All Questions
Tagged with mechanical-engineering materials
273
questions
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28
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What is the effect of lateral friction on the specimen shape
During compression test lateral friction occurs on the lower and upper surfaces of the specimen how does this affect the final shape of it and how do we reduce this effect?
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52
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How do you plot a relation between hardness and strain
How do I plot the relation between hardness of a material and compressive strain knowing the stress-strain curve and indentation size in Brinell's hardness test
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2
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199
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How to mold a silicone sheet?
I'd like to produce prototype parts by molding a silicon sheet (0.6mm thickness) to a shape that looks roughly like below:
If split in two, this part looks like this:
I have attempted to print this ...
- 101
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622
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Why does the stress strain curve sometimes not start from zero?
Here this is a Load-Displacement curve from a compression test I did earlier with my colleges, Below is the resulted stress strain curve from the test from the lab computer why did the curve not start ...
1
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1
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40
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How are surface roughness specimens created?
I'm wondering how surface roughness specimens that are used to calibrate surface roughness machines are created. Specifically those in the 125-200 µin range. Is this typically done with vertical ...
- 25
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3
answers
423
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Difference between elastic limit and yield stress
I am having trouble understanding the difference between elastic limit and yield stress. I searched the internet for a few hours and found some conflicting answers. I have found 3 (maybe) different ...
- 1
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1
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109
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In Column Bucking strength of 24' 3"x3" Hollow Aluminum Tube with .125" Wall thickness
I am designing a Gin Pole to lift a 500# load. The pole will be hollow Aluminum tube 24'x3"x3" and .125" wall thickness pinned at both ends. The pole will be at a 45 degree with the ...
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1
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122
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What is the best pattern of lightening holes to drill vertically (i.e. along the transverse plane) through a rod of aluminum
I have a 5' long, 2" diameter piece of aluminum round bar. I want to make it at least 30% lighter, while preserving as much rigidity as possible. (The force I'm most concerned about is torsion, ...
- 101
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2
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145
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What are the practical solutions to manufacturing this mechanical piece?
My Custom Piece (Measures are in mm)
I'm designing a custom mechanism that needs this piece to be able to function, but when i started thinking about how to manufacture it, I started getting confused ...
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3
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51
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Does the surface finish of the strings on a musical instrument impact the timbre?
Suppose we are testing out different unwound strings on a piano.
Each of the tested strings is made of the same material, has the same length, same diameter, density, etc., the only difference being ...
- 21
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42
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Aluminium tubing strength - size/thickness v length for supporting its own weight
I want to make a simple fruit picker for a tall fig tree. Most of the fruit is lost as it drops when ripe and explodes on impact with the ground below. That or the birds get to it before we do!
So ...
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-1
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2
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90
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Is ultimate tensile strength is constant for a material?
Is ultimate tensile strength is constant for a material? I have performed a tensile test of a frame tube and I made the dumbbell for tensile test.
The test specimen (A) has a thickness 2mm while test ...
- 57
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3
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320
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Relation between welding bead and outer diameter of a pipe?
How can we find a relation between welding bead and outer diameter of a pipe? Welding bead is inside of the pipe and I am using M.S. pipe.
Dimensions are listed below:
Pipe OD=25.4mm
Thickness=2mm
...
- 57
0
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1
answer
176
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What would happen if we applied a stress greater than the yield stress to a rigid-perfectly plastic material?
Say we had a material that was rigid perfectly plastic, with a stress-strain characteristic as shown:
Say that we are drawing this material through two dies, something like this:
What would happen ...
- 117
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29
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Requirement : Open Source API providing properties of engineering materials [closed]
We are a bunch of four in the ultimate year of the 'Bachelor of Engineering - Mechanical' degree. Our final year project is titled 'Computer-Aided Part-Code Generator for industrial parts'.
For the ...
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