# All Questions

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4 views

### 2D- Truss Member Analysis

I am a graduate student trying to sharpen the direct stiffness method skills. However, I am stuck at the beginning. The problem is given in the image. Can someone help me to write down all the nodal ...
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### How to calculate flow coefficient to choose a pressure regulator

I'm attempting to choose a pressure regulator(for use with an inert gas) for a personal project I am working on. I know that the inlet pressure will be 2000 psi and outlet pressure of 300 psi. I also ...
9 views

### What is the rationale for a 6x6 truck chassis with 2 axles front vs. 6x6 chassis with 2 axles rear?

What is the rational for these two different 6x6 truck chassis arrangements? Is it merely a matter of intended distribution of weight across the chassis while in use? As in, two axles up front to ...
5 views

### Ethernet to serial converter using TM4C129EXL

I need help regarding the lwip stack with tiva c, I am building UDP to serial converter, the function is working correctly, but I have some concerns: When I receive the UDP packet buffer, I directly ...
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### What is the top limit for torque per diameter ratio for electrical rotation mechanism working in a tube?

Use case: industrial stop valve placed in an another pipe welded perpendicularly making a T-shape. To make the question more specific let's consider 50mm inner diameter pipe for the linear actuator ...
6 views

### Line of sight to satellite antenna

If I have the ECEF location of a satellite ground station and the beam width, how can I determine if an antenna on a satellite is within range of the ground station? I have the ECEF position of the ...
16 views

### Measuring shaft torque of a small motor

I would like to determine the mechanical output torque and power of a small motor without using expensive strain guages and similar and have come up with the idea of determining the maximum mass that ...
20 views

### Ductility of Fe-Ni Alloy

Cold worked Fe-Ni rod is very brittle and not suitable for drawing. What would be the best heat treatment parameters for increasing the ductility of a Fe-Ni Alloy? Does increase in the Co content make ...
17 views

### what means Probablity of event excedence of so many years

I means to know about occurance of earthquake events when we say that earthquake of 0.5 g will occur in 50 years in excedence of.
25 views

I'm pursuing Mechanical Engineering and i need to learn AUTOCAD, is there any site where i can download free video tutorials
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### Heat Exchangers

LMTD of a counter flow heat exchanger is 20°C and cold fluid enters at 20°c & hot fluid at 100°C, mass flow rate of cold fluid is twice that of mass flow rate of hot fluid. Cp of hot fluid is ...
25 views

### Does the quality of a microphone affect the frequency and intensity(dB) of the sound it can pick up?

Does the quality of a microphone affect the frequency and intensity(dB) of the sound it can pick up? Do all microphones pick up sound as it is in real life?
14 views

### Finite Element software for chemical diffusion in liquid

I'm an engineer who needs to do FEA for the first time. I need to model chemical diffusion in a liquid in a container with specific geometry. For now fluid is assumed to be not flowing. What ...
10 views

### What is the future of line maintenance service providers in EU? [on hold]

To elaborate on the question further. What do you think are the strengths, weaknesses, opportunities, and threats to Line Maintenance service providers based in the EU such as BA Engineering, ...
32 views

### Is there a standard for where treelines are drawn?

On surveys and site plans, I've often found treelines. These look like the below image, and serve to delineate in a very approximate way the areas full of trees and those that aren't: Is there a ...
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### Does Pavement ME Design output the tensile strain beneath an AC layer?

I'd like to know the tensile strain beneath the asphalt concrete (AC) layer in my design structure. Usually, the strain is used to calculate the number of axles (Nf) that the pavement structure can ...
28 views

### installing swing hook before concrete is poured

I want to place a swing hooks in place before the concrete is poured so that , i dont have to drill a hole later. My contractor is not ready to make these bolts with TMT bars itself.. what kind of ...
6 views

### How to get version from an abaqus output database file?

I want to read some data from an .odb file, but when I open it using the C++ API I always get this error message: file.odb is from a more recent release of Abaqus. The current Abaqus ...
8 views

### Sources on SA:V ratio

I have done a fair bit of research but I just dont understand whats the importance of SA:V ratio in terms of physics. There are some articles talking about thermal energy transfer, but most of the ...
26 views

### Is is possible to form a 3D object from the front, side, top views with a triangle, a square and a circle respectively?

A friend of mine asked me this question, but I don't know if it is possible or not. If it is possible, please show me how to construct it. If it is not possible, please prove it. Thanks.
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### What plastic material is best for a snap-fit design?

I'm designing a plastic holder that will secure a metal part with snaps. Which plastic will be able to take multiple removals and re-insertions without getting weaker (bent out of shape) over time? [...
28 views

### What type of engineer/professional designs hydroponic farms?

What kind of professional/architect/engineer builds agricultural systems, specifically automated hydroponic systems? Things such as growing, cultivation, lighting, plumbing, harvesting, processing ...
45 views

### NASCAR corners on public roads

Why don't engineers build highways with corners such those on NASCAR speedways?
13 views

### Phrase to describe products that meet “test for” standards?

Often in the case of safety related products - My example is EN54 Fire detection and fire alarm systems. For a product to say that they comply with this standard, the product has to be tested and ...
14 views

### At which stage can borate solutions be injected to metallurgical coke?

Borates are effective to increase CSR of metallurgical cokes so that can be added to the metallurgical coke in the process, which place is best for this belching process? Coke ovens? Coke ovens (...
27 views

### Mounting an antenna base on a roof using only double sided tape?

I want to put a vertical antenna on top of my roof. The antenna is basically 4 meters of PVC pipe and 5 meters of 19mm aluminium tubing. The roof at my house is corrugated sheet metal, and I want to ...
24 views

### Safety of a 4inch wall [on hold]

One of my house's wall is 4inch wide. My house has one room . and other is lobby that is fully covered by roof. Its wall facing the outside road is 9inch in width. But one wall of it facing to our ...
14 views

### Determining the minimal needed wall thickness between two bores in a control block

Given a control block of simplicity with only two bores. These two bores could be parallel or just could be very close to each other at a specific point in the control block. The material of the ...
25 views

### Why do we analyse frequency response for step inputs?

In my class I'm in, our lecturer presented frequency response methods such as the nyquist plot and bode diagrams. Then when designing a lead compensator later, he said one of the specifications should ...
26 views

### Why do pitching machines use wheels and not solenoids, actuators, servos or peumatic cylenders?

I guess that generating movement is harder then keeping a wheel rolling, but in terms of power consumption is it possible to compare the power consumption of a motor for driving wheels to that of a ...
32 views

### What is the manufacturing method used to make aluminium C channel

I don't know how this is made and I don't know the name of the method to search for it to learn more.
34 views

### Is this space elevator idea plausible? [on hold]

https://imgur.com/yU8ttVq A better Space Elevator idea: Here is my revised space elevator idea. This variation of the space elevator concept solves the flaw in most designs because it doesn’t ...
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### How to derive a value from a transfer function

I have a scenario where a valve q_in(t) is pumping water into a tank of height h(t) and area A, which is then pumped out by a second valve q_out(t) that has a resistance to water flow R. I got this ...
28 views

### How to calculate load on roller to create given deflection?

I am trying to calculate what loading on a fixed roller will create a predetermined maximum deflection. I ran some calculations, but the values I'm getting are significantly lower than I would expect. ...
131 views

### What are the meanings of B.C. 3/8“ and 6-11/32”?

I'm totally ignorant in this area, and probably didn't know how to properly google my question - sorry.. I found this specification here: (https://si.shimano.com/pdfs/ev/EV-RH-IM10-2045B.pdf). My ...
17 views

### Fluidic muscle in reverse, as a pump. Does this exist?

A fluidic muscle is a pneumatic or hydraulic actuator, consisting of a flexible tube. When the tube is filled with a working fluid (pressurized air or hydraulic oil), it balloons out and shortens. In ...
27 views

### Please,i am not sure if it is a bearing defect , could someone help me?

This pump has shown high vibration level on axial orientation (pump side). The picture represents velocity spectrum on horizontal. Some peaks matches BPFI. I had no training on vibration analysis (...
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### Euler's equations of rigid body motion

I am trying to come up with a mathematical model of a miniature crane arm. In most of the resources that I found online, I find that the approach is using Euler's equations. My understanding of using ...

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