Author: Dr. P. Vinod Kumar Naidu, CH.Sandeep, S.Raju, K.Teja Hari Sumanth Reddy, G.Veera Satya Subrahmanya Swamy
Doi: https://jmeb.2026.v11.i01.pp54-68
Abstract:
Accurate fracture parameter evaluation is essential for predicting crack initiation and propagation in structural components containing surface flaws. In three-dimensional cracked bodies, stress intensity factors (SIFs) and T-stress govern crack-tip behavior and structural integrity under linear elastic conditions. This study presents a detailed finite element–based investigation of mixed-mode SIFs (K?, K?, K?) and T-stress for representative three-dimensional surface cracks using ANSYS Mechanical. Two benchmark configurations are analyzed: (i) a rectangular block containing a semicircular surface crack under tensile loading, and (ii) a tubular X-joint containing a warped semi-elliptical surface crack subjected to pressure loading. The interaction integral method (CINT) is employed to extract fracture parameters along the crack front. Structured SOLID186 elements are used in the crack-front region to accurately capture stress singularities.
Download PDF