Learning Forum

[Aymen]

I'm trying to model an adhesive joint between a shell (mid-surface with offset = middle) and a solid using Cohesive Zone Modeling (CZM) in Ansys. The mid-surface offset creates a 0.5 mm artificial gap (half the sheet thickness), which disrupts the cohesive behavior, since my CZM has no actual thickness. I need to preserve the shell thickness effect for correct bending, but I still want the CZM to work realistically. How can I define the shell–solid contact so the cohesive behavior activates properly under this condition?

[Ashish Khemka]

Hi,

I assume your query is answered over her: CZM contact setup between solid and shell elements in Mechanical

Regards,

Ashish Khemka

[JohnGantz999]

@Solitaired Before running the simulation, use “Initial Information” > “Gap” to check the gap. If there is a ~0.5mm gap as you say, create a "Contact Offset" to compensate for this gap exactly. Or, use a larger "Pinball Region" to ensure contact is detected and CZM is activated.