Effect of microstructural damage on ply stresses in laminated compositesThe mechanisms involved in damage and failure of laminated orthotropic composites are investigated theoretically. The continuum model developed accounts for both matrix cracks and interply delamination using second-order tensor-valued internal-state variables based on the locally averaged microcrack dynamics. The derivation of the model is given in detail, and numerical results for sample problems are presented in extensive graphs and tables. The model is shown to be effective in predicting stresses at the ply level, and significant damage-induced decreases in laminate stress states are found.
Document ID
19890047771
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Allen, D. H. (Texas A&M Univ. College Station, TX, United States)
Nottorf, E. W. (Texas A & M University College Station, United States)
Harris, C. E. (NASA Langley Research Center Hampton, VA, United States)