Abstract
The results of study of cold expansion holes and their diameters on stress distribution, fatigue crack nucleation and its growth under uniaxial loading of plates are presented. A series of fatigue tests were carried out using plates containing plain holes and cold expanded holes in aluminium D16chT alloy (Al 2024-T3). In all cases, the increase of plain and cold expanded hole diameter from 8mm to 10mm increases crack initiation lifetime with a length of c1=0.25mm and 0.5mm. With the increase of cold expansion degree, the relative fatigue lifetime of specimens with both diameters decreases for a crack to initiate with the length of 0.25mm and increases for the crack to initiate with the length of 0.5mm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
