Kuinka laskea Bending Stress
Mikä on Bending Stress?
Bending stress is normal stress from moment loading, the primary stress in beams. It varies linearly across the section, maximum at outer fibers.
Kaava
Calculate: σ = M×c/I where M is moment, c is distance from neutral axis, I is moment of inertia
- M
- I/c) — I/c)
- I
- I value — Variable used in the calculation
Vaiheittainen opas
- 1Calculate: σ = M×c/I where M is moment, c is distance from neutral axis, I is moment of inertia
- 2Or: σ = M/S where S is section modulus (S = I/c)
- 3Results show stress distribution
Ratkaistut esimerkit
Syöte
M = 50 kN·m, I = 1×10⁹ mm⁴, c = 200 mm
Tulos
σ = 10 MPa at extreme fiber
Safe stress level
Yleisiä virheitä vältettäväksi
- ✕Using average stress instead of maximum stress
- ✕Forgetting compression and tension can develop simultaneously
Usein kysytyt kysymykset
Why does stress vary across the beam?
Outer fibers experience maximum stretch/compression; inner material near neutral axis experiences less.
How is section modulus useful?
S directly gives maximum stress: σ_max = M/S, simpler than calculating I and c separately.
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