Residual stresses in thick walled cylinders (autofrettage)]

[azzamut]

Homework Statement

1. from a design engineers point of view identify consisely the relative meris of the emperical TRESCA and VON MISES approaches as applied to open ended thick walled cylinders.

Hence specify with reasons what you believe to be the most appropriate approach.

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2. Discuss factors which can cause recovery to be non elastic. In qualititive terms what effects might such anelasticity have upon the residual stress distributions


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3. List and discuss the main benefits of the autofrettage process as applied to thick walled cylinders.



Ans...

1.

2.

3. Tensile stresses are lower at the bore

 

[Gokul43201]

You've just written out the question. We can't help you until you also show some effort towards answering it. Please read the forum guidelines.

 

[azzamut]

thats because I am stuck with these questions! some advise please of where to start

 

[azzamut]

anyone

 

[Gokul43201]

What does your text/notes have to say about the Tresca and von Mises criteria? Which is better suited to more ductile materials? Which is more conservative? Which one is better suited to linear structures, and which one to shells? What is the relevance of the open ends? Does that make any difference to the choice of failure criterion?