FAILURE THEORIES(FATIGUE): ANALYSIS AND TYPES
Mar 20, 2021
{FAILURE THEORIES/TOF} UNDER FATIGUE LOADING: STUDY AND ANALYSIS
Failure in components under fatigue loading are dealt with the S N curve analysis method.
S N curve in these stress systems plotted with following conditions :
MEAN STRESS(σm) on abscissa (x-axis) and VARIABLE STRESS (σV)/ STRESS AMPLITUDE(σa) ON ORDINATE (y-axis).
THEORIES OF FAILURE ( FATIGUE LOADING):
1)SODERBERG LINE:
*A straight line which joins σe on ordinate (0, σe) to σyt on abscissa (σyt,0) .
*Analysis based on the Yield Strength(σyt) of the material.