# Pseudo-Solid Lame LAMBDA#

Pseudo-Solid Lame LAMBDA = CONSTANT <float> [M/Lt2]


## Description / Usage#

This card is required only for TOTAL_ALE mesh motion types (see Mesh Motion card) and is used to specify the model for the Lame coefficient $$\lambda$$ for the mesh motion elasticity (see Sackinger et al., 1995).

This material parameter currently has only one possible model type (CONSTANT) with only a single required input value, as follows:

 CONSTANT Name of the Lame LAMBDA coefficient model. - Standard value of μ (or the shear modulus G for the mesh). See Pseudo-Solid Constitutive Equation card.

## Examples#

The following is a sample input card:

Pseudo-Solid Lame LAMBDA = CONSTANT 1.


This card specifies that the current material have a constant shear modulus of 0.5 for the mesh elasticity. Note that the real-solid mesh Lame MU is set with the Lame MU card.

## Technical Discussion#

See discussion on Lame LAMBDA card and Solid Constitutive Equation card for more details. The main difference here is that this modulus is applied only to the moving mesh, and not the real solid as in an ALE solid mechanics simulation.

## References#

GT-005.3: THE NEW TOTAL-ARBITRARY-LAGRANGIAN-EULERIAN (TALE) CAPABILITY and its applicability to coating with/on deformable media, August 6, 1999, P. R. Schunk

Sackinger, P. A., Schunk, P. R. and Rao, R. R. 1995. “A Newton-Raphson Pseudo-Solid Domain Mapping Technique for Free and Moving Boundary Problems: A Finite Element Implementation”, J. Comp. Phys., 125 (1996) 83-103.