Active control of interlaminar stresses in laminated composites by through-thickness thermal gradients

Taehyoun Kim; D. Steadman; Sathya V. Hanagud; S. Atluri

doi:10.1117/12.208876

5 May 1995 Active control of interlaminar stresses in laminated composites by through-thickness thermal gradients

Taehyoun Kim, D. Steadman, Sathya V. Hanagud, S. Atluri

Proceedings Volume 2442, Smart Structures and Materials 1995: Mathematics and Control in Smart Structures; (1995) https://doi.org/10.1117/12.208876
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

In this paper, we propose a method 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 eliminate 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, a feasibility of the thermal control of interlaminar stresses is demonstrated.

Citation Download Citation

Taehyoun Kim, D. Steadman, Sathya V. Hanagud, and S. Atluri "Active control of interlaminar stresses in laminated composites by through-thickness thermal gradients", Proc. SPIE 2442, Smart Structures and Materials 1995: Mathematics and Control in Smart Structures, (5 May 1995); https://doi.org/10.1117/12.208876

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