A thermomechanically coupled viscoelastic cohesive zone model at large deformation

摘要: Abstract A new viscoelastic cohesive zone model is formulated for large deformation conditions and within a fully coupled thermomechanical framework. The suitable the simulation of wide range problems especially polymeric materials. It can capture crack propagation as well energy dissipation due to this process. Starting from principles thermodynamics, 3D finite element formulation derived simultaneous solution thermal field field. constructed by extending an elastic exponential traction separation law using simple rheology. viscous part tractions postulated have same characteristic length that they are related single material parameter. Newtonian dashpot used describe evolution separation. Furthermore, effects accounted temperature expressions in both laws viscosity dashpot, heat conduction across interface. implemented implicit code internal variable calculated iteration. Different numerical examples verify comparison with experimental data shows satisfactory agreement.