Optimization of the Cold Expansion Process for Titanium Holes | Zendy

Achard Victor | Zendy; Daidie Alain | Zendy; Paredes Manuel | Zendy; Chirol Clément | Zendy

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Optimization of the Cold Expansion Process for Titanium Holes

Author(s) -

Achard Victor,

Daidie Alain,

Paredes Manuel,

Chirol Clément

Publication year - 2017

Publication title -

advanced engineering materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.938

H-Index - 114

eISSN - 1527-2648

pISSN - 1438-1656

DOI - 10.1002/adem.201500626

Subject(s) - materials science , aerospace , homogeneity (statistics) , drilling , deep hole drilling , titanium alloy , titanium , residual stress , mechanical engineering , hole drilling method , expansion ratio , structural engineering , composite material , metallurgy , computer science , engineering , aerospace engineering , alloy , machine learning

Cold expansion of metallic holes is widely used in the aerospace industry for improving the fatigue performance of mechanical assemblies. To increase the efficiency of the process, it is worth considering the possibility of carrying out the expansion twice in succession in the same hole. This paper discusses the consequences of such an operation on a single titanium hole through a numerical and experimental study. More precisely, numerical modeling is developed in order to simulate cases where the expansion is carried out twice: in the same direction and in opposite directions. The residual fields are analyzed and the results compared with experimental results using incremental hole‐drilling technique. Results show that double expansion may have a very positive impact on the homogeneity of the compressive fields.

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