AbstractContact analysis is a major concern in many applications such as metal forming, projectile impact, electrical relay, and addresses often multi-field effects (thermal, electromagnetic). Due to the nonlinearity and difficulty in predicting the behaviour of the bodies coming into and go out of contact, we need software able to simulate a structural contact problem and couple it with other physics. The last version 3.3 of COMSOL Multiphysics allows the analysis of multiphysics contact problem and appears to be interesting. Being new and under development, COMSOL 3.3 needs therefore to be validated in terms of contact modeling. Only the cases of frictionless problem are considered. A static contact Hertz model and a model containing a rigid-flexible contact and a flexible-flexible contact are studied and describe the capabilities, advantages, originalities and drawbacks of COMSOL. A good user interface and the capabilities to couple all physics with facilities make attractive the software.
See the COMSOL Reference Manual for a full list and syntax. In this blog post, we have discussed how to add conditions that stop a time-dependent or parametric solver when one or more criterion is met. If you have any questions related to this topic or using COMSOL Multiphysics, contact us via the button below. Instead, you need to allow a non-zero slip velocity and to add a frictional force at the wall. With such a boundary condition, it is possible to explicitly set the contact angle, that is, the angle between the fluid interface and the wall.
However, contact algorithm implemented in COMSOL doesn’t allow the resolution of all contact problems. The more evident, like a Hertz contact can be solved efficiently with a reduced computational time.
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A problem containing an initial gap between two deformable surfaces requires more computational costs and solver fails to find a solution easily. The user has to spend enough time to set up the contact parameters. But it isn’t always evident to check these parameters to optimise the solution accuracy and the time of resolution. More investments have to be provided to improve the contact algorithms and to facilitate the user to choose the contact parameters.
Choose and Add Physics- Default Nodes Review- Define the Physics- Overrides and Contributions- Video TakeawaysIn COMSOL Multiphysics®, the process of defining the physics for your simulation is simple. You can easily determine the physics that you want to include, apply boundary conditions to a model's geometry, and specify values. For any application area, the software has a number of physics interfaces available, which you can add to your simulation.In this video, we use the thermal bracket example model (found here: ) to show you how to add a physics interface to a model in COMSOL Multiphysics®. We also review and discuss some of the features contained within the physics nodes that you can use when defining the physics.