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Study of the unfolding failure of curved composite laminates.

Opened Access Study of the unfolding failure of curved composite laminates.
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Autor: González Cantero, Juan Manuel
Director: Graciani Díaz, Enrique
París Carballo, Federico
Departamento: Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras
Fecha: 2017-10-30
Tipo de documento: Tesis Doctoral
Resumen: The use of composite materials in structural applications has been considerably increased in the last years. This increment has introduced the use of composite laminates in complex components including highly curved zones. Highly curved laminates are prone to unfolding failure, a delamination caused by a bending moment which tries to atten the curvature. Unfolding failure is classically associated to the Interlaminar Normal Stress (INS), which is characterized by the InterLaminar Tensile Strength (ILTS). The ILTS is typically obtained by a four-point bending test applied to an L-shaped specimen with all the plies oriented at 0o. If this test procedure is applied to composite laminates with di erently oriented plies an apparent ILTS is obtained. The apparent ILTS exhibits a thicknessdependence which has not been physically explained yet. INS may be obtained by using FEM. Notwithstanding, analytical models are desirable for obtaining lower modelling and calculation times. Now...
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Cita: González Cantero, J.M. (2017). Study of the unfolding failure of curved composite laminates.. (Tesis Doctoral Inédita). Universidad de Sevilla, Sevilla.
Tamaño: 9.639Mb
Formato: PDF


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