The Ingenious Design of Strain Gauges

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This video explores the fascinating world of strain gauges, these clever little devices that combine elements of mechanical engineering, electrical engineering, and materials science to give us a way of measuring the deformation on the surface of an object.

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This will allow me to create more high quality videos covering a range of engineering topics.

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The Efficient Engineer is a channel aimed at mechanical and civil engineers. The mission is to simplify engineering concepts, one video at a time!

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What are some other interesting strain gauge applications?

TheEfficientEngineer

If this guy produces 3000 hours of content this channel will effectively replace need for mechanical engineering colleges

removename

This is probably the best concise explanation I can send to people about what I do. However, there is one thing that is wrong. Passive temperature compensation is what is described as "active" by using a second gage in the half bridge. ACTIVE is measuring and compensation through thermal calibration, EG you actively have to do something such as math such as read a temperature sensor (RTD, thermistor, etc) then calculate the new impact. When it's just one, we tend to say it's uncompensated and NOT passive. There are all extreme temperature cases where you'd select a different STC code than for the underlying material as you might be in a different area of the curve and can get better performance in high temp or cyro applications.

kwakeham

Fantastic quality as always, i love that you never compromise on quality and uploads your videos when they are done and up to your high standards!

ande

This time I have to leave a comment. Today I was discussing with a colleague how principle strains from my simulation can be compared to our future experiments. And then you upload this video… Thank you 🙏🏼 😊

angelobohm

You do a really great job of presenting new information and then pacing things to let the viewer guess ahead at the next step, and it makes your videos really enjoyable.

For example, I loved the way you showed the multiple gauge bridge configurations first, raising the question “why would you do that?”, then moved on to talking about thermal expansion, and gave me just enough time to excitedly shout “oh you could put one on an unstrained reference material!” at the screen.

chaumas

Fun fact, wheatstone bridge is also used for temperature measuring, but thermistor Is placed instead of gauge.

andrijasaviccsavic

Much detailed, yet explained in such a simple way that even a Layman can get the concept...Appreciate a lot.

Dostonkadost

Excellent description of strain gages and the Whetstone bridge.

JageeAgain

brilliant video thanks for all your work, your ability to unpack complex subjects is unparalleled

MSA

Would be cool if you could cover different ndt methods used for different material. A bit more on the niche side of mechanical engineering but equally important

hi-ldgg

There seem to be two people that invented the strain gauge at essentially the same time, Arthur Ruge and Edward Simmons. Simmons had a lengthy legal fight with Caltech over the patent rights. Simmons became a fairly notable eccentric later in life and was a fixture around the Caltech campus.

charlie

damn, well done! Looks an awful lot like a device I'm currently making a video about, but luckily it's completely different

KnowArt

thank you guys for putting the effort out to produce such quality content, this is my second year in ME and I see a long future for me in this channel. Keep up the good work

littlehunter