Wrinkling of Orthotropic Viscoelastic Membranes
This paper presents a simplified simulation technique for orthotropic viscoelastic films. Wrinkling is detected by a combined stress-strain criterion and an iterative scheme searches for the wrinkle angle using a pseudo-elastic material stiffness matrix based on a nonlinear viscoelastic constitutive model. This simplified model has been implemented in ABAQUS/Explicit and is able to compute the behavior of a membrane structure by superposition of a small number of response increments. The model has been tested against a published solution for a time-independent isotropic membrane under simple shear and also against experimental results on StratoFilm 420 under simple shear.
© 2010 by X. Deng and S. Pellegrino. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. We thank the NASA Super-Pressure Balloon team for their contributions to this research. In particular, Dr Loren Seely (Aerostar International) has provided film samples, Dr David Wakefield (Tensys Dynamics Ltd) and Dr Jim Rand (Winzen Engineering, Inc.) have helped with many comments. This research was supported by the NASA Balloon Program Office (contract monitor Danny Ball).
Published - Deng_AIAA_2010_2670.pdf