TOWARD MATERIAL PARAMETERS FOR MODELING DEVICES MADE FROM AN EPDXY-BASED SHAPE MEMORY POLYMER Conference Paper uri icon

abstract

  • Designing devices made from epoxy-based shape memory polymers is difficult because few material behavior parameters are available for these materials in the rubbery/shape changing region. This work examines the rubbery state, greater than 20 C above the glass transition temperature (Tg), as an elastomeric regime suited to characterization with simple tension and planar tension experiments. Differential scanning calorimetry (DSC) results show a 70 C Tg, which agrees with prior research. Simple tension experiments at 100 C exhibited nonlinear elastic behavior, and finite element analysis (FEA) agreed with the constitutive behavior exhibited in the experiments. Planar tension experiments exhibited novel results. The stress/strain response was sigmoidal with a significant plateau in stress followed by rising stress to failure. The typical 10:1 gage width/gage length ratio seemed to over constrain the material. The strain to failure is small, and suggests the material behavior is a hybrid of elastic and hyperelastic behavior.

name of conference

  • Volume 1: Development and Characterization of Multifunctional Materials; Mechanics and Behavior of Active Materials; Modeling, Simulation and Control of Adaptive Systems

published proceedings

  • ASME CONFERENCE ON SMART MATERIALS, ADAPTIVE STRUCTURES AND INTELLIGENT SYSTEMS, 2015, VOL 1

author list (cited authors)

  • Erel, V., Berry, J. L., Srinivasa, A., & Creasy, T. S.

citation count

  • 1

complete list of authors

  • Erel, Veysel||Berry, Jessica L||Srinivasa, Arun||Creasy, Terry S

publication date

  • September 2016