All Questions
Tagged with structural-engineering strength
31
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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1
answer
58
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Conflicting steel strength Vs temperature graphs, NIST NCSTAR vs Engineering Toolbox
This graph is from NIST NCSTAR 1-6C
And this graph is from the Engineering Toolbox.
As you can see, neither the NIST yield or tensile curves match with the ET structural steel curve. Why? And which ...
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1
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25
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What is the shear force at point B? Is it +P or -P or zero? I am not able to find any source that gives the right information
I am not able to understand here that what should be the value of Shear force at point B. It seems to be a discontinous point, as there is point load there, but can we say about the exact value of ...
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Is it possible to model the connection of pre-cast and site cast concrete beam on FEA software such as Ansys?
I'm looking for a way to compare the joint strength of beam-to-column connections of pre-cast and site cast concrete. Is it possible to do this on a FEA software?
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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}{...
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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 ...
-1
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2
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62
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What does cycle mean in fatigue strength diagram?
A shaft at an usual factory might rotate 2000-3000 (10^3-10^4) per day. So, its rotation cycle easily reaches numbers indicated on X axis below. What does number of cycles in the diagram below exactly ...
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3
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92
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Resultant Forces in a vertical rod
This is a pretty basic question. So in the below figure is the representation of prismatic column. The forces are represented as P1 and P2. let x be an arbitrary cross section between A and B. The ...
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2
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102
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How to analyze strongest (honeycomb?) structure?
To be specific I have a structure consisting of a solid material (eg PLA) consisting of a top horizontal slab (eg 3 cm x 3 cm x 0.5 cm) and a bottom horizontal slab (translated vertically, of the same ...
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1
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1k
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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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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 ...
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2
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86
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Waterlogged multistorey apartment
I fraction invested in a real estate project several years back. Mid way through the construction, after about 12 floors, the building contractor filed for bankruptcy. An asset reconstruction company ...
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1
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205
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Why von-mises criteria considers the second invariant of deviatoric stress? [closed]
Why only the second invariant is considered? What about the third invariant?
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1
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3k
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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 ...
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 ...