Engineering Stack Exchange
Engineering Stack Exchange

Most Popular

more tags
1500 questions
4
votes
3 answers

Why shouldn't we use Bernoulli beam theory if deformations and rotations are large?

I was going through the basic assumptions made by Bernoulli beam theory. I realized that one of the most important assumption in this theory is that the deformations and rotations of the beams are supposed to be small, not large. I couldn't…
Rameez Ul Haq
  • 1,345
  • 5
  • 25
4
votes
1 answer

How to determine the dynamic response of a spring-mass system?

The Problem I have the following system for which I would like to determine its dynamic response, taken from these lecture notes pg.20: where the forcing functions are $u_1 = 1-U(t - t_0)$, $u_2=0$, and $u_3=0$, $U(\cdot)$ is the unit step function…
kostas1335
  • 43
  • 4
4
votes
2 answers

How do I manufacture a fillet?

What are the most popular and the most efficient ways to machine a fillet on an external edge of an object? If I were to use a CNC mill, what tools can I use for it, and how would the method change with the radius of the fillet? I could imagine that…
Slovakov
  • 171
  • 1
  • 1
  • 7
4
votes
3 answers

Equivalent viscous damper for friction damping

I have a friction damping system which is exited by a harmonic force FE (depicted on the left side). Is there a way to convert the friction damper to a linear or nonlinear damper, such that the damping at a given excitement frequency is equal? I am…
M. Martin
  • 143
  • 5
4
votes
2 answers

Amp-Hours vs Volts in electric chainsaw specifications

Can someone please explain what I am losing/gaining in the trade-off between Volts and Amp-Hours when buying a piece of equipment such as a chainsaw. I'm currently comparing two items. I'm making this concrete with actual products because I think…
Guy
  • 143
  • 6
4
votes
2 answers

Is sensor measurement uncertainty the same with its calibrator?

I'm trying to calibrate a proximity sensor A with another proximity sensor B. Say sensor B uncertainty is already known from the data sheet. However, for sensor A the uncertainty is nowhere to be found. So I try to calibrate sensor A with the…
el-cheapo
  • 385
  • 2
  • 12
4
votes
1 answer

Flattening teflon plate

I have a 6" x 6" x 1/4" piece of carbon filled teflon that is slightly curved (I think it must have come off an roll of enormous diameter) that I need to flatten. The carbon fill is carbon black, not carbon fiber, in order to make the material…
DKNguyen
  • 5,626
  • 1
  • 12
  • 23
4
votes
2 answers

Ensuring even flow in liquid pumping in distribution circuit under suction

I have a liquid circuit which looks a bit like that: The system is under suction, and the flow rate through each unit should be about 10ml/min. However, we noticed that unit n and the ones the furthest away from the pump and bottle were not getting…
am304
  • 1,831
  • 13
  • 22
4
votes
6 answers

Can aluminium foil be a thermal insulator?

I've searched on Google that aluminium foil can be a thermal insulator, but how does it work? From my thought process, it should've been a conductor because its a metal, right? But, some said that because its so thin and has large surface area, the…
el-cheapo
  • 385
  • 2
  • 12
4
votes
3 answers

Improving ac efficiency in car

I live in Oklahoma. HOT in summer. I drive a small car. Honda Fit. Seems to me, a smaller cabin would cool faster than a larger one. If I "made my car cabin smaller," would the ac work better? I was thinking empty pop bottles, but figure need to…
Rob Dye
  • 41
  • 1
4
votes
3 answers

Is there a maximum life for things made out of stainless steel or cast iron?

Do steel objects have a maximum lifespan? I read that "316 stainless steel is estimated to last for 1200 years in a “rule“ environment before heavy pitting. In the marine environment this is reduced to a mere 260 years." Are they referring to steel…
Justify
  • 41
  • 3
4
votes
3 answers

How does my automatic car shift without complete temporary loss of acceleration

When my car shifts gears, the car's acceleration never goes to 0. I feel that there is constant torque to the wheels throughout the entire shift. How is this possible during a gear change? Transmission is Ford's 10R80
Ardalan G.
  • 91
  • 4
4
votes
1 answer

Alternatives to laser line?

I'm trying to project a very thin line at a low angle over some surface defects (peaks and troughs). The scale is ~20mm square, but the defects can be sub-mm (0.2 - 1.0mm). I am currently using a line generated by a laser pointer. The $4 laser…
John
  • 165
  • 5
4
votes
1 answer

Filling gaps in heatsink design to improve thermal conductance?

I am currently pondering modifying my laptop's heatsink and am curious whether I stand to gain any benefit at all. The CPU and GPU (similar heatsink design) reach high temperatures (90°C +) under load and the exhaust air is warm, but far from…
Betaminos
  • 143
  • 4
4
votes
4 answers

Engineering Best Practice: Rev control for trial parts after release?

In my company, we distinguish prototype from production prints by numbered vs. lettered revisions in the title block, and numbered revisions don't require an ECN in the title block. This allows us to efficiently track prototype revisions during the…
rothloup
  • 149
  • 4
1 2 3
…
99
100