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Halpin-Tsai Equations
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Definition: These equations are useful for the prediction of the ply properties of composite materials. They are as follows:

E11 = EfVf + Em (1 — Vf)

ν12 = νfVf + νm (1 — Vf)

Mf/Mm = (1 + ζηVf)/(1 — ηVf)

in which M is the composite modulus E22, G12 or ν23; Mf the corresponding fiber modulus Ef, Gf or νf; and Mm the corresponding matrix modulus Em, Gm, or νm. ζ depends on various characteristics of the reinforcing phase such as the shape and aspect ratio of the fibers, packing geometry and regularity and also on loading conditions. It is necessary to determine ζ empirically by fitting the curves to experimental results.
Definition Copyright ©1989 CRC Press LLC. All rights reserved.

<Back to Last Page>     <Glossary Home>     <Random Word>
<Preface>     <Suggest a Word>     <CRC Press Catalog>
<Abbreviations/Acronyms>     <Symbols>
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

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