You may know that SOLIDWORKS just launched a new product on the 3DEXPERIENCE Platform: Structural Professional Engineer. What is Structural Professional Engineer? It is a Finite Element Analysis or structural analysis software application powered by Abaqus, the best non-linear solver on the market. Structural Professional Engineer expands SOLIDWORKS Simulation capabilities to more advanced nonlinear solutions: large deformation & large strain, robust contact, a wide range of non-linear material models, quad and hex meshing and cloud computing. Among many exciting features about this product, one of my favorites is General Contact.
General Contact allows users to define contact between all or multiple regions of a model. The software recognizes those components that mate as a single interaction where anything can hit anything. As a result, it will automatically determine and enforce contact compatibility between components.
Figure 1 illustrates how the interaction between 3 parts are treated as a single contact domain.
Fig 1. General Contact (everything is treated in 1 domain)
Figure 2 shows General Contact being automatically created when model is imported from SOLIDWORKS into Structural Professional Engineer. All contact pairs between components are treated as one single contact domain.
Fig 2. General Contact is the default Contact Algorithm in Structural Professional Engineer
By contrast, without General contact, you would need to define multiple Contact Pairs to specify what would hit and where as illustrated in Figure 3.
Fig 3. Contact Pair is the alternate method (define 6 contact pairs)
Figure 4 shows a Contact Pair being generated using the Contact Pair method between the top metal plate and the rubber bumper. For this simulation model, we will need to define a Contact Pair between the bottom plate and the rubber bumper and other Contact Pairs to include all surfaces of the rubber part that will self-contact with each other as illustrated in Figure 3.
Fig 4. Contact Pair between top plate and rubber part
General Contact is an efficient way to get the software to find and determine where contact occurs. General Contact will save you a ton of time, especially when working with models that have many complex contacts.
Another benefit is it will increase the accuracy of your model. This is particularly helpful when models are going through large deformation, large strain or when they are self-contacting.
An example of self-contact is shown in Figure 5 where, using General Contact, users don’t have to predict, select and organize which surfaces will come into contact with any other surfaces before running the analysis.
Fig 5. Von Mises stress plot of the rubber bumper model
General Contact in Structural Professional Engineer allows for a highly automated contact definition, which makes users much more productive. However, there is often a trade-off between ease of defining contact and analysis performance.
To find out more about Structural Professional Engineer click here!