All Questions
Tagged with strength structural-analysis
16
questions
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64
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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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0
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252
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How much weight can aluminum square tube support?
I'm building a bed platform in a campervan and trying to determine what type of aluminum tube to buy.
I'm thinking to purchase 6061-T6511 aluminum Square Tube with 1.5" width, 1.5" height ...
- 101
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2
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157
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Optimal shape for cantilever beam subject to body weight only
How can I find the optimal shape of a cantilever beam subject only to its own weight, and having the following restrictions?
The cross section is a rectangle
Only the height of the rectangle can vary ...
- 104
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1
answer
58
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Superposition of cylinder stress and normal stress
I need to calculate the principal stresses for the given cylinder with thick walls inside filled with gas shown on this picture:
I used the Lamé equations, namely:
$$\sigma_{x} = p\cdot\frac{r_{1}^2}{...
- 119
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1
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46
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Predicting breaking force of beam per length based on one testing
I've made a plywood carbon sheet and tested its breaking force, for a 200mm long, 50mm wide, 16mm thick it was 100kg +-
I was wondering if it's enough to help me predict what will be the breaking ...
- 115
1
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3
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593
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Design procedure used in beam design
In the design of beams, the principal stresses and absolute maximum shear stresses are not calculated. Instead, we calculate maximum bending stress using flexure formula and equate it to allowable ...
- 88
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2
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7k
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Help with understanding bending moment diagram of a frame structure
I have an exercise where I should calculate and draw a bending moment diagram for a frame structure. The frame structure is similar to the one below, image taken from http://structx.com:
I would like ...
- 1
1
vote
4
answers
103
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Mechanics: example of less mass/volume gives more strength
Lets assume we have a mechanical element from uniform material that is supposed to work in a static load conditions. Moreover lets assume there is no gravity or gravity is negligible.
Are there any ...
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1
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2
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650
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Calculating break point (bend) of a material
I'm trying to compare a really tough polyurethane to baltic birch plywood to see if I can use it instead (a lot of subtractive processes to the plywood, want to eliminate it)
So what i'm looking for ...
- 115
4
votes
6
answers
640
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Increasing torsional-stress resistance of an Auger at its motor-shaft joint
An auger is used to move plastic balls and is rotated by a stepper motor. Due to the balls getting jammed sometimes, this induces stress on the auger at the motor-shaft junction and breaks. Images ...
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3
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307
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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 ...
- 9
1
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37
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Should I use ST or LT values for extruded rod?
In MMPDS for AA7075-73511 (extruded rod) the Table 3.7.10.0(g3) show both ST and LT values for transverse directions. For a rod with circular cross section there is really no Short and Long transverse ...
1
vote
1
answer
74
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Mounting outdoors camera using aluminum 5052
I designed a simple U shape 2mm sheet metal bent mount for a 4kg outdoors CCTV camera. The mount was accidentally produced from 5052-H32 Aluminum instead of 6061-T6.
Is it common to use 5052 ...
- 19
1
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0
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184
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Analysis Of Planar Frame Using Hardy Cross Method (Moment Distribution) With Sway
The image shown below is a sketch of the structure/frame that I am attempting to analyse using the Hardy Cross (Moment Distribution) Method. I need to find the bending moments, axial forces and shear ...
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3
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2
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664
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How to compute core stress in honeycomb structure?
Assume I have a honecomb(sandwich) panel under distributed normal load. Each edge of this panel is simply supported(pinned) as on the picture below:
The problem is how to find the core stresses σ-z (...
- 63