An epoxy is randomly reinforced with Kevlar fibers with 0.04 mm diameter,15 mm length, 3.5 GPa ultimate tensile strength, and 50 MPa shear strength.Does this fiber length fully strengthen the composite? What is the minimumfiber length that would make the composite continuously reinforced?

An epoxy is randomly reinforced with Kevlar fibers with 0.04 mm diameter,15 mm length, 3.5 GPa ultimate tensile strength, and 50 MPa shear strength.Does this fiber length fully strengthen the composite? What is the minimumfiber length that would make the composite continuously reinforced?

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.9P

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Concept explainers

Glass

Glass is a brittle, supercooled, non-crystalline liquid. It is a clear amorphous solid, meaning, its atomic arrangements lack a definite pattern and long orderly arrangement. Glass can be thought of as a frozen liquid whose molecular flowability is retarded to much sower rate. Studies and science related to glass is an emerging field, with this, a new branch of materials science and engineering has developed known as, "glass engineering". Glass engineering focuses on the design and development of ceramics, glass, and composites. Engineers in this field test and work on new materials, that can be used in place of the traditional glass in terms of strength and durability. A glass engineer also engages himself in developing new equipment and manufacturing techniques, which can lead to the production of glass with enhanced properties.

Question

An epoxy is randomly reinforced with Kevlar fibers with 0.04 mm diameter,
15 mm length, 3.5 GPa ultimate tensile strength, and 50 MPa shear strength.
Does this fiber length fully strengthen the composite? What is the minimum
fiber length that would make the composite continuously reinforced?

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