Abstract
New complex materials constitute new challenges for the well established nondestructive ultrasonic testing (UT) methods. In aeronautic industry Carbon Fiber Reinforced Plastics (CFRP) with a high level of inner inhomogeneity are used. New construction methods of these materials lead to manufacturing problems that cannot be monitored satisfactorily yet. Therefore a consolidated knowledge of the materials and of the interactions during testing is necessary. Modeling is a promising tool to improve the understanding of physical backgrounds and thus, to reduce testing costs. In this work UT of three-dimensional models of woven fabrics on microstructure level is simulated for the first time. Therefore, model generation and simulation performance are performed separately. The inner geometry of laminates made of woven fabrics is modeled using the software module WiseTex, a textile pre-processor developed by the Catholic University of Leuven, Belgium. In these models the wave propagation is numerically calculated using the Elastodynamic Finite Integration Technique (EFIT) implemented with C++. The calculations are performed for fully orthotropic and heterogeneous media. The resolution of the investigated inner structure is in the range of micrometers depending on the frequency range. The possibility of introducing defects in the structure is shown. The influence of the interfaces between carbon fiber rovings, matrix and defects on the wave propagation is investigated. Finally comparisons of the results with experimental data are presented.
Originalsprache | Englisch |
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Seiten (von - bis) | 1077-1082 |
Seitenumfang | 6 |
Fachzeitschrift | AIP Conference Proceedings |
Jahrgang | 1096 |
DOIs | |
Publikationsstatus | Veröffentlicht - 2009 |
Veranstaltung | Review of Progress in Quantitative Nondestructive Evaluation - Chicago, IL, USA/Vereinigte Staaten Dauer: 20 Juli 2008 → 25 Juli 2008 |