PSI - Issue 82

M.S. KannanKulavan et al. / Procedia Structural Integrity 82 (2026) 44–50 KannanKulavan et al. / Structural Integrity Procedia 00 (2026) 000–000

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sults show that for inner-edge cracked annuli, T-stress strongly depends on geometry and pressure ratio, remaining negative at low external pressures but becoming positive for larger cracks and thinner annuli, indicating increased crack-tip constraint and a greater tendency toward brittle fracture. Conversely, outer-edge cracked annuli consistently exhibited negative T-stress across all configurations, signifying a stable, low-constraint condition. Overall, the findings emphasize the geometric sensitivity of constraint behavior in pressurized annular components, providing a practical framework for fracture assessment and design. Future work will focus on validating the present findings through de tailed finite element and experimental investigations, and on extending the methodology to encompass more complex loading conditions such as thermal gradients and bending e ff ects. Ayatollahi, M., Pavier, M., Smith, D., 1998. Determination of t-stress from finite element analysis for mode i and mixed mode i / ii loading. International Journal of Fracture 91, 283–298. doi: https://doi.org/10.1023/A:1007581125618 . Betego´n, C., Hancock, J.W., 1991. Two-parameter characterization of elastic-plastic crack-tip fields. Journal of Applied Mechanics 58, 104–110. doi: 10.1115/1.2897135 . Du, Z.Z., Betego´n, C., Hancock, J.W., 1991. J dominance in mixed mode loading. International Journal of Fracture 52, 191–206. doi: 10.1007/ BF00034904 . Fett, T., 1997. A green’s function for t-stresses in an edge-cracked rectangular plate. Engineering Fracture Mechanics 57, 365–373. doi: https: //doi.org/10.1016/S0013-7944(97)00034-9 . Fett, T., 2001. Stress intensity factors and T -stress for internally cracked circular disks under various boundary conditions. Engineering Fracture Mechanics 68, 1119–1136. doi: 10.1016/S0013-7944(01)00025-X . K.K., M.S., Surendra, K., 2025a. Weight functions for opening mode stress intensity factors for double edge cracked rings using two reference configurations. Theoretical and Applied Fracture Mechanics 139, 105004. doi: https://doi.org/10.1016/j.tafmec.2025.105004 . K.K., M.S., Surendra, K., 2025b. Weight functions for t-stresses in inner / outer double edge cracked circular rings. Theoretical and Applied Fracture Mechanics 136, 104782. doi: https://doi.org/10.1016/j.tafmec.2024.104782 . Omar, B., Mohammed, h.m., Guy, P., 2016. A review of t-stress calculation methods in fracture mechanics computation. Nature Technologie . Rice, J.R., 1972. Some remarks on elastic crack-tip stress fields. International Journal of Solids and Structures 8, 751–758. doi: https://doi. org/10.1016/0020-7683(72)90040-6 . Srinath, L.S., 2016. Advanced Mechanics of Solids, Third Edition. McGraw Hill Education (India) Pvt. Lmtd. Wang, X., 2002. Determination of weight functions for elastic T -stress from reference T -stress solutions. Fatigue & Fracture of Engineering Materials & Structures 25, 965–973. doi: https://doi.org/10.1046/j.1460-2695.2002.00557.x . Zhou, X., Wang, L., Berto, F., Zhou, L., 2019. Comprehensive study on the crack tip parameters of two types of disc specimens under combined confining pressure and diametric concentrated forces. Theoretical and Applied Fracture Mechanics 103, 102317. doi: 10.1016/j.tafmec. 2019.102317 . References