Static_Failure_2 - Ductile Material Failure •Yielding...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Ductile Material Failure •Yielding occurs when the distortion strain energy per unit volume reaches the strain energy per unit volume for yield in simple tension 2 / 1 2 1 3 2 3 2 2 2 1 2 ) ( ) ( ) (                     2 / 1 2 2 2 2 2 2 2 ( 6 ) ( ) ( ) (                   zx yz xy x z z y y x           For pure shear?? Y S    Y S 577 . max   How? Yielding criterion 1-Distortion Energy Theory (DE): von Mises 2-Maximum Shear Stress (MSS): Tresca • Yielding occurs when the maximum applied shear stress becomes equal to the shear stress at yielding • Slip lines are formed at 45 deg of the axis of tension  1 >  2 >  3  2=  3=0  =  /2  1=  What if all stresses are equal?   y y S S    3 1 m ax 2    ys S For uniaxial stress Yielding criterion        23 1 23 2 2...
View Full Document

This note was uploaded on 10/31/2009 for the course MECH 420 taught by Professor M.s during the Spring '09 term at American University of Beirut.

Page1 / 12

Static_Failure_2 - Ductile Material Failure •Yielding...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online