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7 views

How can we model a full depth reclamation (FDR) layer with emulsion (wet FDR layer) in a pavement design?

So far, I have only been able to model dry layers as I've only been able to represent the FDR layer with one modulus value.
0
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1answer
4 views

How can I use backcalculated modulus results from FWD testing to represent my existing condition using Pavement ME Design?

We only have one adjusted FWD modulus value for HMA layers, but I can only see input options in the form of a grid of frequency and temperature.
-1
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0answers
16 views

How to get an engineering job after a math PhD? [on hold]

I did my undergraduate in electrical engineering (power systems) in a foreign country. Now I am about to finish a math PhD from a low ranked school in the US. Even though I like math, I wished I had ...
1
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0answers
24 views

Is it economical to use solar energy to manufacture solar panels?

Estimates of area needed to be covered by solar panels to power all of the US using only solar are about equal to a 100 mile by 100 mile tract of land. But solar panels have a lifespan of only a few ...
0
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1answer
29 views

Controller vs Micro controller?

We often listen both term in electrical engineering? First one is seen in control systems course and second one in course of embedded systems But what is difference between both of these terms?...
-1
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0answers
16 views

What kind of Research & Development can be done for Metallurgical Coke By-Products? [on hold]

On the chemical side of Blast Furnace By-Products Section: during the distillation process, a large amount of gas and smoke is generated, which –after purification– creates coke oven gas and other ...
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0answers
14 views

How to connect a cable comb to a metal panel?

I have some cable combs, that looks roughly like https://images-na.ssl-images-amazon.com/images/I/71OiqN4CP1L.SL1100.jpg except with a flat bottom, cut from acrylic (ideally 5mm thick). I need to ...
0
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0answers
16 views

Proper name for this weld adapter/sleeve/stub

I'm studying the design and construction of viewports for vacuum systems. Usually, the window is bonded to a welding ring, which is then welded to a stainless flange. (See the cross section below for ...
0
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0answers
12 views

Feasibility of additively manufacturing large metal objects in microgravity/high vacuum (space)

This a somewhat speculative question; I would like to know whether it is feasible to additively manufacture large (>100m) metal objects - from for example aluminum alloys - in a space environment. ...
0
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0answers
31 views

Engineer without physics? [on hold]

I tried understanding most of the concepts about electricity,thermodynamics,mechanics and most of them were easier to understand but the rest not so easy.Is that possible?I tried solving every problem ...
1
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1answer
18 views

Inertial Forces while analysing forces on a Piston in a Slider - Crank Mechanism?

I get that we are analysing the Piston in a non-inertial frame of reference, but the point of my question is that according to D'Alembert's Principle, whenever an inertial force comes in the line of ...
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0answers
20 views

Is it possible to do purification of Sodium Sulphate and which companies do this? [duplicate]

If Sinter filter generates lots of Sodium Sulphate and then is there a way to make purification of this and which companies are already do this process?
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1answer
40 views

Why do Blast Furnace flue dust generates high rates of Zn (Zinc)?

The Blast Furnace flue dust contains high rates of Zn (Zinc). I'd like to know the reason behind this. The chemical reaction of Zn inside blast furnace dust. Why it's rates becoming high?
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0answers
15 views

Temperature logging of li-ion cells

I'm looking to measure and log the surface temperature of lithium ion cells (cylindrical and pouch). I tried using LM35 sensors with an Arduino, but, the drift was too much somehow. Any suggestions on ...
-2
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0answers
18 views

light switch doesnt turn off lights [migrated]

I just recently installed a lightswitch. It's not a dimmer switch, so theres just an off and on. Now, the lights are constantly on! When I turn the lightswitch off, they dim slightly, and when I turn ...
-1
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0answers
11 views

How to find Pontoon Inclination

I did a Civil Engineering course some years ago and from my textbook I had this question. Unfortunately I haven't been able to find a solution to this, as the centre of gravity is not on the ...
-1
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0answers
18 views

How to find Ship Transverse Metacentic Height

I did a Civil Engineering course some years ago and from my textbook I had this question. I found that a very interesting question, but unfortunately I haven't been able to find a solution to this. I ...
1
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0answers
12 views

Difference between ACI Code and Eurocode in Stiffness modifiers?

According to the ACI Code stiffness modifiers (modifiers used to reduce the moment of inertia) are used for each structural elements for example 0.7 for columns and 0.35 for beams... For those who ...
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0answers
12 views

Seismic Design Changes between ASCE and UBC Code?

what is the difference between the seismic design between ASCE and UBC code? from load combinations to loads applied to the history between the sudden shift or change in the code. and which one of the ...
0
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1answer
19 views

What is the Difference between ASCE and IBC Code?

What is the fundamental difference between the ASCE Code and IBC Code and what is the objective of each one? Thank you in Advance.
0
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1answer
17 views

Slab Stiffness Modifiers applied in Vertical Elements design but not in Slab design?

Why in the design of vertical elements (columns and walls) for a structure against lateral loads (such as seismic and wind) we use a slab (or shell) with a stiffness modifiers (such as 0.25 according ...
0
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1answer
20 views

Drop Panel Design Above Columns?

How to design a drop panel at a column in case the column above is rotated or not aligned to the below column (see image below), the code that i am using is the ACI Code if any reference for the ...
0
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0answers
14 views

how do cordless lawn mowers determine lawn density

Some cordless lawn mowers have a feature that causes the motor to cut off when the mower is rolled over a driveway or over a section of lawn where the grass is very sparse. How does the mower sense ...
1
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1answer
19 views

At what level is the Grade Beam most effective at pile cap level or at Slab-on-grade level?

The primary two functions of a Grade/Tie Beam in spread footing and/or pile caps foundation system is to support the Slab-On-Grade (S.O.G) and/or to take the moment from eccentric footing (or moment ...
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0answers
14 views

Difference between Allowable Bearing capacity Service and Ultimate?

When we calculate the dimension of a foundation we always use the allowable SERVICE bearing capacity (lets call it qs) and all the necessary checks are based on this value qs. My question is why does ...
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0answers
21 views

Most efficient turbine for harnessing energy from bidirectional air flow?

I am currently working on designing an oscillating water column as part of a project. In summary: OWC are devices with a semi-submerged chamber or hollow open to the sea below, keeping a trapped ...
0
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1answer
16 views

pmma vs glass windows? [on hold]

I was told that PMMA is preferred over glass for windows in cold climates because of it's R-value being higher than glass.I wish there were a stick-on film made of glass! That could be used to cover ...
0
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0answers
9 views

How to connect to heating networks both with sources and consumers into one network?

We need to connect two distinct heating networks on a wastewater treatment plant into one. So far I've only seen heating networks with one central heat source or one central manifold that all heat ...
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0answers
26 views

Mechanical solution for keeping a vertical stack under pressure

I'm looking for a solution for keeping a vertical stack of small boxes under tension. I will use the device in the attached picture to hold the boxes which will have a lid on the top, and the boxes ...
0
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2answers
51 views

How to calculate required torque

Currently I'm doing a personal project, but I've some doubts about the calculation process. Well, I've a platform (2.30m length x 0.32m width). This platform is supported by 4 wheels with a diameter ...
0
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0answers
24 views

How can we recover/recycle Zinc by Blast Furnace Filter Dust? [on hold]

The Blast furnace's filter dust generates/contains Zinc(Zn) material a lot. We are trying to find out how can we re evaluate this chemical inside of Iron & Steel works. I saw some research ...
1
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1answer
28 views

Can hydraulics be used with a squarish piston?

I'm designing a custom part that needs an active shock absorber and space is restricted. I most likely won't be able to use a stock absorber and was thinking, can two squarish tubes be made tight ...
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0answers
4 views

blockMesh fails with Foam::error::printStack

I am trying to generate a mesh using blockMesh. My blockMeshDict looks like this: ...
0
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1answer
22 views

Straight Pipe Thread

Is there any National Pipe Thread Straight (non-tapered, requires O-ring or compression olive) that is compatible, even loosely, with a machine thread threaded rod? I want to put a reducer on the end ...
1
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0answers
18 views

What engineering concepts are used in EV3 programming/ a Mindstorms robot? [on hold]

If possible, could someone please compile a list of the engineering concepts associated with EV3 programming and Mindstorms robots. Thank you - your answers are much appreciated.
1
vote
1answer
14 views

Can a car's Electronic Stability Control (ESC) operate using electromagnetic braking?

The Wikipedia article for ESC describes the process as using hydraulic anti-lock brakes. However, is it possible for electromagnetic braking to be used instead, with an electic motor/generator in ...
0
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1answer
33 views

Any books about design of complex machines? [on hold]

I'm familiar with several books that deal with the analysis and design of simple mechanisms (such as Norton's Design of Machinery), including four-bar linkages, gear trains and cams. There are also ...
0
votes
1answer
17 views

Can a “surface drive” propeller be submerged if induced supercavitation reduces water surface area?

Assuming induced supercavitation (like Supercavitating torpedo and Juliet Marine Systems Ghost) reduces water surface area does that reduce friction enough to submerge a surface drive propeller ...
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0answers
14 views

Submerged gate hydrostatics question

I know I must integrate this problem, but I am confused as to what exactly I supposed to integrate. Could you help me with the method for solving this problem? dF = rho * g * y
0
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0answers
14 views

When Convection exceeds radiation loss

A very hot small metal cylinder of mass, 50 g and surface area, 2 x 10^-3 m^2 , specific heat capacity, 500 J kg^-1 K^-1 and thermal conductivity, 25 W m^-1 K^-1 is to be rapidly cooled from 800°C and ...
0
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0answers
24 views

How can we evaluate industrial filter residue Sodium Sulphate? [on hold]

If an industrial sinter filter produces much more Na2SO4 (Sodium Sulphate) as residue, what can we do with it ? Can we re evaluate it inside of Iron & Steel plant? Or which importers can buy it? ...
0
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1answer
22 views

How does a nuclear powered rocket engine work?

Nuclear power always require some way of converting the energy from nuclear to electrical or mechanical to be useful. For example, in a nuclear power generation facility, this is done through heat/...
0
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0answers
11 views

Confusion about throttling process

A throttling process is defined as an isenthalpic process. But in certain cases, the throttling process is defined with the stagnation enthalpy being constant (ref: http://web.mit.edu/16.unified/www/...
0
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1answer
28 views

Aluminum tube vs steel

Our question is what size and alloy aluminum tube can be used to replace steel tube in a vertical load application. Our current spec is 1.5” OD STD steel tubing 7 feet long. We will use 6 poles ...
0
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1answer
21 views

Is there something called the stagnation volume?

When discussing the stagnation flow properties we always discuss stagnation temperature, stagnation pressure, and stagnation enthalpy. Is there also a stagnation property called the stagnation volume ...
1
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0answers
20 views

What is the smallest size of pipe to which I can Weld a 1 inch pipe Perpendicular to the Axis?

I would to know what is (or how to calculate) the size (dia) if the smallest pipe to which I can weld a 1 inch pipe from the side of the bigger pipe perpendicular to its axis (like a tee).
-3
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0answers
24 views

Can anyone find the missing (question marked) lengths in the figure below given the dimensions? [closed]

I am working on a project and desperately need to know the missing lengths in the above figure.
0
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0answers
17 views

An eye bolt has to lift 30 kN load. If permissible tensile stress is 60 N/mm2, find bolt size [closed]

An eye bolt has to lift 30 kN load. If permissible tensile stress is 60 N/mm2, find bolt size.
0
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1answer
15 views

Car's shock absorbers' damping ratio

I'm trying to find a suitable shock absorber for a small ATV with a specific value (to be determined later). But everywhere I look, no one seems to be giving the damping ratio of the shock absorbers. ...
0
votes
1answer
18 views

Efficiency of a fully-engaged friction clutch

I'm wondering whether there are any notable losses in a typical automobile clutch when fully engaged. Only losses that come to mind: material twisting with torque changes slipping due to imperfect ...

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