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Example 3 – Coining (5)
Bilateral, 2 x 2
GDV “B”, v = 300
Unilateral, 2 x 2
GDV “B”, v = 300
Bilateral,
Plane strain (COIN05)
Unilateral,
Axisymmetric (COIN25)
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Non-conforming FSI
• The FSI algorithms presented so far assumed
nodal conformity of F-S interface
• This choice is justified (not too penalizing) in
the majority of practical applications, because:
‣ Linear-velocity, uniform-pressure elements used for the fluid
‣ Zero-thickness shells linearly interpolated along membrane
‣ External pressure on shells element-wise uniform
‣ Conformity ensures maximum simplicity and optimal accuracy
• However, the conformity requirement may be removed to obtain an
even more general treatment of permanent FSI, which may be very
useful in specific advanced applications
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