Pure Mathematics

Pressure Vessel Design: The Direct Route by Josef L Zeman, Franz Rauscher, Sebastian Schindler

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By Josef L Zeman, Franz Rauscher, Sebastian Schindler

This booklet explores a brand new, economically potential method of strain vessel layout, incorporated within the (harmonized) commonplace EN 13445 (for unfired strain vessels) and in accordance with linear in addition to non-linear Finite aspect analyses. it really is meant as a helping reference of this standard’s path, supplying history info at the underlying rules, uncomplicated rules, presuppositions, and new notions. Examples are incorporated to familiarize readers with this method, to spotlight difficulties and ideas, benefits and drawbacks.

* the one publication with heritage details at the direct path in strain vessel layout.
* includes many labored examples, helping figures and tables and a accomplished word list of phrases.

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Additional info for Pressure Vessel Design: The Direct Route

Example text

To avoid confusion with discontinuity in the mathematical sense, the term local structural perturbation source is used here throughout. Stress-concentration-free models: A stress-concentration-free model of a structure is an equivalent idealized model of the structure without local stress/strain raisers (EN 13445-3 Annex B). qxd 18 4/26/2006 5:29 PM Page 18 Pressure Vessel Design: The Direct Route A stress-concentration-free model of a structure, or of a more refined model, is an equivalent idealized model of the structure, or of the model, without local structural perturbation sources but with all other aspects of the models being the same.

Of course, total stress or strain in the model investigated may always be used instead of the extrapolated values, with the total stress or strain being determined by the software’s solution procedure in the hot spot, or by extrapolation into the hot spot within the element, or total stress or strain in the element integration points. The extrapolation line is not specified in the standard, only the distances of the pivot points are. Depending on the design check, the related failure mode may be crack initiation or crack propagation of an existing crack.

To each load case there corresponds one load case specification. All characteristic values listed in one load case specification are considered to be possibly attained coincidently, and coincidently with values of the listed characteristic functions at any time. The partial safety factors used should be specified and included in the load case specification. Whenever the choice follows uniquely from the specification of partial safety factors in EN 13445-3 Annex B, a simple reference to this Annex B suffices.

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