/H3D/NODA

Format

/H3D/NODA/Keyword3/Keyword4

#optional next line(s) that lists the parts to save results for.

part_ID₁... part_ID_N

Example

/H3D/NODA/VEL

/H3D/NODA/PCONT
356 293

Definitions

Comments

1. When PART IDs are listed after the /H3D/NODA line the specified results will only be output for those parts.
2. Output can be a, scalar, vector, or tensor as defined.

   Table 1. Scalar Output

   Keyword3	Keyword4	Description
   DAMA2		Damage for TYPE2 interface. 2
   DENS		Element density extrapolated to attached nodes for 3D ALE and FVM nodes of external and internal airbag surfaces.
   DINER		Nodal inertia change 3
   DMASS		Nodal mass change 4
   DT		Nodal time step
   ENER		Element specific energy reported to node
   GPS1	P	Element pressure extrapolated to node
   	VONM	Element von Mises stress extrapolated on node
   MASS		Nodal mass
   NDMASS		Non-diagonal mass variation (see time step control /DT/AMS) 5
   NVAR1, NVAR2, ...NVAR5		Nodal Variable 1,2 …5
   P		Element pressure extrapolated to attached nodes for 3D ALE and FVM nodes of external and internal airbag surfaces.
   SCHLI		Nodal Schlieren
   STIF		Nodal translational stiffness
   STIFR		Nodal rotational stiffness
   TEMP		Nodal temperature for thermal exchange or element temperature extrapolated to attached nodes for 3D ALE and FVM nodes of external and internal airbag surfaces.
   VFRAC		Nodal Volumetric Fraction where the element volumetric fraction extrapolated to attached nodes in LAW37 and LAW51.
   ZVFRAC		Nodal Volumetric Fraction.

   Table 2. Vector Output

   Data	Keyword4	Description
   ACC		Node acceleration
   CLUSTER	FORCE MOMENT	Spotweld /CLUSTER force or Moment vector in global coordinates
   CONT		Node contact forces
   CONT2		Tied interface contact force (INTER/TYPE2)
   DIS		Node displacement
   DROT		Node rotation Idrot= 1 must also be set in /IOFLAG; otherwise, rotational degree of freedom (DOF) are not computed and this option is ignored.
   FEXT		External force
   FINT		Internal force
   FOPT		Forces or Moments for rigid bodies, rigid walls and sections.
   FRES		Residual force (FEXT – FINT)
   FREAC		Reaction forces for imposed velocities, displacements, accelerations and boundary conditions.
   MREAC		Reaction moments for imposed velocities, displacements, accelerations and boundary conditions.
   FVEL		Gas velocity vectors for fluid flow in Finite Volume Method monitored volume, /FVMBAG1
   PCONT		Normal or tangential contact pressure 6
   VEL		Node translational velocity

   Table 3. Tensor Output

   Data	Keyword4	Description
   GPS		Mean nodal stress calculated from the element shape functions 7 Only available with solids elements with /PROP/TYPE6 (SOL_ORTH), /PROP/TYPE14 (SOLID), /PROP/TYPE20 (TSHELL), /PROP/TYPE21 (TSH_ORTH) and /PROP/TYPE22 (TSH_COMP)
   GPS1		Mean stress of elements connected to node. Only available /BRICK and /TETRA4. The stress of the corner node is extrapolated from mean stress at integration point in all elements which are connected to this node.
   GPS2		Mean (using relative element volume) stress of elements connected to node. Only available /BRICK and /TETRA4. The stress of corner node is extrapolated from stress at integration point.

3. DAMA2 damage percentages for /INTER/TYPE2 with rupture (Spot_flag = 20, 21, or 22):(1)
   $$\min \left(100,100\cdot \frac{normalrelativedisplacement}{\max normalrelativedisplacement}\right)$$
   (2)
   $$\min \left(100,100\cdot \frac{\mathrm{tangent}relativedisplacement}{\max tangentrelativedisplacement}\right)$$
4. (3)
   $$DINER=\left(\frac{Inertia\left(t\right)-I_0}{I_0}\right)$$
   Where,

   I₀

   Nodal inertia at the beginning of the current run and Inertia(t) is the current inertia

5. $DMASS=\left(\frac{\text{Δ}M}{M_0}\right)$ with $\text{Δ}M=M-M_0$
   Where,

   M₀

   Nodal mass at the beginning of the restart

   M

   Current mass

   Note: $\text{Δ}M$ is re-set to 0 at the beginning of each restart file.
6. When /DT/AMS is used, a non-diagonal mass matrix is used to increase the time step. On each line of the mass matrix, the lumped mass M₀ is increased with some value $\text{Δ}M$ which is compensated with non-diagonal terms such that the total mass to remain constant.(4)
   $$NDMAS=\left(\frac{\text{Δ}M}{M_0}\right)$$
7. For PCONT, two nodal vectors are output:(5)
   $$P_n=\frac{F_n}{S},P_t=\frac{F_t}{S}$$
   Where,

   F_n

   Sum of normal contact forces applied to the node

   F_t

   Sum of tangential contact forces applied to the node

   S

   Extrapolated surface of segments connected to the node

8. The stress of the corner node is computed using bilinear extrapolation of the shape function from stress at integration points of each element which are connected to this node. For thick shell properties, bilinear extrapolation is computed using integration points of upper and lower layers.