Manufacturing Solutions

Moving Boundary Analysis

Moving Boundary Analysis

Previous topic Next topic No expanding text in this topic  

Moving Boundary Analysis

Previous topic Next topic JavaScript is required for expanding text JavaScript is required for the print function  

MovingBoundary

L = Billet Length

L1 = Butt Length (Typically 0.5 inches)

L2 = Pocket Length

 

Flat die without pockets (L2 = 0)


Extrusion direction should be positive Z-axis.
Mesh such that Z=0 at the front end of the billet.
If L1 is the butt length, define a mesh such that it has at least two elements in between Z = 0 (die face) and Z = -L1/2. These elements will not move during the analysis.

 

Flat die with pockets (L2 > 0)


Extrusion direction should be positive Z-axis.
Mesh such that Z=0 at the front end of the billet.
If L1 is the butt length, define a mesh such that it has at least two elements in between Z = 0 (die face) and Z = -L1/2. These elements will not move during the analysis.

 

Hollow Die


Extrusion direction should be positive Z-axis.
Mesh such that Z=0 at the front end of the billet.
If L1 is the butt length, define a mesh such that it has at least two elements in between Z = 0 (die face) and Z = -L1/2. These elements will not move during the analysis.
Collapsed elements in the billet become very thin in the extrusion direction. This might lead to bad element-grading in the butt area. Therefore, it is advisable to occasionally refine elements in L1 area in the Z-direction.
If using higher-order elements (Hex20 or Hex27), Butt's boundary should match element faces (element faces should fall at Z= -L1).

 

 

See Also:

Guidelines for Simulation