Search results for query: *

Ok...... In the mean time I've been digging around in text books and found that for a give meridional moment M for a cylinder of thickness t the meridional bending stresses are given by 6M/t^2. Problem solved. Apologies I spelt pipe wrong in the title!! Dave

Afer some more thought... I think I was overcomplicating this: I simply use the well known formula: S = M r / J S: stress at a fibre at a distance r from the origin M: Moment r: Radius J: Polar Moment of inertia Now, I have moments about the mean radii of the cross section (see image), will...

How does one hand-calculate the varying through-wall stresses of a pipe due to an axi-symmetric meridional moment ie flaring? I have no clue where to start for this one. Thanks in advance Dave

TGS4 Thanks for the sanity check. Though not sure how to work out shears of a pipe due to meridinal bending stresses... I'll have a look. dhenger Just for my benefit lets assume differences in structural and thermal expansion is not neglible. The other option would be to assume they are...

I think I can calculate the resultant inner/outer radii and then calculate the resultant stresses based on the known displacement (see attachement). Right I'm going to shut up now... thanks in advance...

2. Displacements will be larger for the stiffer material 3. Displacements will be smaller for the less stiff material Apologies; the above points are in relation to the displacements for each pipe at the junction if I assessed each pipe separately. Dave

I have two pipe ends of the same diameter that are welded together. The pipes being made from different materials having different Young's Modulus (E) and different Coefficients of thermal expansion (a). There is an internal fluid pressure operating at a high temperature. I want to assess the...

Oh you were referring to FEA with regards to lifting equipment... sorry I wasn't clear, I have not used FEA on any lifting equipment so far... as yes its fairly simple to substantiate the designs, I use it for other complex shaped products. Appreciate your book suggestions though! And again a...

SNORGY Having no welds does not remove the ability of something to move. Most lifting equipment can be designed ensuring load paths travel through sections, fasteners, etc. We were designing some one off lifting equipment, of course the off the shelf slings and RHS use seemless welds, however...

A very good strength of materials book by Timoshenko is suggested by everyone. However, there appears to be 'modernised versions', for example: Strength of Materials book - Timoshenko (3rd ed) Mechanics of Materials - James M. Gere, Stephen P. Timoshenko 5th - A 'rehash' (want for a better...

JohnRBaker: Thank you for those your suggestions. Sorry, when I mean FEA its not so much on how to use it, what I mean is the theory behind it, I don't think ANSYS really publish such texts, mostly the extensive help documentation explain how to do something or am I wrong?.. Again, I've done...

I'm aware that similar request have been made (and my apologies), however, I'm trying to cater the question with regards to my particular role to get more appropriate recommendations. Dave

OK I've found posts something similar to this in the structure forum and realised that its littered with civil structure engineers. As most suggestions are to do with concrete, wood and foundations. Now I'm in the right place! I'm a mechanical stress engineer in the energy industry and thus...

Thanks for your response, that's my problem, I never purchased any books, only the odd course I did had a textbook as 'compulsory'. When I did buy a book i never used it, so only used the material provided by the professors; and I don't have all my notes to provide any book recommendation. My...

Hi, Question: Can you make any suggestions of entry level books that will help me to follow a career as a Stress Engineer? Background: I've been in the nuclear industry now for 1.5 years (Graduate role) and tried lots of job roles in Mechanical Engineering; Manufacturing, Safety, Stress and...

Ah sounds like you hadn't setup your connections with your beams. You must have done the following in Design Modeller: Highlight selected parts under the part tree, RMB 'Form new part'. What this does is create a 'mulit-body part' what this means is that the new part at the interfacing...

"This generally indicates rigid body motion" When ever you get an error like this it means that you have not constrainted your model enough, ie something is being displaced at an infinite distance and so has aborted the job, make sure you have applied your Boundary conditions correctly and/or...

Very helpful thankyou. I believe I left the default on (Full integration), I was wondering why my shear loads were acting up, I was aware of shear locking and issues with incompressibity of elements, just didn't know how to battle it. I take it this is why my shear stresses are incorrect...

To create a mesh with Hexa elements for that kind of geometry you would require to slice (or break down) your part into smaller sub-parts. The task of slicing this into a multi-body part of simple geometries will be time consuming. This is the only reason why Hex elements are not recommeded...

For those whom are lazy: Tet linear elements require 15-50 times the number of nodes for a converged solution and still provides a margin of error of 1% which is 5-10 times greater than the other elements. Is this right? Full story: I've performed a fairly thorough mesh convergence study for...