فهرست مقالات Rahmatollah Ghajar مقاله 1 - Prediction of the Subsurface Crack Growth Lifetime in Railroad Wheel of the Iranian Railway System Rahmatollah Ghajar Javad Alizadeh International Journal of Advanced Design and Manufacturing Technology , شماره 5 , سال 4 , زمستان 2010 مقاله 2 - Triaxiality factor and Lode angle effects on failure of a steel considering plastic anisotropy Giuseppe Mirone Arash Keshavarz Rahmatollah Ghajar International Journal of Advanced Design and Manufacturing Technology , شماره 4 , سال 5 , پاییز 2012 مقاله 3 - Numerical Investigation of the Mixed-Mode Stress Intensity Factors in FGMs Considering the Effect of Graded Poisson’s Ratio 20.1001.1.20083505.2017.9.1.13.8 R Ghajar S Peyman J Sheikhi M Poorjamshidian Journal of Solid Mechanics , شماره 1 , سال 9 , زمستان 2017 مقاله 4 - A New Strain Based Model for Predicting Multiaxial Fatigue Life of Metals رحمتا... قاجار صفا پیمان جواد علیزاده کاکلر Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering , شماره 4 , سال 4 , زمستان 2011