Coupled instabilities for a thick elastic plate under thrust
For a thick incompressible hyperelastic plate under biaxial thrust, flexural and constitutive (homogeneous) instabilities are considered. In the present study their interaction (coupling) is discussed, when the critical conditions coincide for both kinds of instabilities. With the help of branching theory, especially the Fredholm Alternative theorem, the interactive post-critical equilibrium configurations are defined.
This paper computed No.17 coupler yoke' stress intensity factors based on 1/4 displacement method of finite element method,calculated the crack propagation life of No.17 coupler yoke using Paris formula based on AAR spectrum,and given analysis and evaluation for the result.