Stresses and its types
-
Upload
muhammad-sheeraz -
Category
Engineering
-
view
64 -
download
0
Transcript of Stresses and its types
![Page 1: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/1.jpg)
![Page 2: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/2.jpg)
ON
TYPES OF STRESSES
BY
MUHAMMAD SHEERAZ MEMON
ROLL NO# K-15ME-01
![Page 3: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/3.jpg)
Stresses occur in any material that is subject to a load or any applied force.
There are many types of stresses, such as: residual stresses, structural stresses, pressure stresses, tensile stress, compressive stress, bearing stress, flow stresses, thermal stresses, and fatigue stresses.
![Page 4: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/4.jpg)
Residual StressesResidual stresses are due to the manufacturing processes
that leave stresses in a material. Welding leaves residual stresses in the metals welded. Stresses associated with welding are further discussed later in this module.
Types Of Stresses
![Page 5: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/5.jpg)
Structural stresses are stresses produced in structural
members because of the weights they support. The weights provide the loadings. These stresses are found in building foundations and frameworks, as well as in machinery parts.
Structural Stress
![Page 6: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/6.jpg)
Pressure stresses are stresses induced in vessels
containing pressurized materials. The loading is provided by the same force producing the pressure. In a reactor facility, the reactor vessel is a prime example of a pressure vessel.
Pressure Stress
![Page 7: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/7.jpg)
The normal stresses can be either tensile or
compressive whether the stresses acts out of the area or into the area.
Tensile & Compressive Stress
![Page 8: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/8.jpg)
When one object presses against another, it is
referred to a bearing stress ( They are in fact the compressive stresses ).
Bearing Stress
![Page 9: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/9.jpg)
Fatigue stresses are due to cyclic application of a stress. The stresses could be due to vibration or thermal cycling.
The importance of all stresses is increased when the materials supporting them are flawed. Flaws tend to add additional stress to a material. Also, when loadings are cyclic or unsteady, stresses can effect a material more severely. The additional stresses associated with flaws and cyclic loading may exceed the stress necessary for a material to fail.
Fatigue Stress
![Page 10: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/10.jpg)
Thermal stresses exist whenever temperature
gradients are present in a material. Different temperatures produce different expansions and subject materials to internal stress. This type of stress is particularly noticeable in mechanisms operating at high temperatures that are cooled by a cold fluid.
Thermal Stress
![Page 11: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/11.jpg)
Flow stresses occur when a mass of flowing fluid
induces a dynamic pressure on a conduit wall. The force of the fluid striking the wall acts as the load. This type of stress may be applied in an unsteady fashion when flowrates fluctuate. Water hammer is an example of a transient flow stress.
Flow Stress
![Page 12: Stresses and its types](https://reader034.fdocuments.in/reader034/viewer/2022050900/5a6d8c367f8b9ad1418b5b23/html5/thumbnails/12.jpg)
THANKS