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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › Problem with tension, SPG mesh and fatigue › Reply To: Problem with tension, SPG mesh and fatigue

July 8, 2024 at 3:44 pm
Ram Gopisetti
Ansys Employee

Hi, 

SPG operates on the background FEA mesh. In areas prone to erosion or where contact occurs, the mesh needs to be finer. Additionally, the SPG solution should be presented as particles rather than a mesh.

The SPG card parameters used are incorrect, especially in lines 4 and 3. It's recommended to use coupling_spg_to_surface cards for the contact.

For drilling applications, we typically use SMSTEP = 5, IDAM = 5, KERNEL = 1, DX, DY, DZ = 1.8. ITB can be set to 3 or 1. Please note that fatigue may not be considered for SPG.

Cheers, Ram 

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