The glue material between two laminas is modeled by using traction-separation-based interface elements.

An interface element based on the cohesive zone model is employed to simulate the fiber/matrix interface in composite.

The model includes a special interface element, which is used to simulate the thin epoxy adhesive layer of the plate-bonded beam and which allows for the peel failure at the plate cut-off zone and or in the vicinity of flexure and shear cracks.

Based on the idea of interface damage mechanics,a new type of interface elements with three nodes was proposed.

Furthermore,two types of interface elements,spring interface elements and six noded interface elements, which are developed by the present author and can be used to p.

In order to validate the precision of this method and to analyze the influence factors of global stress distributions,strength analysis of a simply supported beam was adopted firstly by this method,and then compared with traditional degrees of freedom(DOFs) coupling,an interface element method and theoretical solutions.

To deal with the problem of heat resistance between cast and casting moldintrface, a kind of fictitious interface elements method is created and formulas related are also given.