Silva, M. A. G., C. Cismaşiu, and C. G. Chiorean. "
Low velocity impact on laminates reinforced with {P}olyethylene and {A}ramidic fibres."
Computational Methods in Engineering and Science. Proceedings of the 9th International Conference EPMESC IX. Eds. V. P. Iu, L. N. Lamas, Y. - P. Li, and K. M. Mok. Macao, China: A.A.Balkema Publishers, 2003. 843-849.
AbstractThe present study reports low velocity impact tests on composite laminate plates reinforced either with Kevlar 29 or Dyneema. The tests are produced using a Rosand Precision Impact tester. The experimental results obtained for Kevlar 29 are simulated numerically. The deflection history and the peak of the impact force are compared with experimental data and used to calibrate the numerical model.
Rebelo, Hugo Miguel Bento, Corneliu Cismasiu, Válter José Guia da Lúcio, Manuel Tomás Marques Souto do Gonçalves, Gabriel Jesus de Gomes, and José Pedro Fernandes Basto. "
Numerical Simulation of Blast Effects on Fibre Grout Strengthened RC Panels."
International Conference on Structural and Mechanical Engineering for Security and Prevention 2017. Prague, Czech Republic 2017.
Rebelo, Hugo Bento, Corneliu Cismaşiu, Válter J. G. Lúcio, Manuel T. M. S. Gonçalves, Gabriel J. Gomes, and José P. F. Basto. "
Numerical Simulation of Blast Effects on Fibre Grout Strengthened RC Panels."
Structural and Mechanical Engineering for Security and Prevention. Vol. 755. Key Engineering Materials, 755. Trans Tech Publications, 2017. 18-30.
AbstractThe present paper aims to examine the potential of the Applied Element Method (AEM) in simulating the blast effects in RC panels. The numerical estimates are compared with the results obtained in an experimental campaign designed to investigate the effectiveness of fibre grout for strengthening full scale RC panels by comparing the effects that a similar blast load produces in a reference and the strengthened panel. First, a numerical model of the reference specimen was created in the software Extreme Loading for Structures and calibrated to match the experimental results. With no further calibration, the fibre reinforced grout strengthening was added and the resulting numerical model subjected to the same blast load. The experimental blast effects on both reference and strengthened panels, despite the lack of high speed measurement equipment (pressure, strains and displacements sensors), compare well with the numerical estimates in terms of residual and maximum displacements, showing that, once calibrated, the AEM numerical models can be successfully used to simulate blast effects in RC panels.
Santos, F. P., and C. Cismasiu. "
Shape memory alloys in structural vibration control."
EVACES'07 - Experimental Vibration Analysis for Civil Engineering Structures. FEUP, Porto, Portugal 2007.
AbstractThe unique superelastic behaviour exhibited by shape memory alloys (SMAs) allows the material to recover after withstanding large deformations. This recovery takes place without any residual strains, while dissipating a considerable amount of energy. This property makes the SMAs particularly suitable for applications in vibration control devices. Numerical models, calibrated with experimental laboratory tests, are used to investigate the dynamic response of vibration control devices. These devices are built up of austenitic superelastic wires. The energy dissipation and re-centring capabilities, important features of these devices, are clearly illustrated by the numerical tests. One of these devices is tested as a seismic passive vibration control system in a simplified numerical model of a railway viaduct.
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