THERMAL DEFORMATIONS AND STRESSES IN COMPOSITE MATERIALS.

I. M. Daniel*

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

Coefficients of thermal expansion in unidirectional and multidirectional laminates can be calculated using the properties of the constituents and lamination theory. Residual stresses are introduced in multidirectional laminates during curing as a result of thermal anisotropy. These stresses have been investigated analytically and experimentally. It was found that the significant strains recorded during the cooling stage of curing correspond to thermal expansion of the laminate. Residual or restraint strains are computed from measured restrained and unrestrained thermal expansions. Residual stresses are computed using appropriate orthotropic constitutive relations. Results have been obtained from a variety of materials including boron, grahite, Kevlar, S-glass and hybrids with epoxy or polyimide matrices, for a variety of lamination angles.

Original languageEnglish (US)
DOIs
StatePublished - 1980
EventTherm Stresses in Sev Environ, Proc of the Int Conf on Therm Stresses in Mater and Struct in Sev Therm Environ - Blacksburg, VA, USA
Duration: Mar 19 1980Mar 21 1980

Other

OtherTherm Stresses in Sev Environ, Proc of the Int Conf on Therm Stresses in Mater and Struct in Sev Therm Environ
CityBlacksburg, VA, USA
Period3/19/803/21/80

ASJC Scopus subject areas

  • Engineering(all)

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