Recently Active Questions

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1 answer
222 views

Does yield point of steel depend on thickness?

I have two different plates of different thickness and I need to calculate yield point. Does yield point of steel plate changes with changing of plate thickness?
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1 answer
63 views

Unit conversion error - Darcy Radius of Well Influence Equation

I'm having a little trouble. I'm trying to convert the answer from imperial to metric but can't seem to get the answer to match. I am using the formula attached (Darcy Radius of Well Influence ...
1 vote
2 answers
47 views

Would the reaction force from the base increase when people are pumping the hydraulic jacks?

I have a hydraulic cylinder on a support base that is going to lift Mass A. When lifting, the user have to exert a force on the jack handle that is pointing downward, right? So when the pumping action ...
0 votes
1 answer
40 views

Using a stainless steel 304 flat plate 1x1/8"as a crossbar - Weight capacity

I am building a vehicle roof platform. The roof has 2 40mm T slot bars running along the length spaced 48" apart. They can handle static load of 700lbs I am wondering what is the max safe load ...
0 votes
1 answer
31 views

Lightweight Single Beam Trailer Design

I am building a lightweight single axle trailer that needs to haul 600lbs cargo loaded evenly over the length of the trailer. Dimensions are 24.5 ft long including the tongue, by 3 ft 6 inches wide ...
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1 answer
21 views

Heat handling in BIPV System

In a BIPV System, how is the heat handled? I mean the cells absorb the solar radiation and along with that the heat. So how is this heat handled? I was reading that the conventional solar system is ...
0 votes
1 answer
78 views

How to model a driver's appropriate braking for deceleration, and throttle for acceleration for a car moving on a straight road?

A project team within my company is stuck on a conundrum and have asked me for some insights. They want to develop a driver model (mathematical or drawn) where input is the car's velocity profile, and ...
0 votes
1 answer
20 views

Was computing technology advanced enough to achieve a nearly fully automated economy in the mid-20th century?

I came across a very interesting Reddit post from a Redditor who claimed that he had worked as a software engineer for nearly 20 years. He said the following about the world's capacity to fully ...
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1 answer
143 views

Can you explain mathematical and mechanics formulation of equation in Junker 1969 paper on self-loosening of fastener by vibration?

Can you help me to understand how the first equation in the paper 'New Criteria for Self-Loosening of Fasteners Under Vibration' by GH Junker, 1969 is derived? I'm not able to understand the ...
2 votes
1 answer
823 views

What is the minor diameter of a thread in terms of its nominal diameter and pitch?

I'm trying to find the formula for calculating the tensile stress area of a bolt. According to page 1528 of The Machinery's Handbook (29th Ed.), that formula is given as $$ A_S=\frac{\pi}{4}\left(\...
0 votes
1 answer
129 views

Getting a 3d object from connecting two parallel surfaces and then viewing the new side surface

I have two slightly different surfaces (circle with a part chopped off and a similar circle but with half of an ellipse in the chopped off part) and I want to connect them into a 3d object and then ...
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2 answers
63 views

How to get wall's lengths of rooms with CAD in which I have only the rooms' areas, walls' rough sketch and wall's thickness information

I have a rectangle with known width and length. I know that there are 4 "rooms" inside such rectangle. I know how these rooms' walls are distributed inside such rectangle. I know the area of ...
1 vote
2 answers
523 views

Deriving the ideal equation for sluice gate problems - incompressible inviscid fluid

I'm trying to figure this problem out, i know the correct answer, and i know the method, but for some reason i'm missing something and i'm just not getting there, any help would be greatly appreciated....
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2 answers
935 views

Does anyone know how would one use "mutexes" in fortran user subroutine so that I can run abaqus job via parallel processing?

I really would like to run my abaqus jobs (that have user subroutines attached to them) very quickly. I have read some sections in documentation about calling a utility subroutine called "MutexInit". ...
0 votes
1 answer
203 views

Heat insulation thickness needed for a truck box conversion

I'm starting to work on a project of converting a truck box to a motor-home, and one of the key components for me is heat insulation. I'm from a sunny country with temperatures that in summer can go ...

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