surface-to-surface contact elements are used to model contact between two surfaces. eg. two blocks moving relative to each other, contact between two concentric cylinders, contact between car and road etc.
Node-to-surface contact elements are used to model contact between a surface and a point for eg a sharp object like a pin or bullet impacting a plate, membrane etc . For further details you shall refer to the manual.
Well. You can do like that. But I prefer to reverse the master and slave surfaces as elastic surface has larger area. You can try both the option and choose the one which performs better.
This is similar as in ANSYS, any point load on a surface can be modelled as node-to-surface contact. And Area contacting an area as in indentation can be modelled using surface-to-surface contact.
I always take the node to be contact and surface to be target. Or the deforming body to be target and the rigid (depends what you refer rigid to be) to be the contact.
NTS contact is by definition is Node To Surface contact. It can be used only for linear meshes when the Node is a Slave Node and is projected to the Master Surface. STS algorithm in literature can be in various types described 1) as an integration point projection from the Slave Surface 2) as a specific slave point projection (center of area etc) Depending on this one can find various Mortar methods. We describe this in details in our Introduction course
http://eu.wiley.com/WileyCDA/WileyTitle/productCd-111877065X,subjectCd-MA80.html
for more information is in the research monograph
http://link.springer.com/book/10.1007%2F978-3-642-31531-2
Hi, When you have two smooth surfaces, there is no problem in going for Master to Master approach. In fact if you have well represented geometries, then surface to surface contact yields better results. If you have the slave surface as non-smooth (ups and downs, crests and troughs), in such cases, Node to Surface approach holds good.
STS is enforced over a region nearby the slave node rather than at individual nodes as in the STN approach. This larger region consideration makes STS costlier. Surface to Surface defines contact between the entire master surface and the entire slave surface. Surface to Node defines contact between entire master and each slave node. Since surface regions are considered in the STS approach, penetration will not be easy. But penetration is easy in STN approach.
When you are establishing contact between two rigid bodies, if the slave is a discrete rigid and if the master is an analytical rigid, STN is more feasible.
I think this link can be useful.
http://bobcat.nus.edu.sg:2080/English/SIMACAEITNRefMap/simaitn-c-contactpairform.htm
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