Ceramics FEA
Ceramics FEA
(OP)
Hello all,
I am modeling an assembly containing some ceramic components and some titanium - basically a ceramics sandwich. Unfortunately I am not sure which material properties are key for the modeling of the ceramics. I have the basics: Young's modulus, density, Poisson's ratio - but I am not sure what to put for the Tensile limit.
Does anybody have an familiarity with performing FEA analysis on ceramics? I know that there is very little stress shielding, so minor concentrations can lead directly to failure, but what should I be focusing on with this analysis - Principal stress?
For reference, I am using NeiWorks in conjuction with SolidWorks and Nastran.
I am modeling an assembly containing some ceramic components and some titanium - basically a ceramics sandwich. Unfortunately I am not sure which material properties are key for the modeling of the ceramics. I have the basics: Young's modulus, density, Poisson's ratio - but I am not sure what to put for the Tensile limit.
Does anybody have an familiarity with performing FEA analysis on ceramics? I know that there is very little stress shielding, so minor concentrations can lead directly to failure, but what should I be focusing on with this analysis - Principal stress?
For reference, I am using NeiWorks in conjuction with SolidWorks and Nastran.





RE: Ceramics FEA
The space shuttle tiles have been modelled many ways, one of the most successful techniques uses a statistical model built into the FEA, to show effects of "real world" property variations. Many, many cases are then run to generate a statistical map of low-margin areas or load conditions that may need more work or tighter inspections, etc. etc.
RE: Ceramics FEA
I had been advised to study up on Weibull modulus as the statistical nature of ceramic strength was mentioned. What should be varied during the different cases? A minor change in the load intensity or direction?