FEM And BEM Analysis Of Structural Welds
For Design Certification Purposes
Author(s)
R. E. Dippery & J. P. Leiva
Abstract
Many designs require the entire design or portions of the design to be certified
by a registered professional engineer. Certification may involve a review of the
design and calculations supporting the design; or reviewing the design and
performing calculations necessary to evaluate the design. The analysis portion
of the design may involve the use of handbooks such as Roark’s Formulas for
Stress and Strain [1], Marks’ Handbook for Mechanical Engineers [2], Machine
Design Databook [3], machine design textbooks [4,5], and/or boundary element
method (BEM) or finite element method (FEM) codes. Other designs, such as
the one considered by this paper, require an in-depth analysis of load distribution
to evaluate weld stresses plus weld integrity (cyclic life, for example), a task not
always practical using the previously mentioned methods. In the design
considered in this paper, the analysis initially consisted of determining the
maximum load for a given weld, comparing it to the maximum load applied to
the device). GENESIS [6] has been used to generate stresses in the different
welds. These stresses are being used in BEASY [7] models to assess the
durability of the design, and recommend design improvements as required. This
paper discusses the process developed for a particular design, and the application
of the technique to a second design requiring certification.
1 Introduction
Welded structures are very common. Design of welded joints can be found in jet
engine and gas turbine casings and frames, nuclear reactor vessels and
components, pressure vessels, chemical storage tanks, boilers, buildings, bridges,
Keywords
Related Book
Other papers in this volume
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