Good Day, Would someone have an idea on how to dervie the Young's Modulus of elasticity for anisotropic materials, I am using Quartz? I found an equation for Young's Modulus from a book but when I use the value to find the theoretical resonant frequenices the percentage of error as compared to the experimental is huge. Basically I am using a Quartz Tuning Fork (QTF) and I have modelled the tines as a cantilever, because the length is much larger than the width or the thickness. I also modelled the QTF in Ansys and got a better approximation of resonant frequenices as compared to the experimental values. Thank you and with kind regards, Abhi