Failure Analysis and Structure Optimization of Titanium Alloy Lug
LI Hui1, CHEN Peng1, YAO Zekun2, NING Yongquan2
(1. AVIC The First Aircraft Institute, Xi’an 710089, China;
2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China )
Abstract：Titanium alloy is widely used in aviation, aerospace, marine and other fields for its high strength, good
corrosion resistance and high heat resistance. Lots of aircraft structures were manufactured by titanium alloys, such as the
pulley frame, hinge joint and the base structure, which relate to lug connection parts. In order to investigate the failure behavior
and optimize the geometric shape, the static-load tests were carried out on the titanium alloy lugs. The effect of lug
shape and loading method on the failure behavior has been studied, and K 0 and K con1 have been calculated. Meanwhile, typical
fracture mechanisms of the titanium alloy lugs were given in present research.
2017, 
