Modeling and simulation of an impact test using wavelets, analytical solutions and finite elements

An instrumented falling weight impact test is thoroughly investigated in two cases, that of a rebound and that of a rupture in the sample. First, the force signal is analyzed with four methods: the continuous wavelet transform (with different wavelets: derivatives of a Gaussian and Morlet's), the Gabor transform, the Wigner–Ville transform and the classical Fourier analysis. It is shown how a proper use of the time–frequency methods allows to precisely detect the discontinuities in the signal, the moment of rupture, if any, and the frequencies that are excited at the impact. In a second part, modal and stress analyses are carried out, both by an analytical method and by finite element computations. The results confirm those obtained in the first part and agree with experimental findings.


Published in:
International Journal of Solids and Structures, 33, 5481-5508
Year:
2001
Keywords:
Laboratories:




 Record created 2006-06-14, last modified 2018-12-03

n/a:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)