All Questions
Tagged with materials civil-engineering
32
questions
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What is the formula to define the flexural strength of an upright cylinder?
I have been making cylindrical concrete coasters and, for fun, have been seeing if my friend's can snap them. Every subsequent mix design I'll change the mix itself or the dimensions of the geometry ...
- 103
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58
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Rotation of a tube
See image... why is it that in part 1 the answer is negative but in part 2 it is added instead of subtracted?
I thought because I got a negative in part 1 I would have to subtract in part 2 but the ...
3
votes
1
answer
184
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Why is the frustum of a cone used to slump test of concrete and not a cylindrical tube?
While performing the slump test for knowing the workability of a concrete mix one uses a tube having the shape of frustum of a cone in order to conduct the test. Why is not a cylindrical tube used ...
1
vote
1
answer
99
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What is the most accurate mathematical model of a cantilever beam's bending?
I read there are multiple models for it,
Plate theory, euler-bernoulli, timoshenko beam theory etc
Which is the most accurate for modelling the bending of a stressed cantilever beam?
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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 ...
- 11
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2
answers
51
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Will the material plastically deform or fail when heating or cooling?
You have a stainless-steel rod with constraints on both ends that is held rigid. Initially, it is at room temperature before getting heated to 300 Celsius. Then, it is cooled to room temperature again....
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170
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where did the concrete splitting test calculated stress formulat come from?
In compression test of cylindrical concrete sample we get the normal stress easily by dividing failure force by sample cross section, but how we can explain the formulat used to determine tensile ...
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1
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765
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How do I properly scale down a force for scale-down model testing?
I am designing structural frame for a shipping container that would have 8000 lbs of weight stacked on top of it. Of course, i don't access to real size container. I have built a model whose scale is ...
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70
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Are there any ways to know whether the element has failed under loading, while knowing only limited properties?
I opt to check whether a precast concrete wall (no reinforcements, only concrete) withstand both vertical and lateral loading condition but the only properties I know are the Young's Modulus, density, ...
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252
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Lifespan of steel frame houses
We are considering to build our family house. Where I live, people build either:
Concrete beams for the structure and then thermal bricks for the external walls; or,
Heavy duty steel structure and ...
- 101
2
votes
1
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39
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Can aggregate gain almost 200 grams of water when submerged in water for a day?
I'm doing this special project where I have to make concrete using a Martian simulant provided from a commercial source.
I measured it as 500 grams initially, then submerged it in water for a day. It ...
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3
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530
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Why do we use the strain-controlled test for the compressive strength of concrete?
As you all now, a typical stress-strain curve for concrete under compression can be seen in any reinforced concrete design textbook. The decreasing part of the curve (post-peak) can be obtained by ...
- 31
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1
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2k
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Does the volume change under the tensile or compressive stress?
This confusion arise because my teacher says that volume does not change under tensile/compressive stress within the elastic limit of the material ( consider metal here). But as far as I can see via ...
user23622
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Optimization of ash stockpile height to minimize haul truck fuel costs
How would I find out the optimum height of an ash stockpile in order to minimize diesel haulage costs, for a CAT haul truck?
My stockpile height is required to be between 25m to 50m.
I have worked ...
- 51
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Is there a relationship between depth/diameter/etc... of meteoric craters and the strength (eg:compressive strength) of the target material (sand...)?
So I am trying to write a high school research paper (3700 words) on the topic above. I am not sure if there is such a relationship, but I think intuitively we can agree that different materials will ...
- 1