Materials used in steel structures are increasingly
becoming thicker and heavier. A greater
chance of cracking during welding of beams
to columns, for example, has resulted due to
increased thickness of material. With weld
shrinkage restrained in the thickness, width,
and length, triaxial stresses develop that may
inhibit the ability of steel to exhibit ductility.
This paper will attempt to explain why these
cracks may occur, and what can be done to
prevent them, by expanding on information
presented in the AISC Supplement No. 1
(LRFD) or Chapter J 9th Ed. AISC Manual.
The corresponding maximum shear stress is at
the top of each circle. For convenience, each
point of shear (illustrated as a solid dot) is moved
horizontally until it lies directly above the corresponding
tensile stress (depicted as an open
dot). Notice that these points form a straight line,
representing a simple tensile specimen. From
this line, it is possible to read off the maximum
shear stress for a given tensile stress. This is
the basic figure used by Professor Gensamer,
as shown in Figure 3.
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