Abstract:
This dissertation presents an investigation in the energy
absorbing capacity of thin-walled metal inverbucktubes
loaded in axial compression. It also presents the
inversion-buckling(curling-buckling) behaviour achieved
in both, quasi-static and dynamic loading conditions.
In addition, for the first time, the experimental results
of the pressure or normal stress distribution between the
inside surface of the inverbucktube and die fillet radius
interface are stipulated. These were very successful,
using the pressure transducer method.
Furthermore, a mathematical model has been developed,
based on theory of plasticity and making use of energy
method. This predicts the amount of energy absorbed in the
assumed seperate collapse processes. Results yielded from
the theory, showed good agreement with the experimental
results which had geometry factor within feasibility
boundaries of inverbuckling collapse (6.5 ( 5/2t,, ( 22.5).
The successful prediction of energy absorbed,
inverbuckling load and pressure distribution, not only
proves the validity of the model, but also confirms the
quality of the modelling approach proposed in this
dissertation. Using this mathematical model,
inverbucktubes could be designed, developed and applied.
