Proyecto de investigación
Generación de un criterio de fallo para la predicción del fallo entre fibras en materiales compuestos en base a los mecanismos de daño del material
Responsable: Federico París Carballo
Tipo de Proyecto/Ayuda: Plan Nacional del 2009
Referencia: MAT2009-14022
Fecha de Inicio: 01-01-2010
Fecha de Finalización: 31-12-2013
Empresa/Organismo financiador/es:
- Ministerio de Ciencia e Innovación
Equipo:
- Investigadores:
- Otros Investigadores:
Resumen del proyecto:
The failure of fibrous composites dominated by the fibres is reasonable well predicted, different proposals based on different principles leading to similar predictions.
This does not happen with inter-fibre or matrix failure. There are many approaches used to generate failure criteria, leading to very differents predictions. The common point of the majority of these criteria is that they are extensions or medifications of criteria formerly used for isotropic (metallic) materials, considering that the non-homogeneius character of the material is not important in the generation of a failure criterion.
During a decade, the Group of Elasticity and Strength of Materials of the Engineering School of Seville has been working on the understanding of the mechanisms of damage associated to the inter-fibre failure in orden to get more knowledge on this type of failure, to make feasible to have a physically based failure criterion. The non-homogeneous character of the material is considered the key factor to understand the mechanisms of damage.
This research has explained the mechanisms of failure under tension, compression or combined tension-comprenssion normal to the direction of the fibres. One of the main findings of this research carried out is the role, not considered in former existing criteria, that the normal stress parallel to the plane of failure has on the final failure. This fact has been numerically explained and experimentally proved.
The main objective of this Project, based on this accumulated knowledge, is to generate a physically based criterion for the prediction of inter-fibre failure in fibrous composites.
The methodology will be the generation of criteria at macro level based on the knowledge accumulated at micro level, and its comparison with the results obtained from biaxial tests conceived and carried out in this Project.
