6. Angular Momentum Balance
The chapter delves into the balance of angular momentum, detailing the contributions of traction and body forces. It explores the dynamics of deriving the angular momentum balance equation and its representation in a coordinate system, culminating in a symmetric stress tensor outcome. Furthermore, it discusses the relationship between externally applied loads and the stress matrix within a fluid body at rest, integrating fundamental principles of mechanics and fluid dynamics.
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Sections
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What we have learnt
- Angular momentum balance can be derived considering both traction and body force contributions.
- The stress matrix must remain symmetric, even under the influence of external forces or acceleration.
- The pressure within a fluid body at rest generates traction that aligns with the normal to the surfaces of the fluid.
Key Concepts
- -- Angular Momentum Balance
- A principle in mechanics that equates the sum of angular momentum contributions from various forces, including traction forces and body forces.
- -- Stress Matrix
- A mathematical representation of stress states within a material, capturing internal forces acting on a differential volume element.
- -- Traction
- Force per unit area acting on a material surface, essential for understanding how external loads affect internal stress states.
- -- Fluid Statics
- The study of fluids at rest, emphasizing the role of pressure and its effects on forces within fluids.
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