contact history command

Syntax

contact history <id id > s keyword ...

Primary keywords:

force    force-x    force-y    force-z    gap    localforce-y    localforce-z    localmomenton1-x    localmomenton1-y    localmomenton1-z    localmomenton2-x    localmomenton2-y    localmomenton2-z    mechanical    momenton1    momenton1-x    momenton1-y    momenton1-z    momenton2    momenton2-x    momenton2-y    momenton2-z    normalforce    position-x    position-y    position-z    shearforce    thermal

Add a contact history. A history is a floating point variable that can be sampled and stored during a model run. The optional id directly following history creates a history with the specified ID. If not specified, then the next available history ID is used. The s value identifies the contact type (i.e., ball-ball, ball-pebble, ball-facet, or pebble-facet). Following one of the keywords given below, either 1) a position vector or 2) an additional id keyword must be given to define the specific contact. See the contact history command for details regarding the manipulation of histories.

By default, only mechanical contacts are considered.

force

Magnitude of the contact force.

force-x

The \(x\)-component of the contact force.

force-y

The \(y\)-component of the contact force.

force-z (3D ONLY)

The \(z\)-component of the contact force.

gap
Contact gap.
localforce-x

The \(x\)-component of the contact force in the contact coordinate system.

localforce-y

The \(y\)-component of the contact force in the contact coordinate system.

localforce-z (3D ONLY)

The \(z\)-component of the contact force in the contact coordinate system.

localmomenton1-x (3D ONLY)

The \(x\)-component of the contact moment on end 1 in the contact coordinate system.

localmomenton1-y (3D ONLY)

The \(y\)-component of the contact moment on end 1 in the contact coordinate system.

localmomenton1-z (3D ONLY)

The \(z\)-component of the contact moment on end 1 in the contact coordinate system.

localmomenton2-x (3D ONLY)

The \(x\)-component of the contact moment on end 2 in the contact coordinate system.

localmomenton2-y (3D ONLY)

The \(y\)-component of the contact moment on end 2 in the contact coordinate system.

localmomenton2-z (3D ONLY)

The \(z\)-component of the contact moment on end 2 in the contact coordinate system.

mechanical

Apply to mechanical contacts.

momenton1

The {contact moment on end 1 in 2D; magnitude of the contact moment on end 1 in 3D}.

momenton1-x (3D ONLY)

The \(x\)-component of the contact moment on end 1.

momenton1-y (3D ONLY)

The \(y\)-component of the contact moment on end 1.

momenton1-z (3D ONLY)

The \(z\)-component of the contact moment on end 1.

momenton2

The {contact moment on end 2 in 2D; magnitude of the contact moment on end 2 in 3D}.

momenton2-x (3D ONLY)

The \(x\)-component of the contact moment on end 2.

momenton2-y (3D ONLY)

The \(y\)-component of the contact moment on end 2.

momenton2-z (3D ONLY)

The \(z\)-component of the contact moment on end 2.

normalforce

Contact force in the normal direction.

position-x

The \(x\)-component of the contact position.

position-y

The \(y\)-component of the contact position.

position-z (3D ONLY)

The \(z\)-component of the contact position.

shearforce

Magnitude of the shear contact force.

thermal

Apply to thermal contacts.

Usage Example

contact history ball-ball force-x id 1

contact history ball-ball force id 1