City Research Online

Abstract

Mathematical models have been developed and applied to the analysis and design of snap-action diaphragms that can be considered axi-symmetric. An efficient finite element formulation based on axi-symmetric thin shell theory and employing two noded line elements has been produced for studying these unstable devices. The
finite element model was validated by comparison with experimental results on a number of diaphragms, for both pressure loadings and point loadings.

A systematic study of two types of snap-action diaphragms (conical and spherical) has been conducted using the finite element model. Non-dimensional design curves have been produced for conical diaphragms and from these a design methodology has been developed. This methodology does not require the use of a computer but it is based on the computer generated design curves.

Publication Type:	Thesis (Doctoral)
Subjects:	Q Science > QA Mathematics T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology > Department of Engineering School of Science & Technology > School of Science & Technology Doctoral Theses Doctoral Theses

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