Progress in the Modeling of the Shock Response and Mitigation of Thick Composite Shells
Abstract
This report is a continuation of our efforts to develop a methodology for predicting the response of thick composite materials subjected to multi- dimensional shock loadings. A focus of this work has been the initiation and evolution of damage in 1D, 2D and 3D composite structures. In addition, dispersion/viscoelastic models have been investigated for 1D structures and implemented. One dimensional damage predictions are made for composite plates subjected to underwater shock. The 1D and 2D continuum damage models are both applied to the impact of a plexiglass flyer and graphite/peek plate, and the results compare very well to experimental data. A new 3D continuum damage theory is developed for thick laminated composite plates. The 3D theory is in part an extension of the 2D transversely isotropic damage theory. However, three dimensional considerations as well as the inefficiencies of modeling individual plies in a thick composite require a slightly different approach. A 3D formulation is developed which applies the damage directly to the stresses, rather than the compliances as in the 2D and 1D theories.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 22, 1993
- Accession Number
- ADA267009
Entities
People
- C. T. Dyka
- P. W. Randles
Organizations
- United States Naval Research Laboratory