Rapid evaluation of notch stress intensity factors using the peak stress method with 3D tetrahedral finite element models: Comparison of commercial codes

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RESEARCH PRODUCT

Rapid evaluation of notch stress intensity factors using the peak stress method with 3D tetrahedral finite element models: Comparison of commercial codes

Giovanni Meneghetti Alberto Campagnolo Alberto Visentin Massimiliano Avalle Matteo Benedetti Andrea Bighelli Davide Castagnetti Andrea Chiocca Luca Collini Massimiliano De Agostinis Alessandro De Luca Eugenio Dragoni Stefano Fini Vigilio Fontanari Francesco Frendo Alessandro Greco Giuseppe Marannano Fabrizio Moroni Antonio Pantano Alessandro Pirondi Alessandro Rebora Alessandro Scattina Raffaele Sepe Andrea Spaggiari Bernardo Zuccarello

subject

"notch stress intensity factor (NSIF)"Mechanical Engineering Notch Stress Intensity Factor (NSIF) Peak Stress Method (PSM) FE Analysis Coarse Mesh Tetrahedral element.peak stress method (PSM)"peak stress method (PSM)""coarse mesh"" FE analysis" "notch stress intensity factor (NSIF)" "peak stress method (PSM)" "tetrahedral element"coarse mesh FE analysis notch stress intensity factor (NSIF) peak stress method (PSM) tetrahedral element coarse mesh; FE analysis; notch stress intensity factor (NSIF); peak stress method (PSM); tetrahedral element notch stress intensity factor (NSIF)"coarse mesh"tetrahedral element " FE analysis"coarse mesh notch stress intensity factor (NSIF) peak stress method (PSM) tetrahedral element FE analysis Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine Mechanics of Materials General Materials Science coarse mesh FE analysi FE analysis "tetrahedral element"

description

The peak stress method (PSM) allows a rapid application of the notch stress intensity factor (NSIF) approach to the fatigue life assessment of welded structures, by employing the linear elastic peak stresses evaluated by FE analyses with coarse meshes. Because of the widespread adoption of 3D modeling of large and complex structures in the industry, the PSM has recently been boosted by including four-node and ten-node tetrahedral elements of Ansys FE software, which allows to discretize complex geometries. In this paper, a Round Robin among eleven Italian Universities has been performed to calibrate the PSM with seven different commercial FE software packages. Several 3D mode I, II and III problems have been considered to investigate the influence of (i) FE code, (ii) element type, (iii) mesh pattern, and (iv) procedure to extrapolate stresses at FE nodes. The majority of the adopted FE software packages present similar values of the PSM parameters, the main source of discrepancy being the stress extrapolation method at FE nodes.

year	journal	country	edition	language
2022-01-01	Fatigue & Fracture of Engineering Materials & Structures

https://doi.org/10.1111/ffe.13645