Strain Definition and 413 Threads

Need a help on how to go about building a Laboratory scale using strain gages I need to build a scale with a working range of 2 to 200 gm, an accuracy of at least 2 gm, footprint of no more that 16 in sq, and use no more that 6 strain gages. I believe I need to set up the strain gages in...

I was wondering exactly how yield and tensile strength increases with increasing levels of strain rate for a typical steel grade? I understand dislocations are generated during straining (work hardening), but what happens at higher strain rates which increases the strength?

If a hollow disk of say radius R is heated which causes it to expand a bit and a solid disk of radius slightly greater than R is fixed inside it after which both cool down, the solid disk will be in compression and the hollow disk in tension right? Now if this disk is rotated at a some speed...

http://www.latimes.com/news/nationworld/iraq/la-fg-troops18nov18,0,6045845,print.story Getting ready for the draft?

here's the question...the inner radius of a blood vessel with circular cylindrical cross section is distended during pressure elevation from radius a to a+∆a. assume the wall of the vessel is incompressible and the length of the vessel is constant. find the radial and circumferential...

A 1260kg freight elevator is supported by a steel cable of diameter 34.9mm. It is loaded with a crowd of people collectively having a mass of 2850kg and it is descending. What is the strain in the cable when it is brought to a stop in 0.600s? I'm not really sure how to figure in the fact...

A 1260kg freight elevator is supported by a steel cable of diameter 34.9mm. It is loaded with a crowd of people collectively having a mass of 2850kg and it is descending. a) What is the strain on the cable while the elevator is descending at the constant speed of 2.30 m/s? b) What is the...

I'm having a real problem with this question, could someone please give me a hand? A 1260kg freight elevator is supported by a steel cable of diameter 34.9mm. It is loaded with a crowd of people collectively having a mass of 2850kg and it is descending. a) What is the strain on the cable...

(--Planning Exercise - Strain gauge Coursework Help!--) Hi I've been stuck for several days in the early stages of my coursework i would have asked my tutor but I have been forced to stay home due to a very bad chest infection :frown: I will first provide a full transcript of the question...

A salesman has 6 baskets containing eggs. There are 5,6,12,14,23,29 eggs in 6 baskets respectively. They are either ducks or Hens eggs. The salesman says if I sell one out of the six baskets containing eggs, then I would have chiken eggs twice the no. of duck eggs which basket was Salesman...

I am doing a project on strain gauges. I have the thing set up in a half-wheatstone bridge. Using a pair of strain gauges I am trying to measure the weight!(attaching each one to a side of a ruler/cantilever and bending it by attaching weight to the end) So here's a confusing bit. I no when...

A grandfather's clock is calibrated at a temperature of 20 degrees celcius. The pendulum is a thin brass rod with a heavy mass attached to the end. on a hot day, when the temperature is 30 degrees celcius does the clock 'run' fast or slow? how much time does it gain or lose in a 24 hour period...

Hello, I have problems with the "Engineering Shear Strain" formulas from the following website : http://www.efunda.com/formulae/solid_mechanics/mat_mechanics/strain.cfm I agree with the formulas and the graph on the left, but I don't with it on the right. On the left graph du/dy and...