Questions tagged [strength]
This is to be used for topics regarding the strength of materials, the analysis of internal forces in a body and all the governing principles which considers deformation of bodies.
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Stopping force exerted on a rope. (Checking if rated strength is sufficient)
I have a 23 kg dog, and a rope lead that is rated to 50 kg.
If the dog is running away at say 6 mph and I pull on the lead to decelerate and stop the dog within say half a second or say 0.5 meter what ...
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Timber strength in tangential and radial directions
Normally for structural timber, two values for compressive and tension strength are given. One value is given for timber in direction of the grain, and other is given at 90 degrees (perpendicular) to ...
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Steel tubing size question for building a giant swing
a customer has asked me to build a giant swing that will be suspended between two trees in a forest near their home. The swing will need to be 12 feet wide and could end up supporting eight or nine ...
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Best support for a granite table top?: Flat bar 316L Stainless Steel or equal box section or unequal box section
Project is outdoor granite topped table. Table legs are two isosceles trapezoids crossed together at 90 degrees, with the legs having an internal angle of 80 degrees, made from 100 x 100 x 4mm 316L ...
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What is the Hoop stress and bending moment relation
So I am working on a club telescope project. I have to design the tube for the telescope.
So I found hoop stress to be most critical stress.
The tube's bottommost end has a mirror and a mirror cell. I ...
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How do I calculate the strength of a carbon fiber tube?
I am not a mech engineer and have been struggling with this for a while, I feel like it is pretty straight forward but I'm missing something.
The problem is a horizontal tube that is supported at one ...
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Server rack modifications - strong enough?
Question: Can I modify this rack and have the result still strong enough to hold the content?
I have a server rack made from Steel. However it is 1980's old and doesn't quite conform to modern ...
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How to calculate the material and thickness I need for a certain force on it?
I am trying to figure out how to design how thick a material has to be so that the bar shown in picture 1 stays intact when a user is running on it.
Background: The project is a treadmill and the user ...
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Techniques to make residential buildings more blast resistant
There are generally two approaches:
First: use stronger materials (e.g. thicker RCC with fibres, go underground, etc).
Second: for any given material, use a superior design.
The First approach is ...
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Why the size of top and bottom rollers is different in three point bend test?
In a short beam shear testing of polymers, the configuration is such that the top (loading) roller is bigger than the bottom (support) rollers. Why is this the case, and what happens when the size of ...
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Most efficient fillet design given an envelope (for stress)
If one has a specified allowed X length and Y height, into which a fillet can be placed to reduce stress concentrations, is there an equation which can be used to determine the optimal shape of the ...
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Is the a similar method of calculating moment in inelastic bending like in the case of torque for inelastic torsion?
When calculating for Torque in torsion or for Moment in the case of bending, the concept is usually first introduced with the simplification of the assumption that the stresses and strains are in the ...
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How many support beams/rods needed for a firewood storage cabinet
I am building a firewood storage cabinet which should support around 100-150 kg of firewood.
The cabinet is made out of wooden boards (...
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Proof load for screwing into aluminium plate
I have a required clamping force for fastening two pieces of metal together, and am trying to work out if an m4 bolt will be sufficient. The pieces will be fastened without a nut, just a hole through ...
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Is it possible to use Plain Cement Concrete post for fencing?
I am in need of around 700-800 posts to fence my farm in a semi-arid area in TN state, India. In my place granite posts mined from quarries are normally used. It costs around Rs 300-400 per post(6-7ft)...
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