This preview shows pages 1–9. Sign up to view the full content.

Design of a Transmission Shaft • If power is transferred to and from the shaft by gears or sprocket wheels, the shaft is subjected to: transverse loading + torsional loading . T r an s v e l o ad i n g transverse loading To find maximum shearing stress: Normal stresses due to transverse loads may be large Shearing stresses due to transverse loads are usually small

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

View Full Document
Design of a Transmission Shaft • At any section, J Tc M M M I Mc m z y m = + = = τ σ 2 2 2 where • Maximum shearing stress, () 2 2 max 2 2 2 2 max 2 section, - cross annular or circular a for 2 2 T M J c J I J Tc I Mc m m + = = + = + = • Shaft section requirement, all T M c J max 2 2 min + =
Sample Problem 8.3 • Determine the gear torques and corresponding tangential forces. • Find reaction forces • Identify critical shaft section from torque and bending moment diagrams. • Find maximum shear stress or Calculate minimum allowable shaft

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

View Full Document

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

View Full Document

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: diameter. Stresses Under Combined Loadings Pick a section through points of interest. Determine force-couple system at centroid of section required to maintain equilibrium. System of internal forces consist of three force components and three couple vectors. Determine stress distribution by applying the superposition principle. Stresses Under Combined Loadings Normal stress Axial force in-plane couple Shear stress shear force components twisting couple Stresses Under Combined Loadings Normal and shearing stresses -> principal stresses maximum shearing stress orientation of principal planes. Analysis is valid only if: superposition principle Saint-Venants principle....
View Full Document