As per definition – The force that causes two contiguous
parts of the same body to slide relative to each other in a direction parallel
to their plane of contact is known as shear and the stress which is required to
yield or fracture the material in the plane of material cross-section is known
as shear strength.
As a matter of fact, the shear strength in composites is
based majorly on the design and formulation. Thus, shear properties includes
all – be it the fiber orientation, the type, the sequencing of layers, the
volume of fibers used, the density and type of core materials and hence the
shear strength is vital for both - the design of structural components and the
selection of materials used for aviation safety.
Where fiber mats helps the frangible structures?
Irrespective of the fact that a frangible mechanism is
specifically designed to withstand high wind loads, it stays highly sensitive
to impact loads and tends to be directional in strength which directly means
that it carries a high tension and bending however low shear which is
quintessential otherwise. There comes the role and importance of fiber mat in
What is a fiber mat?
A non-woven fabric manufactured from the fibers and held
together by a chemical binder is known as a fiber mat. It can also be called as
a ply of short or long yarns which are either binded or stitched together.
Key feature set of different types of mats –
Chopped strand mats (CSMs)
- made up
of randomly chopped glass fiber bundles and binding agent on a conveyor belt
in-plane material properties like strength and permeability
- used in
non-structural composite parts due to limited load carrying capability as an
outer surface ply
Continuous filament random mats (CFRMs)
- made up
of continuous filament yarn
higher strength, fiber wash resistance & formability
labor during the layup stage
Benefits of Fiber Mats for frangible structures –
porosity to resin flow
finish during pultrusion process
All specified notions along with suitable tailoring
methods of fiber mats out of available methods like Spray-up of chopped fibers
and binder, Stamping of mats and fabrics in a two-sided mold, Braiding,
Knitting, 3D weaving and Filtration of chopped fiber slurry on a perforated
screen, contribute to its shear strength along with offering help in making the
poles, masts and towers strong along with equipping them with high shear
strength for breakage and distortion upon impact.
Since, SGS Frangible efficiently utilizes the knowledge
and experience of the domain, thus outstands composite manufactures as one of
the most regulated bodies of high quality and efficient manufacturer of
frangible structures with fiber mats for boosting shear strength and
environmental safety thereby leading as an innovative composites company.