Premium
DESCRIPTION OF SHORT FATIGUE CRACK GROWTH IN A SHOT=PEENED MEDIUM CARBON STEEL
Author(s) -
Koca D,
Koca S,
Tomaszek H
Publication year - 1998
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.1998.00081.x
Subject(s) - weibull distribution , materials science , crack closure , paris' law , peening , probabilistic logic , crack growth resistance curve , probability density function , structural engineering , fracture mechanics , carbon steel , mechanics , metallurgy , mathematics , composite material , engineering , statistics , physics , corrosion , residual stress
A probabilistic and simplified approach to the description of short crack growth in shot‐peened, medium carbon steel specimens is presented. In order to model the dynamics of short crack growth, a difference equation has been formulated with coefficients originating from a two‐parameter Weibull distribution of crack advance. The Fokker–Planck partial differential equation is the source of a solution based on the form of a probability density function of crack length. The resolved function allows one to calculate the expected crack length, crack growth rate and standard deviation of crack length. The viability of the probabilistic method has been verified using experimental data gained for shot‐peened specimens fatigued under reversed torsion.