28. Timoshenko Beam Theory
The chapter discusses the Timoshenko Beam Theory (TBT) in detail, comparing it with the Euler-Bernoulli Beam Theory (EBT) and exploring important concepts such as governing equations, shear strain, and buckling. The chapter presents mathematical formulations, focuses on practical applications, and examines conditions under which each theory should be applied. Furthermore, the chapter explains the phenomenon of beam buckling and provides methods for calculating critical buckling loads.
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What we have learnt
- Timoshenko Beam Theory introduces deflection and cross-section rotation as independent variables.
- The shear strain is connected to shear stress, which varies within the beam, especially in non-rectangular cross-sections.
- Buckling load calculations indicate the importance of beam dimensions and material properties in design applications.
Key Concepts
- -- Timoshenko Beam Theory (TBT)
- A beam theory that accounts for both shear deformation and rotational effects, thus providing a more accurate analysis for short beams compared to Euler-Bernoulli Beam Theory.
- -- Buckling
- The sudden bending or deformation of a beam structure under compressive loads, leading to potential structural failure.
- -- Shear Strain
- A measure of how much a cross-section of a beam deforms under shear stress, indicative of the angle changes in the beam.
- -- Critical Buckling Load
- The maximum load a slender column can carry before it buckles, dependent on the material's flexural rigidity and length.
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