In-Class Activities: •Follow up •Concepts • Theory, formula, steps •Applications • Problem Solving • Quiz types • Video Project discussion Today’s Objective : 7 TH September To: a) Understand the context, concept and derivation for bending stresses . b) Be able to calculate max and min stresses due to symmetric and unsymmetric bending on a given body. BENDING STRESSES
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BENDING STRESSES - WordPress.com · 2017. 9. 7. · Chapter 6: Bending Mechanics of Material 7. th. Edition. Unsymmetric Bending. Orientation of the Neutral Axis The angle αof the
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In-Class Activities:
•Follow up
•Concepts
• Theory, formula, steps
•Applications
• Problem Solving
• Quiz types
• Video Project discussion
Today’s Objective : 7TH September
To:
a) Understand the context, concept and derivation for bending stresses.
b) Be able to calculate max and min stresses due to symmetric and unsymmetric bending on a given body.
Chapter 6: BendingMechanics of Material 7th Edition
Example 6.15The simply supported beam has the cross-sectional area as shown. Determine the absolute maximum bending stress in the beam and draw the stress distribution over the cross section at this location.
Solution:The maximum internal moment in the beam is kNm 5.22=M
Chapter 6: BendingMechanics of Material 7th Edition
Example 6.17The beam has a cross-sectional area in the shape of a channel. Determine the maximum bending stress that occurs in the beam at section a–a.
Solution:The resultant internal moment must be computed about the beam’s neutral axis at section a–a. Since the neutral axis passes through the centroid,
Chapter 6: BendingMechanics of Material 7th Edition
Example 6.19 A T-beam is subjected to the bending moment of 15 kNm. Determine the maximum normal stress in the beam and the orientation of the neutral axis.
Chapter 6: BendingMechanics of Material 7th Edition
Example 6.21 (Not examined)A composite beam is made of wood and reinforced with a steel strap located on its bottom side. It has the cross-sectional area as shown. If the beam is subjected to a bending moment of 2 kNm, determine the normal stress at points B and C. Take Ew= 12 GPa and Est = 200 GPa.
Solution:We will transform the section into one made entirely of steel.