TY - GEN
T1 - Inverse analysis of constitutive relation for epoxy resin materials
AU - Yekani Fard, Masoud
AU - Liu, Yingtao
AU - Chattopadhyay, Aditi
PY - 2011/12/1
Y1 - 2011/12/1
N2 - A multilinear parametric uniaxial stress strain approach has been used to obtain the closed form nonlinear load deflection response based on strain compatibility in bending for epoxy resin materials. A constitutive model for tension and compression of resin polymeric material is proposed. The model consists of a bilinear ascending curve followed by strain softening and constant plastic flow in tension and compression. The model is described by two main parameters; modulus of elasticity in tension and strain at the proportional elastic limit point in tension, in addition to twelve non-dimensional tension and compression parameters. Moment curvature equations, deformation localization, and static equilibrium conditions were used to simulate the flexural load deflection response of a beam under three-point bending and four-point bending conditions. Results show a considerable underestimation in flexural load carrying capacity if the uniaxial tension and compression stress strain curves are directly used.
AB - A multilinear parametric uniaxial stress strain approach has been used to obtain the closed form nonlinear load deflection response based on strain compatibility in bending for epoxy resin materials. A constitutive model for tension and compression of resin polymeric material is proposed. The model consists of a bilinear ascending curve followed by strain softening and constant plastic flow in tension and compression. The model is described by two main parameters; modulus of elasticity in tension and strain at the proportional elastic limit point in tension, in addition to twelve non-dimensional tension and compression parameters. Moment curvature equations, deformation localization, and static equilibrium conditions were used to simulate the flexural load deflection response of a beam under three-point bending and four-point bending conditions. Results show a considerable underestimation in flexural load carrying capacity if the uniaxial tension and compression stress strain curves are directly used.
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U2 - 10.2514/6.2011-1746
DO - 10.2514/6.2011-1746
M3 - Conference contribution
AN - SCOPUS:84872453515
SN - 9781600869518
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
BT - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 4 April 2011 through 7 April 2011
ER -