This paper that may help you is here on RG:

International Journal of Applied Mechanics Vol. 2, No. 3 (2010) 681–697
c Imperial College Press DOI: 10.1142/S1758825110000718

EFFECTS OF BALLOON LENGTH AND COMPLIANCE ON VASCULAR STENT EXPANSION F. S. CUI∗,¶, H. P. LEE†, C. LU‡ and P. CHAI§

The von Mises stress is an invariant of the stress tensor, related to the deviatoric part of stress (in contrast to hydrostatic stress of the bulk). If you dop an object in deep water for example, the hydrostatic stress will increase, but the von Mises stress will be zero. Von Mises stress is mainly used to check for yielding of ductile metals. I don't know if von Mises stress is a suitable measure to evaluate the state of artery tissue, but if it is then it can only be interpreted in relation to some limit values. The limit values need to be looked up in a text book or evaluated by experiments.

From the well-known solution for elastic tube under inner pressure it turns out that systolic and diastolic arterial pressures relate as corresponding von Mises values (90:138). If these pressures are unknown, they can be easily found using Poisson's ratio, thickness, and inner radius of the tube (in this case the stresses does not depend on Young's modulus).

Victor J. Аdlucky Johannes A. J. Huber Béatrice Marianne Ewalds-Kvist Thank you al,

Thanks for your well information's but what i would like to say here that,

I got less than 0.2% stresses for input young's modulus of 1MPa.

Now, the results of Von-mises stresses i am getting of maximum of 1385Pa which is less than of 0.2% of value of young's modulus (1MPa). Generally, that define the elastic regions (0.2%) from stress strain curve so by these values can we conclude that, material can withstand and do not yield for given inlet pressure (velocity) and young's modulus values??

It is very simple to calculate also, instead we go for any other failure theories.

Thank you in advance,

Regards