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hi dear, yes its true that stress increases after lower yield for ductile material. it happens due to reason of strain hardening. strain hardening is the property of the material with which the grain structures presents in the body forms bond between them. so in order to break that bonds, the stress increases after lower yield point..
What else can I help you with?
Is tensile strength of cold rolled steel is greater than yield stress?
For ductile materials, the yield stress is always lower than the tensile strength of the material. For brittle material they can usually be considered the same point. Steel is generally considered ductile.
Find the yield strength from a stress-strain graph?
Follow the graph's positive slope (across the first quadrant) until the graph is no longer linear. The yield strength is determined to be the last point (with concern given to the stress value) on the linear section. After this point the graph is irregular because the material has failed to a point of no return and can no longer handle the load (stress).
A test specimen is stressed beyond the yield point and is then unloaded its yield point will be?
increased...because the specimen is strain hardened due to plastic deformation.
What is proof Stress for Steel?
proof stress can be found by referring to the stress/strain curve at the point where strain is = 0.2% original volume (the material has grown 0.2% in volume) proof stress will be given as a measurement of energy (MPa,KPa etc.) as it specifically refers to the amount of energy required to stress the material to 0.2% its original volume.
Where in the in cross section minimum shear stress is developed in case of a circular shaft under torsion?
Under torsion only, the shear stress is minimum, in fact zero, at the center point ( where radius is zero)
What is the Difference between the Upper and lower yield stress in mild steel?
Lower YS is that point at which the steel flows elastically and failure takes place at upper YS.
What is the difference between yield stress and tensile strength, and how do they relate to each other in the context of material strength?
Yield stress is the point at which a material begins to deform plastically, while tensile strength is the maximum stress a material can withstand before breaking. Yield stress is lower than tensile strength. In the context of material strength, yield stress indicates the point at which permanent deformation occurs, while tensile strength shows the maximum stress a material can handle before failure.
How does increasing the amount of carbon in steel affect properties?
The melting point of steel goes down to a lower temperature when the proportion of carbon is increased. The steel becomes harder and is not as easy to weld as lower-carbon steel.
Which has the lower freezing point oxygen or ethanol?
Oxygen has a lower point.
Why is the boiling point of a substance at low pressure lower than the boiling point at standard pressure?
At low pressure, less energy is required for molecules to escape the liquid phase to become gaseous. Conversely, at high pressure, the boiling point is increased.
Is the freezing point of ice cream lower or higher than the freezing point of water?
It is lower.
Why is the boiling point not the same in Henderson as it is at sea level?
The Boiling Point of a Liquid (a Fluid) is dependent on its Surface Pressure (air pressure). The Air Pressure (due to increased altitude) is LOWER in Henderson than at Sea Level.
Would the boiling point of water be higher or lower on a mountain peakhow would the boiling point be affected in a pressurized system?
The higher the pressure being exerted on the water, the lower the boiling point becomes. Yes the boiling point is affected in a pressurized system. If you put water in a sealed container and kept raising the pressure it will eventually reach it's boiling point without the need of adding heat.
Is tensile strength of cold rolled steel is greater than yield stress?
For ductile materials, the yield stress is always lower than the tensile strength of the material. For brittle material they can usually be considered the same point. Steel is generally considered ductile.
Why is stress a tensor quantity?
stress is having magnitude, direction and point of application of force
Does Increasing the pressure of a liquid lower its boiling point?
No, increasing the pressure of a liquid actually raises its boiling point. This is because higher pressure increases the kinetic energy required for molecules to escape the liquid phase and enter the gas phase, which raises the temperature needed for boiling to occur.
How water is evaporated at a lower temperature under vacuum conditions?
Under vacuum conditions, the pressure is lower, which reduces the boiling point of water. This allows water to evaporate at a lower temperature than under normal atmospheric conditions. The lower pressure decreases the need for high temperatures to overcome atmospheric pressure and facilitate evaporation.
