Abaqus cohesive and gasket elements are special-purpose interface elements for finite-thickness or zero-thickness layers whose response is dominated by separation, compression, sealing, or interface damage.
How They Work
Cohesive elements can use a continuum approach or a traction-separation description. They support two-dimensional, three-dimensional, axisymmetric, and pore-pressure variants, and they often work together with damage initiation and damage evolution laws.
Gasket elements represent sealing layers whose through-thickness compressive response is central. They can use material-based gasket behavior or directly specified gasket behavior, with two-dimensional, three-dimensional, and axisymmetric libraries.
Why It Matters
These elements bridge contact, fracture, and material modeling. They are appropriate when an interface has its own constitutive thickness or degradation law, rather than being only a surface constraint.
김경종