non-traction resistant material

[narra12]

hello to all, in ansys workbench I would like to define a material that has a perfectly plastic elastic behavior not resistant to traction, someone knows how to do? the bilinear I think I can define it, but I don't know how to make the program understand that my material must not resist traction.
Thank you.

 

[Stan9411]

You want his tensile strength to be zero? I don't think you can do it. It doesn't make sense at all points of view .. rather give it a very low and see how it behaves

 

[narra12]

Thanks for the answer. However I am analyzing a masonry building; In this type of material tensile strength is very small, therefore, it is common practice to neglect it by reasoning in favor of safety.
I'm fine though if I can define a material that has a very low tensile strength.
I would like to be sure that the parameters I set in workbench are the right ones for what I want to do. by referencing the image below, is it right as setting? material with bilinear behaviour with very low tensile strength?

 

[Onda]

It seems to me that there is confusion between the elastic behavior and the resistance of a material and therefore the breakup. a bilinear material has an elastic behavior so, passing a deformation threshold, changes elastic module. if the module that you put for the plastic part is close to zero, as it seems from the posted image, you can consider that part of material does not transfer more load and therefore it is broken. Indeed, however, the material still has the load part that brought it to the plastic phase, so, it is not equivalent to a break, but only an incorrect approximation.

There is, however, a procedure in ansys to make a suppression of the element if this exceeds a certain threshold of load, it is called element death. I think it is closer to what you want to do, even if perhaps more complicated.
you can take a look at this site, but it is a function that exists for many years.. so I imagine you find many explanations:https://www.simutechgroup.com/tips-...339-fea-tips-tricks-ansys-ekill-element-death I haven't been using ansys for many years, so I don't know how to explain more, but I think that this is very good for your case, because in case of breaking the masonry in traction you must have the redistribution of the load to the contiguous elements. .