In this video, Examples based on Thermal Stresses in Composite Bars is explained in following Timestamps:
0:00 – Mechanics of Solid Lecture series
0:20 – Examples based on Thermal Stresses in Composite Bars
8:17 – Practice Example of Thermal Stresses in Composite Bars
Following points are covered in this video:
1. Thermal stresses in composite bars
2. Examples on Thermal stresses in composite bars
Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Mechanics of Solid/ Engineering Mechanics.
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Details of Thermal Stresses in Composite Bars:
Thermal stresses in composite bars are similar to those in homogeneous materials, but the analysis is more complex due to the presence of different materials with different coefficients of thermal expansion. A composite bar is a structural member that is made up of two or more materials, each with different mechanical and thermal properties.
When a composite bar is subjected to a change in temperature, the different materials within the bar will experience different amounts of thermal expansion or contraction, resulting in differential strains. This differential strain can lead to the development of thermal stresses within the bar, which can cause deformation or even failure.
To analyze thermal stresses in composite bars, it is necessary to determine the thermal strain in each material and the corresponding stress distribution. The thermal strain in each material can be calculated using the coefficient of thermal expansion for that material and the temperature change. The stress distribution can be calculated using the principles of equilibrium and compatibility and the constitutive relationships for each material.
The thermal stresses in composite bars can be reduced by selecting materials with similar coefficients of thermal expansion or by designing the bar to allow for differential expansion or contraction. In some cases, it may also be possible to reduce thermal stresses by introducing a compliant layer or interlayer between the different materials, which can absorb the differential strains and reduce the development of thermal stresses.
In summary, thermal stresses in composite bars are caused by differential thermal expansion or contraction of the different materials within the bar. Understanding and managing these effects is critical to ensuring the integrity and longevity of composite structures and components that are exposed to temperature changes.