jiangyu li, university of washington lecture 16 torsion mechanical behavior of materials section...

Jiangyu Li, University of Washington

Lecture 16Torsion

Mechanical Behavior of Materials Section 4.9.3-4.9.4Discussion on the torsion test posted online

Jiangyu LiUniversity of Washington

Mechanics of Materials Lab


©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.

Fig. 3-3 Deformations of a circular bar in pure torsion.

Angle of Twist


Fig. 3-4 Deformation of an element of length dx cut from a bar in torsion.




Fig. 3-5 Shear strains in a circular tube.

Shear Strain



Shear Stress



Fig. 3-7 Longitudinal and transverse shear stresses in a circular bar subjected to torsion.



Torque



Fig. 3-10 Circular tube in torsion.

Jiangyu Li, University of Washington©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.

Fig. 3-20 Stresses acting on a stress element cut from a bar in torsion (pure shear).



Principal Stress



Fig. 3-25 Strains in pure shear: (a) shear distortion of an element oriented at = 0, and (b) distortion of an element oriented at = 45°.


Torsion Test



Fig. 3-24 Torsion failure of a brittle material by tension cracking along a 45° helical surface.

jiangyu li, university of washington lecture 16 torsion mechanical behavior of materials section...

Documents

division of thomson

shear stress slide

shear strain slide

torque slide

torsion pure shear

pure torsion

principal stress slide

torsion failure