Torsional response of rectangular composite laminates

C. L. Tsai*, I. M. Daniel, G. Yaniv

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


The torsional response of a composite laminate of rectangular cross-section was analyzed by the Mindlin-Reissner theory. The analysis takes into account separately the shear properties of each layer. A general closed-form relationship was derived between torque and angle of twist in terms of the geometric parameters and shear properties of the laminae. In the case of unidirectional laminates, relations can be expressed involving the three principal shear moduli, G12, G13, and G23. An experimental method was also developed for determining these moduli by measuring surface and edge strains with strain gages. Results for a typical graphite/epoxy composite show the validity of the usual assumption of transverse isotropy.

Original languageEnglish (US)
JournalAmerican Society of Mechanical Engineers (Paper)
StatePublished - 1990
EventProceedings of the Winter Annual Meeting - Dallas, TX, USA
Duration: Nov 25 1990Nov 30 1990

ASJC Scopus subject areas

  • Mechanical Engineering


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