Advanced Search
Displaying 911-920 on page 92 of 914. Per Page  

Articles / Online

  • Global/Local Fracture Mechanics Analyses of advanced Aerospace Structures
  • Abstract In this paper a Hierarchical approach for the analysis of advanced aerospace structures is presented. The proposed Global/Local model uses two kind of numerical methods for the different steps of analysis. In particular the first step of the Hierarchical procedure is performed by the Finite Element code Patran/NastranTM, while the local analysis is performed by using a Boundary Element code based on the multidomain anisotropic technique. The accuracy and the effectiveness of the model have been demonstrated analysing classical stress concentration problems. Then the procedure has been used to analyze more complex structure among which a riveted patch repair, applied…
  • More
  •   Views:623       Downloads:551        Download PDF
  • Extension of Fictitious Crack Model to Self-Affine Cracks
  • Abstract The concepts associated with concrete crack formation and propagation is discussed in the light of fractal and probability theories. These concepts are employed to model the tortuous crack path in a highly heterogeneous medium of concrete. Fictitious Crack Model (FCM)[1] is extended to analyze plain concrete beams with such tortuous cracks. The parametric study has been carried out in order to obtain the influence of various fracture parameters on the beam response.
  • More
  •   Views:631       Downloads:576        Download PDF
  • Impact Damage Detection in Composite Sandwich Structures by Low Frequency Lamb Waves
  • Abstract A cost and time effective inspection strategy for in-service health monitoring of composites is demonstrated using the fundamental anti-symmetric A0 Lamb mode at frequencies of 15-20 kHz. In principle, this method involves analysis of the transmitted and/or reflected wave after interacting with the test-piece boundaries or discontinuities (defects). In the present work, the applicability of the technique to composite sandwich structures is explored.
  • More
  •   Views:598       Downloads:629        Download PDF
Displaying 911-920 on page 92 of 914. Per Page