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Design of welded vacuum chamber subjuect to random vibrations

Design of welded vacuum chamber subjuect to random vibrations

Design of welded vacuum chamber subjuect to random vibrations

(OP)
Hello,

in my company we have designed and manufactured a stainless steel vacuum chamber needed to perform a vibration test of an item under vacuum conditions. When performing random vibrations at full level, after some time, the weld on the chamber base broke on 180° circumference. What can I refer to for correct sizing of this weld?

Thanks

Marco

RE: Design of welded vacuum chamber subjuect to random vibrations

It was a fillet weld wasn't it?

RE: Design of welded vacuum chamber subjuect to random vibrations

(OP)
Yes, continuous fillet weld.

RE: Design of welded vacuum chamber subjuect to random vibrations

Fillet welds perform poorly in fatigue because they essentially build a crack into the design.

For fatigue applications full-penetration welds are better.  

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