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Bridge terminology - railing-like parapet
If a bridge has a parapet that is nota fully solid block and resembles railings with posts, as the following image
What is this type of parapet called?
What are the top, bottom, post, and hole of the railing-like structure called?
Thanks!
seamux
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How to draw a shear force diagram when two forces are acting at the same point
I am working on this question on my statics assignment:
Approximately at point B there are two forces, 20kN and 50kN.So far, I have only calculated global equilibrium and got the following…
AugieJavax98
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Will molten glass stick to a graphite shelf inside a kiln?
Normally, so called shelf papers are used or special coatings called kiln washes are used to prevent molten glass from adhering to the kiln shelf while it is being fired. This is expensive and time consuming. Can a different material be used that…
Walter Quigley
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2 answers
Is the fill factor of a photo-voltaic cell constant?
An important factor in specifying the efficiency of photo-voltaic (PV) cells is called the fill factor (FF). It is defined as the ratio of the maximum power of the cell to the product of the open-circuit voltage $V_{oc}$ to the short-circuit current…
Moody
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Term for double slope from street
One of the places I frequent recently had the curb and sidewalk rebuilt by the city. Previously, there was a roughly continuous transition from the street to the rest of the private drive next to the building.
After the rebuild, the sidewalk was…
user16
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votes
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Shear Force Diagram of a Simply Supported Beam with triangular load distribution
I've been attempting this fundamental shear force diagram problem for several days, but can't seem to get the correct result. I'm trying to calculate the shear force diagram in terms of $x$, but I'm unsure about the intensity $w(x)$ of the…
AVelj
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Why do modern MRI scanners use an axial static field?
Last night I was reading some fascinating history of the first full-body MRI scanner and noticed that it's fundamentally different from modern scanners in one particular way: the static B field is vertical, while all the modern machines I've seen…
Bernd Jendrissek
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2 answers
Should I discard part of the data (steel traction test)
(please excuse my bad English. I don't speak English)
I have to deal with an old hydraulic machine, recovered from a deposit. I have no knowledge on mechanical engineering. Only civil engineering.
The machine is for doing traction tests on steel…
zexot
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5
votes
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Design behind typical keyed construction joints in concrete walls
Construction Joints
Construction joints in concrete footings or walls are places where the concrete pour can be stopped so that everything doesn't have to be poured at once. Later, once the concrete has hardened, the next part of the concrete can be…
hazzey
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5
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2 answers
Fluid mechanics cauchy's stress tensor
Is cauchy's stress tensor symmetric always?Does this symmetricity hold in accelerating and non-zero cross velocity gradient flow field?
Mohit Saini
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How is steel tempering addressed when installing pre-heat rivets?
AFAIK when you heat up a piece of steel to high temperature and let it cool down slowly (as opposed to shock cooling by say submerging it into water) steel gets softer - that's called tempering. Steel getting softer means it can bear less load…
sharptooth
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Are stress concentrations a concern when replacing rivets with high strength bolts?
A common method of repairing old riveted structures is to replace any damaged rivets with new high strength bolts.
When this is done, the new bolts are typically installed like they would be on a new structure which results in a bolt pretension. My…
hazzey
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5
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1 answer
How to calculate a modified sine curve?
I am designing a two dimensional cam profiles. I want to use the "modified sine" method for drawing the position and angle changes. (see attached sketch). The modified sine curve is actually a combination of cycloidal curve at the first and…
birdman3131
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How do I model a longitudinal tensile strain in a laminate composite using Abaqus software?
I want to be able to measure the strain response in a material composed of 2 lamina, bottom one (0) top one half (0) half (90), and see the differences in the unidirectional versus the bidirectional area.
I've been trying with the Lamina function,…
LDPC
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How do I calculate the gear ratio to lift a weight at a constant speed?
I have an 80 g·cm motor with a rotational frequency of 15,000 rpm. I want to lift a weight of 2 kg at a speed of 0.5 m/s. How do I calculate the gear ratio required?
lee wei
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