Analysis on Nonlinearity of a Strain Gaged Load Cell

摘要

Elastic element is a crucial part of a strain gage load cell, which decides load cell's nonlinearbasically. Usually we realize it's nonlinear by testing. According as solid mechanics principle, equilibrium equations, deformation equations and constitutive equations are applied to describe elastic element's mechanics performance. In this article, we discuss each equation individually to see which would make nonlinear performance in load cell. We also discuss these affection factors in certain load cell and to see how to reduce these affections. With proper boundary condition considered, we can do nonlinear analysis with FEA in principle when we are designing elastic elements. It'll be helpful to reduce develop time.