Difference between AUTO_SURF_TO_SURF_TIEBREAK (Option 1) and TIED_SURF_TO_SURF

[yuka.kusama.9t]

【Difference between CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK (Option 1) and TIED_SURFACE_TO_SURFACE】

The analysis results differ between a model joined with CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK (Option 1) and a model joined with TIED_SURFACE_TO_SURFACE.

What is the difference between CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK (Option 1) and TIED_SURFACE_TO_SURFACE?

CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK (Option 1) is described as follows:
Eq. 1: Tracked nodes that are in contact, or that subsequently come into contact, will permanently stick; tangential motion is inhibited.

For reference, the results from TIED_SURFACE_TO_SURFACE match those from a model with node sharing.

 

【CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK(OPTION1)とTIED_SURFACE_TO_SURFACEの違い】

CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK(OPTION1)で結合したモデルとTIED_SURFACE_TO_SURFACEで結合したモデルで解析結果が異なります．

CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK(OPTION1)とTIED_SURFACE_TO_SURFACEでは何が異なるのでしょうか．

CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAKのOPTION1は以下のような内容です．

 EQ.1: 接触したスレーブ節点はそれ以降固着します．接線方向の動きも許されません．

ちなみに，TIED_SURFACE_TO_SURFACEで結合したモデルの解析結果と，節点共有で結合したモデルの解析結果は同じでした．

よろしくお願いします．

[Satvik]

Hello User,

• TIED_SURFACE_TO_SURFACE enforces a permanent, unbreakable tie with no sliding or separation, suitable for rigid or welded connections.

• CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK allows for initial tying but enables failure and subsequent sliding/separation, making it ideal for modeling debonding or adhesive failure.

• Tiebreak contacts use penalty-based formulations and require careful definition of failure criteria, while tied contacts are constraint-based and do not allow for failure.
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