A comparative approach for the characterization of a pneumatic piston gauge up to 8 MPa using finite element calculations

Abstract

This paper reports the behavior of a well-characterized pneumatic piston gauge in the pressure range up to 8 MPa through simulation using finite element method (FEM). Experimentally, the effective area of this piston gauge has been estimated by cross-floating to obtain A 0 and λ. The FEM technique addresses this problem through simulation and optimization with standard commercial software (ANSYS) where the material properties of the piston and cylinder, dimensional measurements, etc are used as the input parameters. The simulation provides the effective area A p as a function of pressure in the free deformation mode. From these data, one can estimate A p versus pressure and thereby A o and λ. Further, we have carried out a similar theoretical calculation of A p using the conventional method involving the Dadson's as well as Johnson-Newhall equations. A comparison of these results with the experimental results has been carried out.

Evaluation of effective area of air piston gauge with limitations in piston–cylinder dimension measurements

“…Many reports have been published on the calculation of the effective area dimensionally and calculated the uncertainty using MCM and LPU. However, none of them compared the values of effective area and uncertainty calculated from the dimensional, MCM, and LPU methods [7,[25][26][27][28][29]. After the invention of MCM, metrology scientists and many industries as well have been using MCM to calculate the uncertainty [25,30].…”