7/25/2019 shoe rack
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DISCUSSION
In order to produce a new product without facing big problem in
designing and fabrication
process, we have to construct an early planning. A part of the
planning is the method to
implement before, during and after the process.
There is a shear force and a bending moment acting along the
length of a beam experiencing a
transverse load. This normal stress often dominates the design
criteria for beam strength, but as
beams become short and thick, a transverse shear stress becomes
dominate. Bending can induce
both a normal stress and a transverse shear stress. The
magnitude of the shear stress becomes
important when designing beams in bending that are thick or
short beams can and will fail in
shear while bending. To calculate the transverse shear stress we
use the applied shear force
which can be obtained from a shear!moment diagram", the first
moment of area and thickness ofthe region of interest, and the
second moment of area of the entire structure. The difficulty
with
these problems typically emerges while deciding what the region
of interestis in a particular
problem, and properly calculating Qfor this region.
The results of the numerical analysis for the combined stresses
of #oints revealed that the average
compression stress values at the outer edge of the #oints were
significantly higher than those of
tension stress at the inner edge of the #oints. $ailures
occurred at the inner edges of the #oints
where was under tension stress. The high values of the
compression stresses at the outer edge ofthe #oints caused a
destructive non!elastic deformation in the vertical and hori%ontal
elements of
the #oints so that these elements were pressed together at the
outer corner of the #oints. &owever,
as these two parts of #oints almost always support each other
under heavily load' they were
sub#ected for only some compressions deformations. The average
values of combined stresses for
the #oints with beech members were higher than those of #oints
with members made of other
wood species. $urthermore, as descripted, the bending strength
of the #oints greater than that of
the #oints with beech wood spline, as a result, the combined
stresses that occurred at the #oints
with plywood spline were also greater than those of #oints with
beech wood splines
