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Experimental data showing effect of stress state

anuradha's picture

While there is a lot of experimental literature available on the effects of stress-state on ductile failure under monotonic loading, corresponding studies on fatigue mostly involves bending and torsion type of combination loading. Unfortunately, such a loading corresponds to one of the principal stresses being negative and therefore not as critical. We could find only two references which show clear effect of biaxial state of stress in a pressurised cylinder subject to additional axial load (Biaxial-tension fatigue of inconel 718, it is a report in UIUC 1989). I was wondering if we are missing out on something because it seems such an obvious line of investigation inspite of the difficulties involved in bi-axial fatigue testing of metals.

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BIKASH's picture

Hi Mam,

I am a reserch scholar, from IIT in India. I am working in the area of improvement of productivity of Inconel 718 products as its finds a very wide domain of application inculding Aerodyamics, Marine, Defence etc.

If possible, Please provide the information pertaining to Inconel 718.

Expecting a postive and earliest response.

Thanking you.

B.C.Behera

Mail- bikash.nitr@gmail.com 

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