How is the internal strain energy within a beam caused?
How is the internal strain energy within a beam caused?
Strain energy:
When a system undergoes a stress and rearranges itself due to deformation, the energy is stored in the form of potential energy. And this form of potential energy is known as strain energy. Generally, its unit is taken as J.
Internal strain energy in the beam:
When an external force reacts on a beam, it causes deformation in the structure of the beam. The elastic deformation is stored in the form of potential energy within the structure of the beam, which is known as internal strain energy. It depends on the size of the beam. It is basically used in determining the impact of load applied on the beam.
The expression for strain energy is,
Here б is the stress applied on the beam, E is Young’s modulus and V is the volume of the beam.
As the above formula suggests that, for bearing the impact load-
- The volume of the beam should be large.
- The Young’s modulus should be less of the material.
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