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編輯 編輯 看到有這樣解釋的：對稱平面選項，決定當單元表面失效時沿一個表面是否仍然保持對稱性也有這樣解釋的： 但是還是不清楚選用這個的作用以及對結果會有什么影響

abaqus 中當使用 硬接觸 功能中的 Allow separation after contact（不勾選）時，出現下列警告，請教下要怎么解決At least one non-blank surface must be specified for contact surface interactions referencing NO SEPARATION surface behavior

Initial contact adjustments for resolving gaps and overclosures when a surface with double-sided facets is paired with any surface having double-sided facets may be incorrect.

cohesive性質用general contact和surface to surface（explicit）都報錯，surface base cohesive contact只能用于bonded contact？

THIS MAY BE DUE TO NONEXISTENT SLAVE OR MASTER SURFACE, OR DUE TO ERRORS WHEN PROCESSING THE *CONTACT PAIR KEYWORD我明明定義了slave surface 和 master surface。

The same pair of surfaces cannot be specified more than once for *tie and *contact pair.

Please remove the contact field output for the contact pair in question, or split the node-based surface into separate surfaces each spanning just one instance

THE SLAVE SURFACES ASSEMBLY_GROUTING-1_G1-I AND ASSEMBLY_GROUTING-1_G2-I INTERSECT EACH OTHER.

但*CONTACT_AUTOMATIC好像只作用在表面，出現彈體單元刪除時，彈體內部的單元接觸失效。1.梁單元如何使用*CONTACT_ERODING的關鍵字呀？2.*CONTACT_AUTOMATIC_BEAMS_TO_SURFACE關鍵字如何實現侵蝕接觸類似的效果？求助呀

forces are available only for the master side with node to surface contact types of interface # 4 input of data is completed initial kinetic energy = 0.14923890E+08 The LS-DYNA time step size should not

彈體侵徹鋼筋混凝土時，鋼筋采用梁單元建模，與混凝土進行不共節點設置，彈和鋼筋接觸采用的是CONTACT_AUTOMATIC_BEAMS_TO_SURFACE，彈和混凝土接觸為CONTACT_ERODING_SURFACE_TO_SURFACE，跑第一幀就出現了大量刪除如下，求解答

利用dyna模擬物體碰撞雙層板，已經對碰撞區域網格加密，雙層板之間采用CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_TIEBREAK，物體和板采用CONTACT_AUTOMATIC_SURFACE_TO_SURFACE，但是雙層板之間出現了明顯的穿透并且物體與第二層板也出現了穿透，請問有什么方法解決。