SYMPOSIA PAPER Published: 01 January 1990

Plasticity Analysis of Fibrous Composite Laminates Under Thermomechanical Loads


Elastic-plastic behavior of fibrous composite laminates is analyzed for coupled in-plane mechanical loads and uniform thermal changes. Constitutive equations of the individual fibrous layers are derived from a vanishing fiber diameter model that represents the essential axial constraint between the phases. This permits derivation of closed form equations for the overall yield condition, stress concentration factors, and instantaneous compliance. Thermoelastic properties of the phases and yield stress of the matrix phase are functions of temperature. The effect of the model assumptions on the predicted behavior of composite laminates is examined by comparing the calculated response under cyclic thermal changes to available theoretical results and experimental measurements.

Author Information

Bahei-El-Din, YA
Rensselear Polytechnic Institute, Troy, NY, Egypt
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Developed by Committee: D30
Pages: 20–39
DOI: 10.1520/STP25389S
ISBN-EB: 978-0-8031-5138-3
ISBN-13: 978-0-8031-1385-5