The stress-strain curve of metals can be divided into two main regions: the elastic behavior region (from O to B) and the plastic behavior region (from B to A). The elastic region represents reversible deformation, while the plastic region represents irreversible deformation.
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Stress - Strain Curve | Plastic RegionIndexé :
In this video, we are going to discuss some basic concepts related to plastic region of Stress-Strain Curve. Check this playlist for more videos on this subject: Materials Science And Engineering : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41LL7_r_i0j7fqvm4HF6fwj Check out the other videos in the playlists below (updated regularly): Sensors, Transducers and Instrumentation : https://www.youtube.com/playlist?list=PLVsrfTSlZ_40qYhVeqtLiNhnQ_40IfOyM Computer Networking and Data Communication : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41sVuPKkqkJhScuGLSXD3OX Communication Systems : https://www.youtube.com/playlist?list=PLVsrfTSlZ_40gwALy13YbKhA1b-3wU_HM Circuit Theory : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43exlsf1BEqQ7STBKZLUrFk Analog Electronics : https://www.youtube.com/playlist?list=PLVsrfTSlZ_40L5nZcdOAEZGuw2W4z8THi Digital Electronics : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43NSnEr2WedLmPcUPdNCWVz Engineering Mathematics : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43iewaoYeWjbT6Tm2ZtcfnX Control Systems : https://www.youtube.com/playlist?list=PLVsrfTSlZ_414rPOeyJLIsbdU974YfK7o Signals And Systems: https://www.youtube.com/playlist?list=PLVsrfTSlZ_40XIv2K8rGUnFqulBdxFNuW Biomedical Instrumentation And Measurement : https://www.youtube.com/playlist?list=PLVsrfTSlZ_42OoOyhzWoDgZrL9iineZxQ Electrical Machines : https://www.youtube.com/playlist?list=PLVsrfTSlZ_40k_Ax_MF1lgKwvbzcpH5iA Basic Physics : https://www.youtube.com/playlist?list=PLVsrfTSlZ_42BQ3DzrrechcZD7dNFRjsc Electricity And Magnetism : https://www.youtube.com/playlist?list=PLVsrfTSlZ_42MJU3bznKEh57mozC6dzf5 Internet Of Things : https://www.youtube.com/playlist?list=PLVsrfTSlZ_40kl6HvTnR9xF3NVREX2afP Neural Networks : https://www.youtube.com/playlist?list=PLVsrfTSlZ_42TbmQUmidUJaiRF8D34zQL Fluid Mechanics And Hydraulic Machines : https://www.youtube.com/playlist?list=PLVsrfTSlZ_42jJ8mYX26uIcy_O8Ft8osu Optoelectronics Devices And Systems : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43MFNf3kjNF-3x6LrS_7qUc Physics Of Semiconductor Devices : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43QjH7NHQ3h11b2eu6D5a-R Satellite Communication Systems : https://www.youtube.com/playlist?list=PLVsrfTSlZ_43SERuuAZZ-u1PBnwwn2ZfC Waves And Oscillations : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41jvs_zfgN1JHXeveJo13ww Electrical And Electronics Measurement : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41QH9r-ci6IufMsrNOea1ts Materials Science And Engineering : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41LL7_r_i0j7fqvm4HF6fwj Process Control And Instrumentation : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41FNjVk8MjdFVR1zONyf5-5 Television Systems And Engineering : https://www.youtube.com/playlist?list=PLVsrfTSlZ_436czGeH3PJ_DPboLQ8HtpL Radar Systems And Engineering : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41cjspqG39G0kfUBYJTV_Xv Engineering Thermodynamics : https://www.youtube.com/playlist?list=PLVsrfTSlZ_41z-8FNjmtGTrHGGQ5foQx3 Engineering Chemistry: https://www.youtube.com/playlist?list=PLVsrfTSlZ_420UdBkKgXnFNl0YkWggiR3 Power Electronics: https://www.youtube.com/playlist?list=PLVsrfTSlZ_40IkGtr8qNtk7i1Jj60xT79 Power Systems: https://www.youtube.com/playlist?list=PLVsrfTSlZ_43BBHC7TAXwrnqalGDmRtHO Mechanics: https://www.youtube.com/playlist?list=PLVsrfTSlZ_40irzhH7o7cilC1wqw5ZEuv Electromagnetic Theory: https://www.youtube.com/playlist?list=PLVsrfTSlZ_41Gv6AyJyowqtWy9ZI9YHy5 Thermodynamics: https://www.youtube.com/playlist?list=PLVsrfTSlZ_425j8TrbygilbdtZVdpr_ib Basic Mathematics: https://www.youtube.com/playlist?list=PLVsrfTSlZ_417x8QsuQkmS7njDe7ld0ko
So, we have discussed the stress-strain curve of metals. Now, in this video, we are going to divide the stress-strain curve into two main parts.
So, if you see here the stress-strain curve we can broadly divide into two main parts.
Okay?
From O to B and from B to A.
So, the region from O to B, the stress-strain relationship, that is called as the elastic behavior region.
And the point the region from B to A up to the fracture point that we can call the plastic behavior region.
So, if you remember, elastic behavior is that which is reversible.
So, in the elastic region, what happens?
If stress is applied on the material the material undergoes deformation, elongation, and when the stress is removed, the load is removed, the material returns back to its original state.
So, this is from O to B. That is the proportional region OA, the Hooke's law region, and then from A to B, where B is the elastic or yield point, which we have discussed.
Now, beyond B, what happens is that here the stress-strain relationship is not proportional. So, here strain goes on increasing even when the applied stress is less. For a small amount of stress, the strain produced is very much. And another important thing other things come into play. Such as elastic hysteresis uh where there is always a residual strain, a permanent strain, which is produced. So, here, what happens is that in this region elastic hysteresis is there. It means there is always a permanent strain in the rod, and the material, the metallic material, it does not return back to its original shape and size. There is always some permanent strain in it, which is irreversible. So, this is plastic behavior. Then goes the tensile strength point, which is the maximum stress which the metallic material can withstand without disintegrating, without breaking or fracture. And then comes the point E, where finally the material undergoes uh deformation and breaks apart. So, plastic deformation is irreversible. It cannot be reversed.
The metal material, after undergoing stress, it does not under return back to its original shape and size. There is always a permanent strain present in it.
So, the two main categories, elastic behavior region and plastic behavior region, OB and BP.
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