Jiangyu Li, University of Washington Lecture 16 Torsion Mechanical Behavior of Materials Section 4.9.3-4.9.4 Discussion on the torsion test posted online Jiangyu Li University of Washington Mechanics of Materials Lab
Dec 20, 2015
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
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-3 Deformations of a circular bar in pure torsion.
Angle of Twist
Jiangyu Li, University of Washington
Fig. 3-4 Deformation of an element of length dx cut from a bar in torsion.
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-5 Shear strains in a circular tube.
Shear Strain
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Shear Stress
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-7 Longitudinal and transverse shear stresses in a circular bar subjected to torsion.
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Torque
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-10 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).
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Principal Stress
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-25 Strains in pure shear: (a) shear distortion of an element oriented at = 0, and (b) distortion of an element oriented at = 45°.
Jiangyu Li, University of Washington
Torsion Test
Jiangyu Li, University of Washington
©2001 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license.
Fig. 3-24 Torsion failure of a brittle material by tension cracking along a 45° helical surface.