EdStainless,
thanks for the reply.
This is exactly the kind of information I am trying to learn to retrieve myself.
Essentially, I now have a component made of 4340 at 140-160 KSI with an equivalent round diameter of 1.5''. I am trying to evaluate what the effects would be of replacing the...
Good day,
This has been bothering me for a while:
The table attached is from the MIL-HDBK-5H.
We often specify heat treatment on these steels in the range of 125-145 KSI (usually purchased in the heat-treated condition) or 145-160 KSI (requires additional heat treating). Both these ranges are...
Thanks for both of your replies.
Indeed I wanted to get opinions on what is considered safe for engineering/industrical applications. Like you said, 4340 Q&T to 260ksi tensile has approx 10% elongation (by the way, what does the '4D' refer to in elongation?). I also understand that stess...
Hello,
I have a small cylindrical adapter D=2" L=8".
For the strength needed, according to MIL-HDBK-5H table 2.3.0.2, I should use 4340 over 4140 since 4140 has a maximum diameter of 1" for quenching & tempering.
The question I have is especially regarding material ductility.
I can establish...
@dhengr & @ Terry - my question was especially pertaining to material properties to be used in the design phase. As mentioned above, at this time, I may use MatWeb very early on in the design phase to get a rough idea of some material properties. I find this website useful, however, like Terry...
Tbuelna - your response is very sound, and I cound't agree more.
I realize that this 'simple' question is actually quite complex for some industries, like aeropsace.
Let me elaborate a little more on the purpose of this data: We design custom industrial machines. We specialize in production...
Hello,
I have a very simple question: where do you get your material properties from, either for hand calcs or FEA?
So far, I've been using a combination of textbooks, Machinery Handbook and Matweb.
I would like to buy a single authoritative book for all the times I need a material property. I...
This is all very interesting info.
I gave a bit more thought to the initial question, and I think it boils down to dowel pin engagement length.
The machinery handbook suggests that a dowel pin should be engaged in both parts by a minimum length of 1.5 to 2 times the diameter. This is pretty...
Thanks for all of your inputs.
As TVP pointed out, I am more curious about the local deformation of the hole caused by loading the press-fit dowel pin in bending.
Drawoh:
What do you consider "shear only"?
As mentioned, if you have a 1/2" dowel pin press fitted on the first 1" and...
Hi everyone,
quick question for you:
Imagine we have a 1/2" diameter dowel pin/ground shaft, 2" in length, with the first inch press fitted in a steel 'immovable plate', and with the other inch horizontally sticking out, a la cantilever beam.
Assume the dowel pin carries a certain load...
Exactly!
I need to determine howmuch torque is needed on the bolts in order to obtain this behaviour.
If I continue in the same train of thought, we could say that in order to have both pieces bend as one, we need to eliminate separation.
From a FBD, I can get the forces acting on the assembly...
Hi everyone,
see the image attached.
As you can see, there are 2 different assemblie.
The assembly on the left consists of just a single machined part.
The assembly on the right concists of two machined parts.
Both assemblies (ie. on the right and on the left) have the same over all...
Hi everyone,
I've been looking for an FEA software for some time now.
I do 3D design work in Solidworks (PRO, without the simulation add on - actually it has a lite 'express' version).
So far I've been checking my designs by hand, and I have used the trial version of Solidworks simulation and...
Hi everyone,
I've been looking for an FEA software for some time now.
I do 3D design work in Solidworks (PRO, without the simulation add on - actually it has a lite 'express' version).
So far I've been checking my designs by hand, and I have used the trial version of Solidworks simulation and...
@fsincox: I agree to base all these decisions on function. In this case, say function is locating, with the requirement of assembly and disassembling by hand (for maintenance). Say the parts will be assembled and disassembled say once a month.
In this case, the dowel pins are just 2 standard...
Hi guys,
I'm finally signed up as a member here on eng-tips. Been reading the forums for longer than I can remember, was great help through school and now graduated 1 year ago.
So I'd like to discuss about position tolerances of dowel pins.
For example, let's say we have Part#1 with two 0.250...
