Stress concentration and relative stress gradient analysis for the V-notch with measured morphology and dimensions
XU Guangtao
HUAN Pei
LIU Tianyi
LI Songru
LIU Lanrong
Abstract：Focusing on the stress concentration problem of V-notches,considering the actual measured surface morphology and geometric profile,the impact on stress concentration was studied based on finite element methods.By applying the notch superposition effect,the measured surface morphology and geometric profile were incorporated into notch.Relative to smooth theoretical V-notch dimensions,the formulas of stress concentration factor(SCF)and relative stress gradient(RGS)were modified.which were validated through simulation using multiple sets of measured morphology and dimension data.Analysis of variance was employed to investigate the influence of surface morphology and geometric profiles on the stress concentration factor and relative stress gradient.The results show incorporating measured geometric profiles more accurately assesses stress concentration factors and measured surface topographies more accurately assesses relative stress gradients.Additionally,smaller notch dimension and rougher surface morphology increase stress concentration.
Keywords：V-notchSurface morphologyGeometric profileStress concentrationRelative stress gradient
Publication Date：2025-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 58-67 )