Abstract

NOA-AGUILA, Juan Gabriel; QUIZA-SARDINAS, Ramón  and  MONTELIER-HERNANDEZ, Sergio. Simulation of the stress state of the backing plate in a diaphragm pump. Ingeniería Mecánica [online]. 2023, vol.26, n.3, pp. 54-59.  Epub Feb 10, 2024. ISSN 1815-5944.

Analytical determination of stress distribution in a backing plate of a diaphragm pump, has a high complexity level, due not only to its geometric characteristics but also to the acting loads. In this work, the finite element method was used to carry out a simulation at this problem, allowing to obtain a solution that, although approximate, is accurate enough for being used for practical applications. In the simulation, the plate curvature, holes space distribution with the corresponding stress concentrations, and the force effect in the fluid and the diaphragm. The outcome was the stress distribution in the whole geometric domain of the part. In all the cases, the obtained results qualitatively matched to those expected from basis of the theory of elasticity. The obtained outcomes were validated by comparing the higher stress region achieved through the simulation and that where the part breakage actually took place. An excellent matching of both regions was observed. The used approach can be also being use in the future, for optimizing the design of these backing plate.

Keywords : diaphragm pump; holed curved plate; finite element analysis; stress state.

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