6. Measurement and Data Analysis
Porosity calculation:
By considering the sample of total volume as Vt. Defining the solid phase to be of volume Vs, and the volume of the pore phase (the holes) to be Vp, with Vt = Vs + Vp. The volume fraction of the pore phase or porosity is denoted by φ = Vp/Vt. The solid volume fraction is then 1 - φ.\cite{GARBOCZI19991}
By assuming these values, (assumptions were made from the average pore size and that of the solid modelling analysis)
Volume in solid phase (Vs) is 24102.88 mm3
Volume in pore phase (Vp) is 16068.5 mm3
Using the above defined information, the porosity is calculated to be φ = 0.66
Passive actuation mode: