TY - JOUR
T1 - Cure-induced and thermal stresses in a constrained epoxy resin
AU - Merzlyakov, Mikhail
AU - McKenna, Gregory B.
AU - Simon, Sindee L.
N1 - Funding Information:
This work was financially supported by Air Force Office of Scientific Research under award number F49620-01-1-0079.
PY - 2006/4
Y1 - 2006/4
N2 - We report results from a study of isotropic residual stress development for thermosetting resins during cure and subsequent thermal cycling. We use a recently developed thick-walled tube method to impose three-dimensional isotropic constraints on the resin. The strains at the outer surface of the thick-walled tube are monitored by strain gauges. Experiments are performed for a closed tube where the resin is cured in the compressive state and in an open tube where tensile stresses build up at gelation. The cure-induced tensile stresses are much lower than expected from cure shrinkage due to the inability of the curing resin to sustain large tensile stresses in the gel-state.
AB - We report results from a study of isotropic residual stress development for thermosetting resins during cure and subsequent thermal cycling. We use a recently developed thick-walled tube method to impose three-dimensional isotropic constraints on the resin. The strains at the outer surface of the thick-walled tube are monitored by strain gauges. Experiments are performed for a closed tube where the resin is cured in the compressive state and in an open tube where tensile stresses build up at gelation. The cure-induced tensile stresses are much lower than expected from cure shrinkage due to the inability of the curing resin to sustain large tensile stresses in the gel-state.
KW - A. Thermosetting resins
KW - B. Residual/internal stress
KW - D. Mechanical testing
KW - Thermal pressure coefficient
UR - http://www.scopus.com/inward/record.url?scp=33144474651&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2005.05.013
DO - 10.1016/j.compositesa.2005.05.013
M3 - Article
AN - SCOPUS:33144474651
SN - 1359-835X
VL - 37
SP - 585
EP - 591
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
IS - 4
ER -