Determination of in-plane and out-of-plane shear moduli of composite materials

C. L. Tsai; I. M. Daniel

doi:10.1007/BF02322825

Determination of in-plane and out-of-plane shear moduli of composite materials

C. L. Tsai^*, I. M. Daniel

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

A general closed-form relationship was derived between torque and angle of twist for a prismatic composite specimen in terms of the geometric parameters and shear properties of the laminae. In the case of unidirectional laminates, relations are expressed in terms of three principal shear moduli, G₁₂, G₂₃ and G₁₃. An experimental method was developed for determining these moduli by measuring surface and edge strains with strain gages. Unidirectional coupons of graphite/epoxy and silicon carbide/glass ceramic were tested in torsion and the three shear moduli were determined in each case.

Original language	English (US)
Pages (from-to)	295-299
Number of pages	5
Journal	Experimental Mechanics
Volume	30
Issue number	3
DOIs	https://doi.org/10.1007/BF02322825
State	Published - Sep 1990

ASJC Scopus subject areas

Aerospace Engineering
Mechanics of Materials
Mechanical Engineering

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10.1007/BF02322825

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AB - A general closed-form relationship was derived between torque and angle of twist for a prismatic composite specimen in terms of the geometric parameters and shear properties of the laminae. In the case of unidirectional laminates, relations are expressed in terms of three principal shear moduli, G12, G23 and G13. An experimental method was developed for determining these moduli by measuring surface and edge strains with strain gages. Unidirectional coupons of graphite/epoxy and silicon carbide/glass ceramic were tested in torsion and the three shear moduli were determined in each case.

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Determination of in-plane and out-of-plane shear moduli of composite materials

Abstract

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