{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

EAS209 L23_ Shearing Stresses in beams-Spring 11

# EAS209 L23_ Shearing Stresses in beams-Spring 11 - EAS...

This preview shows pages 1–3. Sign up to view the full content.

EAS 209-Spring 2011 Instructors: Christine Human 2/7/2011 1 Lecture 23- Shear Stresses in Beams Lecture 23 Chapter 6 Shearing Stresses in Beams Transverse loading applied to a beam results in both internal shear forces and bending moments. Bending moment normal stresses I My x Shear force shear stresses THIS CHAPTER While the dominant criterion in the design of a beam for strength is generally the maximum value of the normal stress caused by bending moments, (Chapter 5), shear stresses can be important, particularly in the design of short, stubby beams. Today’s Objectives: Calculate shear stresses in beams Calculate forces in bolts and nails in built-up sections Today’s Homework: EAS 209-Spring 2011 Instructors: Christine Human 2/7/2011 2 Lecture 23- Shear Stresses in Beams Elementary normal and shear forces Distribution of normal and shearing stresses must satisfy equilibrium M dA y M dA z M dA F x z x y x x 0 0 We previously used the above equations to determine the distribution of normal stresses due to bending (lecture 15). Now we consider the remaining three equilibrium equations involving the shear stresses:   0 dA z y M xy xz x symmetrical section V dA F xy y xy must exist because V exists 0 dA F xz z but we cannot conclude 0 xz All 3 equations involve only σ x

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
EAS 209-Spring 2011 Instructors: Christine Human 2/7/2011 3 Lecture 23- Shear Stresses in Beams Longitudinal Shear Stresses However, since τ xy must exist (vertical shear stress
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 6

EAS209 L23_ Shearing Stresses in beams-Spring 11 - EAS...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online