Contact Definitions

For the contact of the dummy model to the vehicle and the seat, an automatic surface to surface contact is proposed. For this contact definition, a property set (SET_PART ID : 1500) has been defined in the dummy input file. This property set includes all properties of the ES-2(re) model which are necessary for the dummy to environment contact definition.

The usage of a single surface contact is not recommended. This might interfere with the contact definitions of the dummy model itself. To remove the dummy model from the used *AUTOMATIC_SINGLE_SURFACE contact, a second property set (SET_PART ID : 1501) has been defined. This property set includes all properties of the dummy model, thus making it very convenient for it to be added to a used exclude list of the *AUTOMATIC_SINGLE_SURFACE contact for the whole vehicle.

The following picture depicts properties used in property sets 1500 & 1501:

Contact_Parts

Parts used in contact definition

Optional contact shells :

A separate property (PID 740) has been defined. This property is used for null shell elements closing physical gaps of the dummy model (For example between the pelvis and the jacket). DYNA-more prepared a separate include file. This include file is called es2_v9.0_nullshells.key; it includes null shell elements of property 740. These null shells can be helpful for some problems arising in the dummy to environment contact. The usage of these contact shells is optional and will not change the results of the ES-2re barrier tests. The figure below shows the null shell contact elements (red coloured).

Fig.25

Optional contact shells (Red coloured)