Using Simple Springs
Use a simple spring to connect two points, two vertices, a point to a point on an edge or a surface, a point to a pattern of points, or a point to a single point feature. You need not specify an orientation for simple springs.

You cannot define a zerolength simple spring.

Use the following items in the Properties area of the Spring Definition dialog box to define a simple spring:
• Extensional ForceDeflection Variation—Specify whether the extensional stiffness of the spring is of constant stiffness or is defined by a
forcedeflection curve.
Select one of the following stiffness types:
◦ Constant Stiffness—Creates a spring with constant stiffness.
◦ ForceDeflection Curve—Creates a nonlinear spring with variable stiffness.
• Force Factor—Magnification factor that together with the forcedeflection function defines extensional stiffness. This box is available only when you select ForceDeflection Curve. Type a nonnegative real number value for the force factor. Select the units of force from the adjacent dropdown list. The forcedeflection curve function is multiplied by the force factor to give the value of extensional stiffness of the spring.

The value of Force Factor cannot be negative. Additionally, it cannot be 0 when the Torsional Stiffness is 0.

• Extensional Stiffness—The stiffness that resists the stretching or compression of the spring. You can type a realnumber value or an expression that contains parameter names.
Select units for the extensional stiffness from the dropdown list or accept the default unit.
• Torsional Stiffness—The stiffness that resists the twisting of the spring. You can type a realnumber value or an expression that contains parameter names.
Select units for the torsional stiffness from the dropdown list or accept the default unit.

You can specify a torsional stiffness value only for 3D models.

Extensional and torsional stiffness boxes are
parametercapable edit fields. They can accept
Creo Parametric parameters as stiffness values, which you can select from a displayed list.

If you are using a simple spring to join two parts, make sure that the parts are attached to each other, or they are constrained.
