5. Conclusions
Based on the results presented above, it is demonstrated that the
proposed analytical model can be used to effectively predict the
leveling process of the H-beam. The following conclusions can be
drawn:
(1) The relationship between the roller reduction and the curvature
is built for the ‘H’ position and ‘I’ position leveling process.Meanwhile,
the computational procedure is given in detail to describe
how the bending stresses change step by step using the linear
strain hardening material model.
(2) The comparison between experimental data and present
analysis verified the proposed model for efficient and robust
simulation of the leveling process with the consideration
of key parameters such as trajectory and residual stress
distribution.
(3) The defective H-beam with flatness imperfections tends to be
flattened and the uniformity of internal residual stresses can
be reduced effectively after the ‘H’ position and ‘I’ position
leveling process. The presented trajectory data also match
well with the FEM simulation result.
(4) It is confirmed that the bending stresses distribute in ‘X’ shape
because of the accumulation effect of the continuous alternating
bending and reverse bending process.
(5) It is recognized that other types of defects such as combination
of strong and weak axis bending, twisty bending should
be studied in the future for practical application in the design
and implementation of H-beam leveling.