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A comparative numerical study of combined cold expansion and local torsion on fastener holes

journal contribution
posted on 2012-10-01, 00:00 authored by A H Shamdani, Shahin Khoddam
Cold expansion and local torsion processes provide controllable strengthening mechanisms for a fastener hole and therefore have engineering significance. They rely on the residual stress and the accumulated shearing strain, respectively, which are difficult to measure. Due to the complex closed form solutions for these mechanisms, their numerical study is of great importance. In this work, a combination of the cold expansion and the local torsion on a fastener hole has been investigated numerically to evaluate the amount and nature of the total accumulated residual stresses around a fastener hole. Different cases of the cold expansion and the local torsion processes were modelled and studied by finite element simulation to investigate the existence of a loading case which produces a beneficial compressive residual stress field in the vicinity of a hole. Sensitivity of the final residual stress with respect to a range of process parameters including adequate diametral interference and angle of rotation was investigated.

History

Journal

Fatigue and Fracture of Engineering Materials and Structures

Volume

35

Issue

10

Pagination

918 - 928

Publisher

Wiley-Blackwell Publishing

Location

Chichester, Eng.

ISSN

8756-758X

eISSN

1460-2695

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2012, Wiley Publishing