Hi everybody
in my simulation i want to impact a cortical bone with a hammer, the only things that i have for the bone are these: elasticity module, density and Poisson's ratio and g=01324 and tau= 115. i know it is a time dependant viscoelastic material. when i go to the viscoelastic part in definition of material i select prony series. but the problem is that abaqus gives me error for coeffitions. it says the sum of coefficient must be lower than one. but my bulk module is something about 175000
now please someone tell me how can i solve my problem to define a viscoelastic material in abaqus using these properties????
thanks
Actually, in ABAQUS, it is relative modulus. That is all Gi values are normalized with respect to G_initial. Therefore, their sum cannot be more than 1.0. Otherwise, the fitted data will yield higher modulus than the experiment. So, normalize all the Gi values wrt the initial modulus. It should be less than 1.0. So, please let me know if you need further clarification.
- Badges
- Science topic