In an assembly including multiple components, the interactions between components are defined by contacts.

Contacts can be divided into two types: Linear contacts and non-linear contacts. Bonded contacts and non-separation contacts are linear contacts.

Linear contacts are widely used to define the contact between two adjacent components that have no relative movement. A sliding contact where friction is ignored also a linear contact. Linear contacts enable FE solutions to be more easily obtained.

Contacts allowing separation (e.g. frictional contacts) are non-linear contacts. For FE models with non-linear contacts, an iterative process is involved to obtain a solution and therefore non-linear contact analyses are more computationally demanding.

Defining suitable contact types is important in setting up the analysis model for an assembly. Non-linear contact analysis in large 3D assemblies can be difficult. A balance needs to be made between the effort of simulating realistic contacts and the feasibility of obtaining a converged solution.

TriVista provides FEA consulting services and has a lot of experience in stress analysis of large assemblies. If you would like to know more please feel free to call or email (contact details below). Our experienced engineers will be happy to help you. Alternatively, you may prefer to use our simple enquiry form.