作者: Jay Prakash Srivastava , Prabir Kumar Sarkar , V R Kiran Meesala , Vinayak Ranjan
关键词:
摘要: A THREE-DIMENSIONAL ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS (FEA) IS CARRIED OUT TO ESTIMATE THE ROLLING CONTACT FATIGUE (RCF) CRACK INITIATION LIFE FOR VARIED SLIP RANGE ON RAIL ARISING FROM OPERATIONAL VARIATIONS. WHEEL LOAD PRODUCES HERTZIAN PRESSURE. VARIATION IN ENGINE TRACTION INDUCES VARIATIONS THAT EVOLVES THERMAL TERMS OF HEAT FLUX. APERIODIC DEVELOPS NON-PROPORTIONAL MULTIAXIAL LOADING. PRESENT STUDY COMBINES THESE EFFECTS BY TRANSLATING MULTIPLE (TWELVE) PASS PRESENCE LOAD, PRES-SURE AND THROUGH PROPOSED SIMULATION. TEMPERATURE DEPENDENT CHABOCHE MATERIAL MODEL WITH NONLINEAR KINEMATIC HARDENING LAW IMPLEMENTED STRESSES PLASTIC STRAINS GOVERNING CONDITION AT INTERFACE. LOCATION MAXIMUM VON MISES STRESS, FOUND POINT OR LAYER BELOW RAIL-HEAD, CONTEMPLATES SITE. CODED SEARCH ALGORITHM HELPS IDENTIFY CRITICAL PLANE CORRESPONDING PARAMETER (FP). CONTRAST AVAILABLE PREDICTIONS RCF CONSIDERING PRESSURE AND/OR FRICTIONAL ISOLATION, ALL LOADS TOGETHER PROVIDES MORE REALISTIC RESULT NUMERICAL