5 Questions
Which type of force is present in an axially loaded bar?
Normal force
In which situations can a bar experience normal stress?
When pulled (tension) or compressed
When is the stress in a bar constant and uniform across the cross-sectional area?
When every point deforms the same amount
What assumptions is the equation for normal stress (σ = P/A) based on?
Material homogeneity and isotropy
Why is the stress distribution different near the concentrated load compared to far away in an axially loaded bar?
Due to the contribution of particles in distributing the load
Study Notes
- Normal stress in an axially loaded bar is discussed, where there is only an internal normal force present.
- In such cases, the bar is either being pulled (tension) or compressed, with examples like trusses, legs when standing still, trees, chair legs, etc.
- The stress in the bar is important to determine when it will break.
- The stress is constant and uniform across the cross-sectional area when every point deforms the same amount.
- The equation for normal stress (σ = P/A) is based on assumptions of material homogeneity and isotropy.
- The equation applies at locations with uniform deformation and is an average normal stress.
- The stress distribution is different near the concentrated load compared to far away due to the contribution of particles in distributing the load.
Explore concepts of normal stress in axially loaded bars, where internal normal force causes tension or compression. Learn about applications like trusses, trees, and chair legs, and how stress distribution varies near concentrated loads. Understand the equation σ = P/A for calculating normal stress.
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