About this Abstract |
Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Presentation Title |
Frequency and Time Domain Analysis of Guided Waves in Plate-Like Structures |
Author(s) |
Fabrizio Ricci, Ernesto Monaco, Vittorio Memmolo |
On-Site Speaker (Planned) |
Fabrizio Ricci |
Abstract Scope |
Finite element (FE) methods are widely used to simulate guided waves in structures where analytical or semi-analytical approaches are difficult to be adopted. The interaction of waves with discontinuities or inhomogeneity such as edges, holes or inner defects can be very precisely modelled through time-domain transient analysis by many FE codes implementing accurate explicit integration algorithm. However, these analyses may require high computational times when applied to large models including defects. Depending on the specific problem, it is necessary to use more the one excitation pulse at difference frequency and in a time-domain solution the analysis needs to be carried out more than one time with a further increase of computational time. Conversely, frequency domain analysis can be carried out on the same class of problems and may offer some advantages in terms of computational time saving. In this paper the two FE approaches are applied on isotropic and orthotropic plate-like structures. Two-dimensional models of isotropic plates without any damage are first used to compare the results obtained in the time (transient explicit) and frequency domain. The plates are modelled with 2D plane strain elements as those models reproduce the equivalent ones in the 3D case for isotropic materials. An inner damage, similar to a delamination, is then considered and the results achieved through the two approaches compared. The same analyses are carried out for composite plates. Finally, the effect of the plate boundaries will be discussed using the two methodologies. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |