Learning Forum

[josengo2]

Hi all, in LS DYNA 3D peridynamics, how is the horizon size calculated? I saw in 2D, the characteristic length is the diagonal of the 2D element, but in 3D how can the horizon size be determined/calculated?

[Bo Ren]

The characteristic length is the maximum length of the diagonals of the 3D element.

[josengo2]

Thanks a lot, I would also like to ask about the bond-stretch, how is it calculated in 3D elements?

 

[helgaella99]

Thanks, Bo Ren, that clears up the horizon size subway surfers part. Regarding bond-stretch in 3D elements—does LS-DYNA use the same basic formula as in 2D, i.e., based on the relative displacement and initial bond length? Or is there a different implementation for 3D cases I should be aware of (especially with irregular element shapes)?