TY  - EJOU
AU  - Jiusheng, Ren 

TI  - Elastic Instability of Pseudo-Elastic Rubber Balloons
T2  - Computers, Materials \& Continua

PY  - 2008
VL  - 7
IS  - 1
SN  - 1546-2226

AB  - Elastic instability for the inflation and deflation of a thin-walled spherical rubber balloon is examined within the framework of finite pseudo-elasticity. When a spherical rubber balloon is inflated, it is subject to a complex deformation after a pressure maximum has been obtained. One part of the balloon is lightly stretched while the remainder becomes highly stretched. So an aspherical deformation is observed after the initial spherical inflation. A pseudo-elastic strain energy function including a damage variable which may model the loading, unloading and reloading of rubber is used. The balloon is idealized as an elastic membrane and the inflation, deflation and re-inflation of the balloon is described in detail. Instability of solutions is discussed through energy comparison. Furthermore, the effect of temperature is discussed with a thermo-hyperelastic model and the residual strain is analyzed with a pseudo-elastic strain energy function including a residual strain variable.
KW  - rubber balloon
KW  -  pseudo-elasticity
KW  -  thermo-hyperelasticity
KW  -  aspherical deformation
KW  -  instability

DO  - 10.3970/cmc.2008.007.025