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Support structures are commonly used in machines, devices and vehicles.
In the simplest case, a beam is used as a support, or a more complicated, but at the
same time light truss. However, sometimes the bracket needs to be able to adjust the
force (pressure) or position. In this case, it is a mechanism with an internal drive,
often performed hydraulically. This type of bracket, the damage of which was the
cause of the road accident, was analyzed in this article. The research began with an
analysis of the structure. Due to the limited installation space and assembly errors,
it was characterized by different strength of individual nodes. In addition, materials
with extremely different strengths were used to manufacture the supporting
elements that work together. Subsequently, simulations were carried out using the
finite element method (FEM). The support structure model contained a different
degree of simplification in comparison with the real object. As a result of the
simulation, it was shown that some parts of the support practically do not participate
in the transfer of the operating load. The lack of automatic pressure regulation in the
hydraulic cylinder can cause damage to the support system at the very beginning,
when securing the load. The occurrence of dynamic forces during cargo transport is
associated with plastic deformation of less durable parts of the structure. Small
changes in the assembly method and the use of additional components can
significantly increase the service life of the tested bracket system.
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