TY - CONF A1 - Saputra, A. A. A1 - Birk, C. A1 - Song, C. A1 - Gravenkamp, Hauke ED - Samali, ED - Attard, ED - Song, T1 - Numerical modelling of lamb waves in cracked plates using the scaled boundary finite element method T2 - ACMSM 22 - Australasian conference on the mechanics of structures and materials - From materials to structures: advancement through innovation T2 - ACMSM 22 - Australasian conference on the mechanics of structures and materials CY - Sydney, Australia DA - 2012-12-11 KW - Lamb waves KW - Scaled boundary finite element method KW - Crack detection KW - Continued fractions PY - 2013 SN - 978-0-415-63318-5 SP - 927 EP - 932 PB - Taylor & Francis AN - OPUS4-27751 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gravenkamp, Hauke A1 - Saputra, A. A. A1 - Song, C. A1 - Prager, Jens ED - Linde, B. B. J. ED - Paczkowski, J. ED - Ponikwicki, N. T1 - Detection of defects in thin-walled structures by means of lamb waves T2 - International congress on ultrasonics N2 - In this paper the Scaled Boundary Finite Element Method (SBFEM) is applied for the simulation of Lamb waves in cracked plates. This method is highly advantageous to study the interaction of different Lamb wave modes with cracks as the crack is not discretized and no refinement is required around the crack tip. Numerical examples are presented for the reflection of the fundamental symmetric and antisymmetric modes from cracks of different depth. The spatial Fourier transformation is employed to calculate the amplitudes of reflected Lamb wave modes. The results reveal possibilities to obtain details of the crack geometry in non-destructive testing and structural health monitoring applications. T2 - International congress on ultrasonics CY - Gdansk, Poland DA - 05.09.2011 KW - Lamb waves KW - Scaled boundary finite element method KW - Simulation KW - Crack detection PY - 2012 SN - 978-0-7354-1019-0 DO - https://doi.org/10.1063/1.3703223 SN - 0094-243X N1 - Serientitel: AIP conference proceedings – Series title: AIP conference proceedings IS - 1433 SP - 443 EP - 446 PB - American Institute of Physics CY - Melville, NY AN - OPUS4-26203 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gravenkamp, Hauke A1 - Prager, Jens A1 - Saputra, A. A. A1 - Song, C. T1 - The simulation of Lamb waves in a cracked plate using the scaled boundary finite element method JF - The journal of the Acoustical Society of America : JASA N2 - The scaled boundary finite element method is applied to the simulation of Lamb waves for ultrasonic testing applications. With this method, the general elastodynamic problem is solved, while only the boundary of the domain under consideration has to be discretized. The reflection of the fundamental Lamb wave modes from cracks of different geometry in a steel plate is modeled. A test problem is compared with commercial finite element software, showing the efficiency and convergence of the scaled boundary finite element method. A special formulation of this method is utilized to calculate dispersion relations for plate structures. For the discretization of the boundary, higher-order elements are employed to improve the efficiency of the simulations. The simplicity of mesh generation of a cracked plate for a scaled boundary finite element analysis is illustrated. KW - Lamb waves KW - Scaled boundary finite element method KW - Dispersion KW - Structural dynamics KW - Cracks PY - 2012 DO - https://doi.org/10.1121/1.4740478 SN - 0001-4966 SN - 1520-8524 VL - 132 IS - 3 SP - 1358 EP - 1367 PB - AIP CY - Melville, NY, USA AN - OPUS4-27115 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -