Stress and Strain essay

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Stress and strain are discussed whenever we talk about the mechanical properties of the matters so all mechanical staff and students will have to deal with these terms again and again.

Although stress and strain of different matters are being discussed repeatedly in field of mechanics but still it is a very delicate issue and thus massive importance is needed in this context. Now coming toward the basic purpose of the paper we would discuss the stress-strain behavior of Mild steel and high yield steel bars respectively.  Firstly if we talk about the Mild steel then usually it largely consists of Ferrite arrangement and it has obtained a superior ductility. Mild steel when endures the process of stress-strain phenomenon then it undergoes multiple yielding effects because the elements present in it; C and N separate out and dislocate rapidly (Boyer, 1987). Now this performance of a matter is taken in terms of how easily it can be transformed or how rapidly the atoms present in it dislocate.

Now in the case of mild steel when the stress-strain occurs over the matter all of its deformation also takes place but if the voltage applied is removed than it rapidly gains its form again before the yield point comes. But in that situation if the yield point comes and the voltage is not yet removed than the deformation would occur permanently. In case of mild steel each and every particle is in the state of rest and is justified in three dimensional formats so when stress is applied the material gets few imperfections in its form and structure. Now this voltage stress would let the particles to move here and there and in return the form would change until and unless the stress is removed and this should be done before the yield point as told before.

When the force goes beyond the elastic edge, the cracks alongside the imperfections take place, and the substance begins to transform its shape and will turn into plastic. This extreme point is called the yield point. It is essential for the reason that it is the actual matter which is not under pressure.

In the next section we would discuss the Stress-Strain behavior of High Yield Steel bars. In the case of high yield steel the point of yield may vary in comparison with mild yield but the process goes like the same (Courtney, 1990). When the stress is applied over the matter the matter loses its form or is reshaped into a random form irreversibly. But here in the case of high yield steel the small level of stress is sustained within the material even if the voltage or stress is removed. Now here when we are talking about the high yield steel the modulus of resilience would be the amount of energy the matter is going to carry along without suffering the breakage.

In a similar way the modulus of stiffness or toughness is the total amount of energy needed to break the structure of the matter. And this point would reach when the high amount of stress is applied through higher voltage or any form of pressure and the yield point of the matter would be overcome and the matter would get fractured. And the materials when said as high yield materials show that they have higher resistance against such pressures or stress.

And so in mechanical terms when the material shows good resistance level than those materials are characterized as the high modulus of toughness. If the substance is overloaded into the plastic assortment than the energy immersed goes beyond the energy released and the amount which differs is degenerated in the form of heat (Hayden, Mo%uFB00att and Wul%uFB00, 1965). So this was the whole stress-strain behavior of both the Mild Steel and High Yield Steel bars.

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