BÉZIER BASE EXTENDED ISOGEOMETRIC NUMERICAL METHOD FOR THERMO ELASTIC-PLASTIC ANALYSIS OF CRACK PROPAGATION IN CRACKED PLATE UNDER WELDING RESIDUAL STRESS AND THERMAL LOAD

A new procedure in the field of Bézier base extended isogeometric method (XIGA) has been introduced to analyze effect welding residual stress and thermal load on crack propagation rate fatigue life. This is based constitutive thermoelastic plastic equation. The main parts this are using B´ezier XIGA calculate redistribution due growth compute value intensity factor (SIF) field. For purpose, grid points elements (with C0-continuity) around line tip identified by level set representation. Then, discontinuous enrichment functions added analysis approximation. Thus, does not require re-meshing process. results show that there a good agreement between proposed numerical Hole-Drilling Strain-Gage method. interaction integral used extract SIF. effects SIF considered superposition Also, Walker equation modified life caused loading stress. display finite element Due advantages method, which eliminates parametric space allows precise addition basis cracked (crack or tip), obtained highly accurate shows effective for analyzing problems.