It's not clear what type of experiment you are conducting and what exactly you mean by "deflection against time graph". However, assuming that you are conducting a mechanical experiment and have a graph of the deflection of a material specimen under a constant load as a function of time, you may be able to estimate the Norton's creep parameters using the following steps:

Note that the Norton's creep law is just one of several models that can be used to describe creep behavior, and its applicability may depend on the specific material and loading conditions in your experiment.

Febin Cherian John, thank you so much for your response...

The timber I am using is from a shipwreck which was submerged for 500 years. The aim is to get the ship on display in a museum now that the conservation treatment has been finished.

All my experiment involves is seeing how it deforms under self-weight, with the aim of estimating the material properties. This will be done by editing the known material properties for oak.

All I have are the periodic deflection results. Is there anything that you can recommend doing with ANSYS in order to find these properties?

Thanks again in Advance.

To estimate the material properties of the timber from the shipwreck, you can use ANSYS to simulate the deformation of the timber under self-weight and compare it to your experimental results. Here are the steps you can follow:

Note that estimating material properties from periodic deflection results can be challenging, and there may be other factors that can affect the deformation of the timber, such as moisture content and decay. Therefore, it is important to carefully consider the limitations of your experimental setup and the assumptions made in the ANSYS simulation.