Can superelastic materials be crushed?
Thread Content
I designed a container that needs to be sealed; after selecting the appropriate sealing method, I conducted ANSYS analysis and found that the stress on the seal was very high. The seals are made of polyurethane and nitrile rubber, both of which are superelastic sealing materials; that is, their Poisson’s ratio is close to 0.5, and they are considered incompressible materials that only deform without a change in volume before and after deformation, and can return to their original shape once the load is removed. So, can incompressible materials be crushed? In other words, will high stress cause crushing? Because I was only able to find the tensile strength of the material, not its compressive strength. I hope those who know more can help and answer my questions; please. .
Even rubber bands can be broken; let alone polyurethane and nitrile rubber – they will get damaged once the limit is exceeded! Just like the rubber seals we use frequently, they will age and deform over time when used under certain conditions and for an extended period!
You’re right; it will break under tension, as it has a tensile strength. However, for superelastic materials, their compressive strength isn’t available, and no one knows what it is. That’s why I want to know whether such superelastic materials can indeed withstand high compressive stresses Or where can one find out its compressive strength?