چکیده مقاله
The fracture resistance of thin walled metallic structures containing notch like discontinuities is of critical importance in aerospace structural integrity assessment This study presents a systematic numerical investigation of Mode I fracture behavior in a centrally notched Al 2024 T3 plate containing a round V notch RVN using the extended finite element Method XFEM implemented in Abaqus 2024 The influence of two key geometric parameters, the notch tip radius and the opening angle, was examined across nine configurations while all other geometric and material parameters were held constant Crack initiation was governed by the maximum principal stress criterion and damage evolution was described by a linear displacement based traction–separation law The results establish a clear hierarchy between the two parameters The notch tip radius is the dominant factor governing fracture resistance, with blunter tips consistently producing higher peak loads and greater displacement capacity before crack initiation, reflecting the progressive reduction in local stress concentration as the tip geometry becomes less sharp The opening angle plays a secondary but consistent role, with wider notches reducing the peak load due to the greater volume of load bearing material removed from the cross section A mild interaction between the two parameters was also identified, whereby the sensitivity to opening angle diminishes with increasing tip radius These findings suggest that in damage tolerant design of notched aluminum components, optimizing the notch tip radius offers a more effective means of improving fracture resistance than modifying the opening angle
کلیدواژهها
نویسندگان
A.A. Sirous
۱ M Sc Student in Mechanical Engineering, Iran University of Science and Technology
M.R Ayatollahi
۲ Full Professor, Fatigue and Fracture Research Laboratory, School of Mechanical
شیوه ارجاع
Sirous, A.A. and Ayatollahi, M.R,1404,Influence of Round V-Notch Geometry Parameters on Mode I Fracture Resistance in Al 2024-T3: A Parametric XFEM Analysis,29th National Conference on Electrical, Computer and Mechanical Engineering,Shirvan
ارائهشده در
مجموعه مقالات بیست و نهمین کنفرانس ملی مهندسی برق ،کامپیوتر و مکانیک28 بهمن 1404 · شیروان