Abstract
Residual (curing) stresses in a cross-ply laminated plate are related to the strains released when individual plies are separated. Released displacements are determined using high-sensitivity moiré interferometry and linearized strain-displacement equations are used to determine residual strains. Elastic orthotropic stress-strain relations are used to calculate residual stresses remote from free-edges of a [9020/020/9020] graphite-epoxy cross-ply panel. The measured strains compare favorably with those predicted by laminated plate theory. In a second example, the circumferential and radial residual strains and stresses at the end-section of a thick-walled cross-ply graphite-epoxy cylinder are determined.
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Gascoigne, H.E. Residual surface stresses in laminated cross-ply fiber-epoxy composite materials. Experimental Mechanics 34, 27–36 (1994). https://doi.org/10.1007/BF02328439
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DOI: https://doi.org/10.1007/BF02328439