Research on influences of drilling verticality on bearing capacity of rivets under the axial vibration load
LI Chuanzhao
ZHANG Hui
PAN Xin
LIU Xueru
MENG Qingxun
Abstract：The aircraft's inlet structure is connected to the engine sleeve using countersunk rivets.During maintenance,fatigue fractures were discovered in some rivets.It suggests that the inadequate perpendicularity of rivet holes during manufacturing causes the rivet misalignment,reducing the load-bearing capacity,and leading to fatigue fractures under aircraft vibrations.The finite element simulation was used to study the effect of inclined rivet holes on the load-bearing capacity,simulation results show that inclined holes cause uneven stress distribution across the rivet section.The higher the tilt angle,the higher the maximum stress and the more uneven stress distribution on the rivet head section.Fatigue tests under axial loads at different tilt angles demonstrated a reduction in the rivet's fatigue life due to the hole inclination.The study concludes that non-compliance with perpendicularity standards during hole fabrication results in uneven stress distribution,decreasing load-bearing capacity.Therefore,the strict control over rivet hole perpendicularity during the aircraft manufacturing is crucial to ensure structural reliability.
Keywords：RivetDrilling verticalityStress distributionFatigue lifeFinite element simulation
Publication Date：2025-10-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 105-113 )