linespring stiffness,

frequency, temperature, field

variable 1, etc....

Abaqus/CAE Usage: P roperty or Interaction module:

SpecialSprings/DashpotsCreate: select

connectivity type: select points: Property:

Spring stiffness: spring stiffness

Defining the spring stiffness as a function of

frequency, temperature, and field variables is

not supported in Abaqus/CAE when you define

springs as engineering features; instead, you

can define connectors that have spring-like

elastic behavior (see ).

Defining nonlinear spring behavior

You define nonlinear spring behavior by giving pairs of force–relative displacement values. These values should be given in ascending order of relative displacement and should be provided over a sufficiently wide range of relative displacement values so that the behavior is defined correctly. Abaqus assumes that the force remains constant (which results in zero stiffness) outside the range given (see ).

Figure 29.1.1–1 Nonlinear spring force–relative displacement relationship.

Initial forces in nonlinear springs should be defined as part of the relationship by giving a nonzero force, , at zero relative displacement. The spring stiffness can depend on temperature and field variables. See , for further information about defining data as functions of temperature and independent field variables.

Abaqus/Explicit will regularize the data into tables that are defined in terms of even intervals of the independent variables. In some cases where the force is defined at uneven intervals of the independent variable (relative displacement) and the range of the independent variable is large compared to the smallest interval, Abaqus/Explicit may fail to obtain an accurate regularization of your data in a reasonable number