6.4. Contact

The contact is that two bodies are affected by their forces after they contact each other. It is important in the mechanical system as a cam and latch device. On the contrary to this, it is caused by abnormal vibration and noise. If a contact is defined between two geometries, you can calculate a contact force by the amount of interface and give it to each body.

RecurDyn supports various contact entities such as following table. The user can create the contact forces by using the contact entities in the Contact group.

Table 6.22 Contact Entities

General	Primitive 3D	2D
Solid	Sphere To Sphere	Geo Curve
Geo Surface	Sphere In Sphere	Geo Circle
Geo Sphere	Sphere To Cylinder	Circle To Circle
Geo Cylinder	Sphere In Cylinder	Circle In Circle
Geo Curve To Surface	Sphere To Box	Circle To Curve
Geo Curve 3D	Sphere In Box	Curve To Curve
Geo Sphere To Curve 3D	Sphere To Torus	Cam2D
Sphere To Surface	Sphere In Torus	Cam Line2D
Cylinder To Surface	Sphere To Cone
UV Sphere	Sphere In Cone
	Cylinder To Cylinder
	Cylinder In Cylinder
	Cylinder To Box
	Cone To Cone
	Cone In Cone
	Cone To Cylinder
	Sphere To Arc Revolution
	Sphere To Arc Extrusion

The contact of a simple geometry as sphere is light the load of contact calculation and is easy to set each parameter. On the contrary to this, the contact of a surface or patch is high to general characteristic and can define any surface. Instead, the parameter setting becomes complex and the load of contact calculation is high. Therefore, you should use the contact of simple geometry.

Guideline for RecurDyn Contact Type

There are 3 types of contact.

• Primitive Contact such as Sphere to Sphere.

• Semi-Primitive Contact such as Sphere to Surface

• General Contact such as Surface to Surface, Extended Surface to Surface, Solid, and Geo contacts.

Recommended Selection of RecurDyn Contact entities

1. If you can apply the primitive contact, please use Primitive Contact.

2. If you can apply the semi-primitive contact, please use Semi-Primitive Contact. For this type of contact, FB tries to implement with Geo Surface contact in future.

3. For the general contact problem, you can choose Solid or Geo Surface contact.

4. For the rigid contact and convex-convex problem, you can choose the Solid contact for more fast solution.

Recommended Selection of RecurDyn Contact entities [2D problem]

1. If you can apply the primitive contact, please use Primitive Contact such as Circle to Circle.

2. If you can apply the semi-primitive contact, please use Semi-Primitive Contact. For this type of contact, FB tries to implement with Geo Curve contact in future.

3. For the general contact problem, you can choose Geo Curve contact. If you want to use Curve to Curve contact, please use Geo Curve contact.

• 6.4.1. Common UI
  • 6.4.1.1. General Page
  • 6.4.1.2. Characteristic Page
    • 6.4.1.2.1. Friction
  • 6.4.1.3. Characteristic Page for Solid Contact
    • 6.4.1.3.1. Appendix I Modification Rules for the Solid Contact - Detailed Contact Options
  • 6.4.1.4. Characteristic Page for Geo Contact
  • 6.4.1.5. Contact Page
  • 6.4.1.6. Multiple Contact
• 6.4.2. General Contact
  • 6.4.2.1. Geo Surface
    • 6.4.2.1.1. Modeling Options
    • 6.4.2.1.2. Properties
  • 6.4.2.2. Geo Sphere
    • 6.4.2.2.1. Modeling Options
    • 6.4.2.2.2. Properties
  • 6.4.2.3. Geo Cylinder
    • 6.4.2.3.1. Modeling Options
    • 6.4.2.3.2. Properties
  • 6.4.2.4. Geo Curve To Surface
    • 6.4.2.4.1. Modeling Options
    • 6.4.2.4.2. Properties
  • 6.4.2.5. UV Sphere
    • 6.4.2.5.1. Modeling Options
    • 6.4.2.5.2. Properties
  • 6.4.2.6. Solid
    • 6.4.2.6.1. Modeling Options
    • 6.4.2.6.2. Properties
  • 6.4.2.7. Sphere To Surface
    • 6.4.2.7.1. Modeling Options
    • 6.4.2.7.2. Properties
  • 6.4.2.8. Cylinder To Surface
    • 6.4.2.8.1. Modeling Options
    • 6.4.2.8.2. Properties
  • 6.4.2.9. Geo Curve 3D Contact
    • 6.4.2.9.1. Modeling Options
    • 6.4.2.9.2. Properties
  • 6.4.2.10. Geo Sphere To Curve 3D Contact
    • 6.4.2.10.1. Modeling Options
    • 6.4.2.10.2. Properties
• 6.4.3. Primitive 3D Contact
  • 6.4.3.1. Sphere To Sphere
    • 6.4.3.1.1. Modeling Options
    • 6.4.3.1.2. Properties
  • 6.4.3.2. Sphere In Sphere
    • 6.4.3.2.1. Modeling Options
    • 6.4.3.2.2. Properties
  • 6.4.3.3. Sphere To Cylinder
    • 6.4.3.3.1. Modeling Options
    • 6.4.3.3.2. Properties
  • 6.4.3.4. Sphere In Cylinder
    • 6.4.3.4.1. Modeling Options
    • 6.4.3.4.2. Properties
  • 6.4.3.5. Sphere To Cone
    • 6.4.3.5.1. Modeling Options
    • 6.4.3.5.2. Properties
  • 6.4.3.6. Sphere In Cone
    • 6.4.3.6.1. Modeling Options
    • 6.4.3.6.2. Properties
  • 6.4.3.7. Sphere To Box
    • 6.4.3.7.1. Modeling Options
    • 6.4.3.7.2. Properties
  • 6.4.3.8. Sphere In Box
    • 6.4.3.8.1. Modeling Options
    • 6.4.3.8.2. Properties
  • 6.4.3.9. Sphere To Torus
    • 6.4.3.9.1. Modeling Options
    • 6.4.3.9.2. Properties
  • 6.4.3.10. Sphere In Torus
    • 6.4.3.10.1. Modeling Options
    • 6.4.3.10.2. Properties
  • 6.4.3.11. Sphere To Arc Revolution
    • 6.4.3.11.1. Modeling Options
    • 6.4.3.11.2. Properties
  • 6.4.3.12. Sphere To Arc Extrusion
    • 6.4.3.12.1. Modeling Options
    • 6.4.3.12.2. Properties
  • 6.4.3.13. Cylinder To Cylinder
    • 6.4.3.13.1. Modeling Options
    • 6.4.3.13.2. Properties
  • 6.4.3.14. Cylinder In Cylinder
    • 6.4.3.14.1. Modeling Options
    • 6.4.3.14.2. Properties
  • 6.4.3.15. Cylinder To Box
    • 6.4.3.15.1. Modeling Options
    • 6.4.3.15.2. Properties
  • 6.4.3.16. Cone To Cylinder
    • 6.4.3.16.1. Modeling Options
    • 6.4.3.16.2. Properties
  • 6.4.3.17. Cone To Cone
    • 6.4.3.17.1. Modeling Options
    • 6.4.3.17.2. Properties
  • 6.4.3.18. Cone In Cone
    • 6.4.3.18.1. Modeling Options
    • 6.4.3.18.2. Properties
• 6.4.4. 2D Contact
  • 6.4.4.1. Geo Curve
    • 6.4.4.1.1. Modeling Options
    • 6.4.4.1.2. Properties
  • 6.4.4.2. Geo Circle
    • 6.4.4.2.1. Modeling Options
    • 6.4.4.2.2. Properties
  • 6.4.4.3. Cam 2D
    • 6.4.4.3.1. Modeling Options
    • 6.4.4.3.2. Properties
  • 6.4.4.4. CamLine 2D
    • 6.4.4.4.1. Modeling Options
    • 6.4.4.4.2. Properties
  • 6.4.4.5. Circle To Circle
    • 6.4.4.5.1. Modeling Options
    • 6.4.4.5.2. Properties
  • 6.4.4.6. Circle In Circle
    • 6.4.4.6.1. Modeling Options
    • 6.4.4.6.2. Properties
  • 6.4.4.7. Circle To Curve
    • 6.4.4.7.1. Modeling Options
    • 6.4.4.7.2. Properties
  • 6.4.4.8. Curve To Curve
    • 6.4.4.8.1. Modeling Options
    • 6.4.4.8.2. Properties