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The double cantilever beam test applied to mode I fracture characterization of ...
Morais, J.J.L.; Moura, M.F.S.F.; Pereira, F.A.M.; Xavier, J.; Dourado, N.; Dias, Maria Isabel R.; Azevedo, Jorge Manuel Teixeira dethe primary objective of this work was to analyse the adequacy of the Double Cantilever Beam(DCB) test in determining fracture toughness under pure mode I loading of cortical bone tissue.A new data reduction scheme based on specimen compliance and the crack equivalent concept was used to overcome the difficulties inherent in crack monitoring during its growth. It provides a complete resistance curve, wich is fu...
Processo de monitorização adoptado na reconstrução do pano de Muralha SE do Bal...
Pinto, J. T. Q. S.; Varum, H. S. A.; Guedes, J. P. M.; Morais, J. J. L.Este trabalho de investigação tem como principal objectivo descrever o processo de monitorização adoptado para controlar a estabilidade da muralha do Baluarte do Cavaleiro em Chaves e das construções a ela anexas durante o processo de reconstrução do seu pano SE. Este sistema de construção é formado por: 12 edifícios de habitação/comércio que são na sua maioria do século XVIII e XIX; 3 panos de muralha e respec...
A new data reduction scheme to obtain the mode II fracture properties of Pinus ...
Silva, M. A. L.; Moura, M. F. S. F. de; Morais, A. B. de; Morais, J. J. L.In this work a numerical study of the End Notched Flexure (ENF) specimen was performed in order to obtain the mode II critical strain energy released rate (GIIc) of a Pinus pinaster wood in the RL crack propagation system. The analysis included interface finite elements and a progressive damage model based on indirect use of Fracture Mechanics. The difficulties in monitoring the crack length during an experimen...
Finite element analysis of the ECT test on mode III interlaminar fracture of ca...
Moura, M. F. S. F. de; Silva, M. A. L.; Morais, A. B. de; Morais, J. J. L.In this work a parametric study of the Edge Crack Torsion (ECT) specimen was performed in order to maximize the mode III component (GIII) of the strain energy release rate for carbon-epoxy laminates. A three-dimensional finite element analysis of the ECT test was conducted considering a [90/0/(+45/-45)2/(-45/+45)2/0/90]S lay-up. The main objective was to define an adequate geometry to obtain an almost pure mode...
A new methodology for the characterization of mode II fracture of pinus pinaste...
Moura, M. F. S. F. de; Silva, M. A. L.; Morais, J. J. L.; Morais, A. B. de; Lousada, J. L.In this study, the End Notched Flexure (ENF) fracture test was used to obtain the mode II Rcurve of the Pinus pinaster wood in the RL crack propagation system. The test method was numerically and experimentally analyzed. In the numerical study, three (3D) and twodimensional (2D) finite element analyses were conducted to determine the mode II critical strain energy release rate (GIIc) and the respective R-curve....
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