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Hot Rod, Agreed. After the exam I will do the calcs both ways and post to see what we find. Canwesteng, Firstly, thank you. 1) I actually was meaning when a bolt was loaded axially, not transversely. What you are saying makes sense for a shear / transverse situation, but imagine a flat...

Hot Rod, Oops! Luckily I do tend to calculate out even the obvious (or not) numbers so I don't make a stupid mistake just like that! Either way, it is about 77% of the area, so I still don't understand why we just call it good using the nominal diameter unless the threads do contribute to the...

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Hi Pete, thanks for your comment and good clarification. I was actually referring to the calculation for stiffness k= (A*E)/L where you are using the cross sectional area. Lindberg and others seem to use the nominal area, however, for example, for a 1" nominal fastener, the tensile area is...

Hello, I am preparing for the PE exam in 2 weeks and have some fundamental questions I would like to ask, starting with bolt stiffness. Many of these questions I know how to calculate, but I have been putting off understanding the "deeper" logic until now. Thanks in advance for your responses...

I am wanting to understand the difference between J & Ju. I understand that Ju is the unit polar moment of inertia and it must be multiplied by an area (throat for example) to calculate the stress at that point. I am good with the throat area derivation. The way I am thinking about it, if you...

3DDave, it was more that $125 and $175 are decent sums of money, not that either wouldn't be worth it drawoh, I am primarily picking it up for a reference book for the Mechanical PE exam and of course for potential use afterwards. HPost, where did you find this PDF? chicopee, the...

Hello, I am going to be purchasing either of the two mentioned editions of Marks to have for taking the Mechanical PE exam and later for my library. On Amazon I found the following commentary about the 12th edition: Though revised and added two new chapter [Applied Mechanics and Engineering...

Dgallup, Thanks for your reply. I played around with it as you suggested, and was able to find how I can assign the feature (hole for example) to be created at the part level- cool stuff. The one thing I couldn't find however was how to create an axis or datum and similarly assign it to the...

I sometimes am basing the placement of a feature in part "A" dependent on how things are coming together in assembly "ABC" which consists of Parts "A", "B" and "C". If i create say a axis or hole in assembly "ABC", how can i transfer or reassign that feature to part "A"? You can imagine that i...

Thanks jpankask, I'll look into that.

Hello All, I have a degree in M.E. and passed my EIT when I graduated college about five years ago. Since graduation, I have worked in technical sales as a sales engineer. In this capacity, I 1) do not work under a P.E. and 2)don't do work that satisfies my state's requirement for creative...

Thank you both for your thoughts

I am looking at my options regarding patent search including potentially filing a provisional patent or full patent. The online companies offer there services at roughly 1/3 the rate of a local patent attorney. Does anyone have experience using these services?

Thanks Aust! I'll give that a try and let you know.

Hi Berkshire, Thanks for your comment. I am looking for something close to the rubber piece that is pictured when you search of Adel clamp: The difference is that it would have the cross section as posted above. The "tabs"/"ears" that protrude from the upper surface help to locate or center...

Hi Julep, Thanks for the link. The issue more comes from finding something that has the cross section posted above. There is a whole world of rubber strip products, but I am not familiar with a variety that is a) not a tape and b) has the cross section as sketched. The purpose of the raised...

I am looking for a supply of rubber spacers/strips as illustrated in the attached image. The purpose of this strip is that you would supply several different thicknesses so that you can put the spacer of your choice inside a tube which clamps around a round surface. The thicknesses would be...

I am trying to form two fillets from body 1 to body 2 as seen in the attached photos. I tried doing an extrusion from the right edge of surface 1 to body 2 and then extrude backward but this did not work. The problem is that surface one has a curve two it, so as i extrude back (into the...

Hello All, If you have a minute, can you suggest how you would go about creating the attached file in Pro E? It is a scaffolding based tower approximately 32 ft. tall. The model is simply for promotional purposes (ie inserting the model in a site picture to illustrate the concept), no FEA or...