Viscous branch definition
- @VISCOUS_BRANCH_DEFINITION {
- @VISCOUS_BRANCH_NAME {EldVscName} {
- @MAXWELL_FLUID_BRANCH {
- @STIFFNESS_COEFFICIENT {k_{v}}
- @RELAXATION_TIME {τ}
- }
- @HOFER_LION_BRANCH {
- @STIFFNESS_COEFFICIENT {k_{v}}
- @MATERIAL_CONSTANT_TAU0 {τ_{0}}
- @MATERIAL_CONSTANT_DI {d_{1}, ..., d_{n}}
- @MATERIAL_CONSTANT_TAU_QI {τ_{q1}, ..., τ_{qn}}
- }
- @HAUPT_SEDLAN_BRANCH {
- @STIFFNESS_COEFFICIENT {k_{v}}
- @MATERIAL_CONSTANT_ZMAX {z_{max}}
- @MATERIAL_CONSTANT_ZMIN {z_{min}}
- @MATERIAL_CONSTANT_ZQ {z_{q}}
- @MATERIAL_CONSTANT_ZETA {ζ}
- @MATERIAL_CONSTANT_XI {ξ}
- }
- @COMMENTS {CommentText}
- }
- }
Introduction
Figure 1. Configuration of the plastic branch.
The viscous branch, shown in fig. 1, is a component of an elastomeric damper model. It features an elastic spring of stiffness constant k_{v} and a viscous element. Three models are available to describe the viscous behavior of the system. The models are mutually exclusive and are introduced by one of the following three keywords.
- @MAXWELL_FLUID_PARAMETERS: the viscous branch is a Maxwell fluid element.
- @HOFER_LION_PARAMETERS: the viscous branch is described by the simplified Höfer-Lion model.
- @HAUPT_SEDLAN_PARAMETERS: the viscous branch is described by the Haupt-Sedlan model.
NOTES
- All three models require the definition of the stiffness coefficient, k_{v}.
- When defining the Höfer-Lion model, material constant τ_{0} must be defined. Materials constant d_{i} and τ_{qi} are defined in pairs and an equal number of them must be defined. If all d_{i} = 0 and τ_{qi} = 0, the model degenerates and becomes identical to the Maxwell fluid model. (Default values: d_{i} = 0,τ_{qi} = 0.)
- When defining the Haupt-Sedlan model, material constant z_{max}, z_{min}, and z_{q} must be defined. If ζ = 0 the model degenerates and the internal state becomes a constant, z = z_{max}. If both ζ = 0 and ξ = 0 the model further degenerates and becomes identical to the Maxwell fluid model. (Default values: ζ = 0, ξ = 0.)
- It is possible to attach comments to the definition of the object; these comments have no effect on its definition.