Akademik Veri Yönetim Sistemi
Transport Means, Kaunas, Litvanya, 2 - 04 Ekim 2024, ss.41-46
In
this study, 100% overlap frontal crash tests are analysed to derive the loading
and unloading stiffnesses of the cars involved in the crash. These stiffnesses
are useful in comparing the aggressivities of cars, making compatibility
analysis and constructing lumped-mass models of cars for accident
reconstruction. The experimental data is obtained from the crash test database
of the National Highway Traffic Safety Administration in the United States.
Three different head-on frontal crash tests are analysed. The derived loading
and unloading stiffnesses of the cars are compared to those from the full-width
rigid barrier (FWRB) tests of these cars. It is observed that the loading and
unloading stiffnesses in the head-on crash tests are lower than those of the
FWRB crash tests since the principal energy absorbing structures (PEAS) of the
two cars do not meet well and the energy absorbing potential of the PEAS are
reduced as typically seen in override/underride impacts. The presented approach
is analytical, provides hand computation of key responses and helps to estimate
these key responses and parameters for moderate crash severities with closing
speeds at around or below 120 km/h. The developed modelling approach can help
to avoid costly crash tests and quantify structural interaction efficiency for
compatibility analysis in 100% overlap crashes.