Hello,
This is the first time I design a fixture for a vibration test, so I guess my question might be basic to most of you.
I have an assembly that should be carried by a certain platform.
The Vibration Spectrum of the carrying platform was measured and is given as part of the requirements.
As...
Hello everyone
I have to decrease weight in my assembly.
One of the suggestions is using aluminum bolts rather than using low-medium carbon steel.
I checked if it's possible when considering strength, and it's indeed possible if I increase the bolt's size (and I still lose weight).
The point is...
Hello,
I have an Ultem 1000 Flange that has to be connected to a Titanium container with a screw made of steel.
I am presenting only a portion of the bolted joint for simplification:
First of all I have to point out that my preload is limited by the ULTEM 1000 and hence it's only preloaded to...
Hey,
I am attaching pictures of a conceptual design.
The aim is holding the yellow inner part in place while the green outer part is held from its base and is subjected to accelerations and vibrations.
The aim of the purple parts is fixing the yellow part and minimizing (or avoiding) relative...
Hello,
I would like to make sure I frew the bolted joint Free Body Diagram correctly?
The motivation is identifying which force act directly on the joint surfaces for friction calculations and local normal stresses.
Hello everybody,
I have a bolted joint that is not common - one of the clamped members is made of ULTEM 1000.
Here is an illustration on the simplified clamped joint I tried to analyze:
In most cases we tend to use a joint in which its stiffness (Km) is larger by far than the bolt's stiffness...
Hey,
I am wondering if anyone has a reference to a guide on metal (machined) ribs design in different parts for making it stiffer. I can think of some questions:
1. In which side I have to put the ribs? In the surface side that is in compression or tension? And why?
2. What should be the rib...
Hello everyone,
I have to design a custom nut for my assembly for some reasons - I have a limited place and an exotic material.
As a result I have to make sure that the nut I design will not fail under the predicted loads.
Until now picking up a nut was quite a simple task (as long as you pick...
Hello everyone,
I have to design a bolt made of a material that isn't available in the market and in addition has to be a hex socket button head cap screw. I know that this type of screws has reduced tightening capability that are given in standard table for common materials. In addition I heard...
hello everybody,
I graduated long ago, and I am trying to figure out how to calculate reactions in bolted joint, so I will be able to know what is the external tensile load on each bolt and in addition the shear force that is actually the outcome of a friction generated by the pressure the bolt...
Hello,
Is there an option that a measurement device's accuracy is smaller than its resolution?
I saw a 3D scanner data sheet, and it's written that the volumetric resolution is 0.1 mm while its accuracy is 0.02 mm.
Hello,
I would like to be given some practical engineering examples in which cylindricity is useful.
I am sure there are some useful cases, but I am not sure the examples I encountered use this tolerance efficiently.
In my opinion, in my workplace people tend to use this tolerance for holes and...
Hello,
I looked at an existing design of a linear guiding that is actually working and I couldn't believe it.
Here is a picture of the design concept so you might better understand :
Here is a picture of a simplified drawing (forgive me it's far from being perfect) so you might better...
Hello,
I saw for the first time an engineering department in which the drawings contain a remark "Uniform Thickness XXX".
Here is an example for making it clear:
I never saw a similar comment and I would like to know if it complies with the ISO Standard (or even any other standard).
I thought...
Does anyone has an idea how can I find the optimum shape of the slot in the mechanism described schematically in the attached picture?
I can say that we probably want the lower slot surface normals to coincide with the vertical axis of movement, but I am not sure how to analytically or...
hello,
I am trying to figure out what's wrong with a free body diagram I wrote down.
I added a pdf file with a description of the problem.
please give your advice
Thanks
hello everyone,
I am new in this forum, so hey to everyone.
I would like to consult with you regarding the right way of defining a set of datums in the case described in the attached pdf.
Link
On the first page you can see the general assembly for understanding what the design intent might be...
