- #1

mertcan

- 345

- 6

Hi, I would like to ask why center of element displacement is always estimated with polynomial equation involving nodes displacement (like in attachment/picture)? Also I know that if nodes' number increase for an element then displacement of center of element is estimated with higher order polynomial, why do we always include polynomial equation to estimate center of element?? why don't we use logarithmic or exponential function or other kind of function to model the displacement of center of element?? Does the application of polynomial equation to estimate the displacement of center of element give better real results ?? if it gives then why ??