On the feasibility of using thermal gradients for active control of interlaminar stresses in laminated composites

T. Kim, D. Steadman, S. V. Hanagud, S. N. Atluri

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In this paper, a method is proposed to actively control interlaminar stresses near the free edges of laminated composites by through-thickness thermal gradients. Theoretical solutions are given for optimal steady-state through-thickness temperature distributions under uniaxial loading that are required to elmininate or reduce the interlaminar stresses below a prescribed level. The optimal solutions are obtained by minimizing appropriate performance indices that are functions of the far-field properties, with respect to the through-thickness temperature differences. In the second part, an experimental investigation is conducted on a glass/epoxy cross-ply laminate with embedded piezoelectric sensors and a thermal heater. Through the experiment, the feasiblity of the thermal control of interlaminar stresses is demonstrated.

Original languageEnglish
Pages (from-to)1556-1573
Number of pages18
JournalJournal of Composite Materials
Volume31
Issue number16
DOIs
StatePublished - 1997

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