TY - GEN
T1 - Characterization and modeling of polymeric matrix under static and dynamic loading
AU - Werner, Brian T.
AU - Daniel, Isaac M.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - A polymeric matrix (3501-6) used in composite materials was characterized under multi-axial loading at strain rates varying from quasi-static to dynamic ones. Tests were conducted under uniaxial compression, tension, pure shear and combinations of compression and shear. Quasi-static and intermediate strain rate tests were conducted in a servo-hydraulic testing machine. High strain rate tests were conducted using a split Hopkinson Pressure Bar (Kolsky bar) system built for the purpose. This SHPB system was made of a glass/epoxy composite (Garolite) bars having an impedance that is closer to that of the test polymer than metals. The typical stress-strain behavior of the polymeric matrix exhibits a linear elastic region up to a yield point, a nonlinear elastoplastic region up to an initial peak or "critical stress," followed by a strain softening region up to a local minimum and finally, a strain hardening region up to ultimate failure. A general three-dimensional elasto-viscoplastic model was developed incorporating strain rate effects, and including the large deformation region. The model was formulated in strain space unlike most models in the literature. The stress-strain curves obtained were used to develop and validate the new elasto-viscoplastic constitutive model.
AB - A polymeric matrix (3501-6) used in composite materials was characterized under multi-axial loading at strain rates varying from quasi-static to dynamic ones. Tests were conducted under uniaxial compression, tension, pure shear and combinations of compression and shear. Quasi-static and intermediate strain rate tests were conducted in a servo-hydraulic testing machine. High strain rate tests were conducted using a split Hopkinson Pressure Bar (Kolsky bar) system built for the purpose. This SHPB system was made of a glass/epoxy composite (Garolite) bars having an impedance that is closer to that of the test polymer than metals. The typical stress-strain behavior of the polymeric matrix exhibits a linear elastic region up to a yield point, a nonlinear elastoplastic region up to an initial peak or "critical stress," followed by a strain softening region up to a local minimum and finally, a strain hardening region up to ultimate failure. A general three-dimensional elasto-viscoplastic model was developed incorporating strain rate effects, and including the large deformation region. The model was formulated in strain space unlike most models in the literature. The stress-strain curves obtained were used to develop and validate the new elasto-viscoplastic constitutive model.
KW - Constituive modeling
KW - Dynamic testing
KW - Elasto-plastic behavior
KW - Multi-axial testing
KW - Polymer characterization
KW - Strain rate effects
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U2 - 10.1007/978-1-4614-4238-7_10
DO - 10.1007/978-1-4614-4238-7_10
M3 - Conference contribution
AN - SCOPUS:84869761076
SN - 9781461442370
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 73
EP - 84
BT - Dynamic Behavior of Materials - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
T2 - 2012 Annual Conference on Experimental and Applied Mechanics
Y2 - 11 June 2012 through 14 June 2012
ER -