modeling of a compound like calcium carbonate

[maisir666]

hi again.. thanks for replying to me. im doin some work on a quarter of a steel cylinder with calcium carbonate precipitate formed on the inner wall of the steel cylinder. i need to apply a 200micrometer diameter water spray on the precipitates, at about 10MPa. i have been able to modelt eh steel cylinder. but the precipitate, i havent been able to figure out what material model i can use in it, if i want to know the stresses and the deformations the precipitates will encounter because of the high pressure water spray. thank you.