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Design value for linearized stress results...?

Newbie

Design value for linearized stress results...?

Does anyone have any experience from standards like ASME or similar, etc where linearized stress results are used for dimensioning?

I have no problem understanding the linearized stress query, but how is this result used for dimensioning?

I recall that it is common in pressure vessel design and possibly other design situations. What is the design value for the linearized stress result, and how is this justified? Can reference be made to ASME (for example) for an arbitrary product that is not required to be approved according to a standard? In my case it is a sheet steel bracket that holds a component in a vehicle.

I'm working on a shell model, where I obviously cannot do elastoplastic analysis, with some very small regions exceeding the yield stress. If the high stress area is sufficiently small, then the linearized stress will be considerably lower than the peak stress, and then it should (I guess?) be OK to use the linearized stress for dimensioning.

Can anyone confirm this?

What should the design value be, for the linearized stress?

How is this justified? What standard (ASME-xyz?) should I refer to?

I would be most grateful for any feedback.

/Mats L/

1 REPLY 1

Re: Design value for linearized stress results...?

Creo Simulate uses the stress linearization procedure described in section 5.A.4.1.2 of the 2010 ASME Boiler and Pressure Vessel Code, VIII Division 2, Alternative Rules, Rules for Construction of Pressure Vessels

http://help.ptc.com/creo_hc/creo30_pma_hc/usascii/index.html#page/pma/simulate/resltstr/show/referen...

http://help.ptc.com/creo_hc/creo30_pma_hc/usascii/index.html#page/pma/simulate/resltstr/show/referen...

https://support.ptc.com/appserver/cs/view/solution.jsp?n=31503

https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS64848

Use Creo Simulate 3.0 - for ease of use.