ontario, Canada N2L 3G1
2 General Motors Technical Center, Vehicle Analysis & Dynamics Lab., Warren, Michigan, USA
Published online: 26 July 2006
Abstract
As the need for fuel efficient automobiles increases, car
designers are investigating light-weight materials for automotive bodies
that will reduce the overall automobile weight. Aluminium alloy tube is a
desirable material to use in automotive bodies due to its light weight.
However, aluminium suffers from lower formability than steel and its energy
absorption ability in a crash event after a forming operation is largely
unknown. As part of a larger study on the relationship between
crashworthiness and forming processes, constitutive models for 3mm AA5754
aluminium tube were developed. A nominal strain rate of 100/s is often used
to characterize overall automobile crash events, whereas strain rates on the
order of 1000/s can occur locally. Therefore, tests were performed at
quasi-static rates using an Instron test fixture and at strain rates of
500/s to 1500/s using a tensile split Hopkinson bar. High rate testing was
then conducted at rates of 500/s, 1000/s and 1500/s at 21C, 150
C
and 300
C. The generated data was then used to determine the
constitutive parameters for the Johnson-Cook and Zerilli-Armstrong material
models.
© EDP Sciences 2006