QUALITY OF MEASUREMENT COURSEWORK YOUNGS MODULUS

Please could you clarify this. At high pressures, the shear modulus also appears to increase with the applied pressure. Your e-mail Input it if you want to receive answer. In a steel, unless it is heavily cold worked, you should not see a diff in Modulus based on direction. You can add this document to your saved list Sign in Available only to authorized users. Download Now Metal additive manufacturing is revolutionizing how parts are designed and produced, offering solutions that were impossible just a few years ago.

Several models exist that attempt to predict the shear modulus of metals and possibly that of alloys. Thanks MagBen, what do you exactly mean for yield point? In Ti CP you have material with a hex crystal structure that develops a texture when rolled. Definition of Steel Young Modulus Gpa 1. What was historically done to get the value Gpa? Not trying to beat to death, but for a specific material, could it exist a tendency that the higher the yield, the higher the mudulus? AS Unit 1 Topic 7.

Young’s modulus of a copper wire. If you did adjust alignment and used strain gauges attached to the test piece you may get somewhere but qulaity best method to accurately determine the modulus of steels use either resonance or ultrasonic measurement.

All of them arise in the generalized Hooke’s law:. Add this document to saved.

young modulus of copper coursework

Click Here to join Eng-Tips and talk with other members! For the linear portion, the best regression is naturally linear regression, otherwise it is against the defination of YM. I mean considering which steel and which SS limits?

Well as I recall you need to identify the area of the curve that you were experiencing linear elastic deformation. Upload document Create meashrement. Here is a lecture that covers this in some detail with a practical demonstration. A traditional extensometer will rock on its knife edges and have some movement and even non-contacting devices can courseeork backlash in their drives.

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As normal we take great care for the machining and test piece alignment during compressive test but not during tensile.

I agree with the comments about modulus depending on interatomic bonding and the way it dominates behaviour. Download Now Metal additive manufacturing is revolutionizing how parts are designed and produced, offering solutions that were impossible just a few years ago.

You don’t want to be measuring residual stress and calling something else. There is no dependance of Modulus on strength, they are independent parameters. One possible definition of a fluid would be a material with zero shear modulus. By using this site, you agree to the Terms of Use and Privacy Policy.

I was involved in reviewing a programme of JIC Single Specimen tests carried out on AB specimens some years ago and the crack ,odulus were calculated using specimen compliance based on an E value of GPa which seemed a little on the low side.

Material coursework- young modulus of copper | Physics Forums

I think accurate determination of E for a typical category of material is important to know and would always use ultrasound or resonance methods of its determination.

Definition measuremet Steel Young Modulus Gpa The values of the elastic moduli depend primarily on the types of interatomic bonds that are present and the crystal structure.

quality of measurement coursework youngs modulus

A good tensile machine with self aligning gimble mounted jaws and good extensometers will actually yield good data. The shear modulus of metals is usually observed to decrease with increasing temperature. Definition of Steel Young Modulus Gpa Even a regression analysis will be problematic as is there is a measurement error in the basic loading line you will just be fitting incorrect data. Last edited modulys a moderator: As they explore options, optical and mechanical engineers are forced to make choices and tradeoffs during the design process.

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Taking away the mechanical “slack” would help the material behavior more isotropically.

young modulus of copper coursework

Homework Help Introductory Physics Homework. The exact requirements vary between specifications. Perhaps it will help.

As Brittle Elastic materials don’t have much work hardening capability this will seriously impact on their ability to tolerate defects and I would imagine that an LEFM approach may be better and evaluating these types of material and KIC may be a better guide to is performance. The assumption fails, because you can not use the yield point to calculate modulus, the tendency may still exist: As you stretch the wire then your cross sectional area shrinks and so on and so on until you are into the region of plastic deformation.

Ed’s statement “tensile maybe different, while Mudulus does not, based on testing directions” appears inconsistent. It looked how i expected it would until i added the uncertainty bars.

quality of measurement coursework youngs modulus