Bending Stress کا حساب کیسے لگائیں
Bending Stress کیا ہے؟
Bending stress is normal stress from moment loading, the primary stress in beams. It varies linearly across the section, maximum at outer fibers.
فارمولا
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
مرحلہ وار گائیڈ
- 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
حل شدہ مثالیں
ان پٹ
M = 50 kN·m, I = 1×10⁹ mm⁴, c = 200 mm
نتیجہ
σ = 10 MPa at extreme fiber
Safe stress level
عام غلطیاں جن سے بچنا ہے
- ✕Using average stress instead of maximum stress
- ✕Forgetting compression and tension can develop simultaneously
اکثر پوچھے جانے والے سوالات
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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