Without affecting the integrity or stability of heritage monuments, vibration-based techniques provide useful solutions for acquiring global information about them. By studying dynamic response to suitable excitation sources, it is feasible define mechanical characteristics structures and identify locate defects in their behaviour. Laser Doppler vibrometry (LDV), which enables non-contact measu...

The successful operation of proposed precision spacecraft will require finite element models that are accurate to much higher frequencies than the standard application. The hallmark of this mid-frequency range, between low frequency modal analysis and high frequency statistical energy analysis, is high modal density. The modal density is so high, and the sensitivity of the modes with respect to...

in this paper the critical strain energy release rate for t300/913 carbon-epoxy laminated composites has been studied using ansys finite element software based on virtual crack closure technique ( vcct ). compact tension ( ct ) specimen has been used for numerical analyses and the geometrical dimensions have been extracted from the existing references. the results obtained from the finite eleme...