Which fiber type is described as having a high bending stiffness and being difficult to weave into cloth?

Which fiber type is described as having a high bending stiffness and being difficult to weave into cloth?

• A. Carbon fibers
• B. Kevlar
• C. Boron Fibers
• D. Glass fibers

Answer: (C)

Bending stiffness reflects how easily a fiber can bend; fabrics require fibers to flex as they are woven and interlaced. Boron fibers are extremely stiff and brittle, so they resist bending to the point where they tend to crack rather than flex around loom guides. This makes weaving boron into cloth impractical, so they’re used in unidirectional preforms or as part of nonwoven/forming applications rather than as woven fabric. Other fibers like carbon, glass, and Kevlar are much more workable in fabric form, offering high stiffness without the same brittleness that prevents weaving.

Bending stiffness reflects how easily a fiber can bend; fabrics require fibers to flex as they are woven and interlaced. Boron fibers are extremely stiff and brittle, so they resist bending to the point where they tend to crack rather than flex around loom guides. This makes weaving boron into cloth impractical, so they’re used in unidirectional preforms or as part of nonwoven/forming applications rather than as woven fabric. Other fibers like carbon, glass, and Kevlar are much more workable in fabric form, offering high stiffness without the same brittleness that prevents weaving.