Transient pulse propagation and dynamic analysis of fracture in composite laminated plates
Elastic wave propagation and scattering in composite plates both in frequency and time domains. The fundamental tool used involves Green's functions and they are formulated, based on a propagator matrix method for a laminated composite plate in the frequency domain. Properties of each ply can be transversely isotropic. The transient responses are then obtained by using a fast Fourier transform (FFT). The layering effect on the propagation of elastic waves in a laminated composite plate was studied. Comparisons between laminated plates with different numbers of plies and an equivalent homogenized composite plate were used to investigate the frequency range and the minimum number of piles in a laminated plate with certain thickness for which the equivalent homogenized plate model is valid. Scattering of elastic waves by horizontal cracks in a unidirectional transversely isotropic plate as well as by delamination cracks in an 8-layer cross-ply composite plate was investigated by a hybrid method combining finite element discretization in the near field and boundary integral representation of the far field.
- Research Organization:
- Colorado Univ., Boulder, CO (United States)
- OSTI ID:
- 7203427
- Country of Publication:
- United States
- Language:
- English
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