I have a valve with a stream purged stuffing box that is designed and rated for 50 psi, and the maximum purge pressure is 100 psi. Is there a code exemption for the purge pressure being that the flow rate of the purge is insignificant to the flow rate of the valve - like a drop in the ocean...
I want to create a MathCad sheet that has an image with inputs on top representing dimensions. This is only to visually assist the user, so correct variables are inserted. Any ideas how to do this?
Can anyone guide me toward where I can find stress/strain curves for SA516 gr 70 at elevated temperatures? I am working on a non-linear analysis and need these properties. Thanks in advance.
Can anyone give me any tips on importing plate models into autodesk mechanical simulation 2012. I have been drawing models in autocad 3d because simulation will not accept inventor assemblies. I have had some luck when converting to .sat files, but none with .iges or .step. I usually get a...
I am running a nonlinear analysis of a stainless steel structure at 1450 F, and need some guidance (I am new to nonlinear FEA). The design is governed by the ASME allowable stress which is lower than the yield stress; so my stress concentrations after the nonlinear analysis are lower than the...
When designing for fatigue life of a pressure vessel at high temperatures, should the allowable be taken from API 530 or from ASME section 2 part D? I have seen this done both ways. In some situations I have seen Larson-Miller calculations that us API 530 to determine a temperature, and then...
Is it a legitimate practice to obtain delta Sn from a course meshed FEA model. I am looking at a report where delta Sp is taken from a model where a very fine mesh is used around a discontinuity, and then the model is run with a course mesh to obtain delta Sn. I can see how this would remove...
I am checking a report and it appears the author is multiplying equation 5.36 by Young's Modulus ambient divided by Young's Modulus at operation temperature. Is this from an older version of the code? I can not find the Young's Modulus ratio anywhere in the code.
.5 * (Kf * Ke * deltSpk) * E/E
I am working with an I-beam grid that can be approximated as a "U" that is fixed at the two ends of the U. A load is applied to the middle of the beam that would act as the bottom of the U. Is there any guidelines as to when torsion should be considered? For instance, is there a ratio of...
I am trying to learn to use Algor at a new company by recreating some old FEAs for practice. The problem is that I only have PDFs to work with so I cannot see how the FEAs were developed. I have managed to successfully recreate some temperature distributions, but I always end up being about...
Bednar's method of determining the stress in the top plate of a support lug has me stumped (page 154, 2nd edition). Bednar uses Fd/h to determine the force on the plate. This would be a force on the radial plane of the vessel. This force is then transformed into a moment by multiplying it by...
