compressive stress allowables

sharjeelfaiz · **Joined:** Mon Oct 15, 2007 6:54 am **Posts:** 128

Hello.

Why Joint efficiencies do not apply to compressive stress allowables stresses?

Thanks. Appreciate it.

srinivasan · **Joined:** Tue Jan 27, 2009 6:33 am **Posts:** 79

Because stresses are compressive !

Welds are subjected to compressive rather than tensile and are expected to fail under tensile stresses

sharjeelfaiz · **Joined:** Mon Oct 15, 2007 6:54 am **Posts:** 128

UG-23 (b) says that the joint efficiency for butt welded joints shall be taken as unity.

Sharjeel

srinivasan · **Joined:** Tue Jan 27, 2009 6:33 am **Posts:** 79

Yes ; UG-23(b) is for axial compressive allowable stress; weld joint efficiency is to account for failure of weld under tensile stress;
Hence weld joint efficiency =1 for welds under compession

Am I clear ?

With regards

compressive stress allowables

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