Dear Dr Sailesh,

I am attaching a publication about diffusion bonding with few assumptions that need to be considered. Hope this will pretty much helping you in your quest. All the best then.

Hi

I'm not sure how does it work in ANSYS, but generally there should be defined a pair at the contact surface or contact elements. To define your initial or full bond force, the force per area should be defined along the two main directions of the surface (shearing forces) and the normal direction, (or the stiffness, if mechanical connection is used by any means). In the second step, you can reduce this force (or any of its components) by 70%.

In COMSOL for example, it can be solved explicitly as discussed above by defining a thin elastic layer using the Solid Mechanics Interface.

Regards

Not aware of ANSYS

but if there is any option of normal stiffness and shear stiffness of interface/bond strength

provide the reduced values by same factor you want

in some analysis softwares, bond/interface strength is defined in terms of friction cohesion dilation tension and normal stiffness and shear stiffness values.

you reduce accordingly !!

You can control the contact stiffness which will directly affect the bond in ansys by inserting a command block as follows

RMODIFCID,3,-500 !normal stiffness "Check your unit System"

RMODIF,CID,12,-500 !Tangential stiffness "Check your unit System"