Paano Kalkulahin si Bending Stress
Ano ang 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.
Pormula
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
Step-by-Step na Gabay
- 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
Mga Nalutas na Halimbawa
Input
M = 50 kN·m, I = 1×10⁹ mm⁴, c = 200 mm
Resulta
σ = 10 MPa at extreme fiber
Safe stress level
Mga Karaniwang Mali na Dapat Iwasan
- ✕Using average stress instead of maximum stress
- ✕Forgetting compression and tension can develop simultaneously
Mga madalas itanong
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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