# L9 - Exam I Next Friday(2/22 Covers chapters 1-3 1 crib...

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Exam I • Next Friday (2/22) • Covers chapters 1-3 • 1 crib sheet – double sided • 4 problems (100 points) No class next Monday 2/18

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Chapter 4 Bending
Pure Bending Prismatic members subjected to equal and opposite couples acting in the same longitudinal plane

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Other Loading Types Eccentric Loading : Axial loading which does not pass through section centroid produces internal forces equivalent to an axial force and a couple
Transverse Loading : Concentrated or distributed transverse load produces internal forces equivalent to a shear force and a couple. Principle of Superposition : normal stress due to axial loading + shear stress due to shear loading = complete state of stress for bending.

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Symmetric Member in Pure Bending = = = = = = M dA y M dA z M dA F x z x y x x σ 0 0 • Moment of the couple = bending moment . • From statics, a couple M • two equal and opposite forces. • sum is zero
Beam with a plane of symmetry in pure bending: • member remains symmetric

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L9 - Exam I Next Friday(2/22 Covers chapters 1-3 1 crib...

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