SOFT=2 - what does depth=25/35 do
Kara Laing
From the manual, "For SOFT = 2, the DEPTH parameter controls several additional options for segment based contact.
...
6. DEPTH = 25 or 35. The penetration checking is similar to DEPTH=5 but use new
methods to try to improve robustness."
Has the change been detailed anywhere please?
Many thanks!
Kara
James M. Kennedy
Dear Kara,
A note that I found that may be of some help.
For contact of sharp-edged surfaces, set SOFT=2 on Optional Card A.
SOFT=2 is also referred to as segment-based contact and so is not applicable to any NODE_TO_SURFACE
type contacts. Two important companion variables to SOFT=2 are SBOPT and DEPTH.
SBOPT: Unless sliding between surfaces is prevalent, set SBOPT=3. When sliding is prevalent, set SBOPT=5.
DEPTH: DEPTH=13 or 23 is recommended unless shell edge-to-edge contact must be considered, in which
case set DEPTH=25 or 35.
Please note that SOFT=2 contact carries some additional expense as compared to SOFT=0 or 1, particularly
using non-default values of SBOPT or DEPTH.
Sincerely,
James M. Kennedy
KBS2 Inc.
June 14, 2021
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