A continuum model for damage evolution in laminated compositesThe accumulation of matrix cracking is examined using continuum damage mechanics lamination theory. A phenomenologically based damage evolutionary relationship is proposed for matrix cracking in continuous fiber reinforced laminated composites. The use of material dependent properties and damage dependent laminate averaged ply stresses in this evolutionary relationship permits its application independently of the laminate stacking sequence. Several load histories are applied to crossply laminates using this model, and the results are compared to published experimental data. The stress redistribution among the plies during the accumulation of matrix damage is also examined. It is concluded that characteristics of the stress redistribution process could assist in the analysis of the progressive failure process in laminated composites.
Document ID
19920050499
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lo, D. C. (NASA Langley Research Center Hampton, VA, United States)
Allen, D. H. (Texas A & M University College Station, United States)
Harris, C. E. (NASA Langley Research Center Hampton, VA, United States)