STP1080: Plasticity Analysis of Fibrous Composite Laminates Under Thermomechanical Loads

    Bahei-El-Din, YA
    Associate professor, Cairo UniversityRensselear Polytechnic Institute, GizaTroy, NY

    Pages: 20    Published: Jan 1990


    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.


    composite materials, laminates, metal matrix, plasticity, mechanical loads, thermal changes, thermal properties, mechanical properties

    Paper ID: STP25389S

    Committee/Subcommittee: D30.07

    DOI: 10.1520/STP25389S

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