Effect of socket depth on failure type of fasteners

Tanrikulu B., Toparli M. B., Kilincdemir E., Yurtdas S., Ince U.

22nd European Conference on Fracture (ECF) - Loading and Environmental Effects on Structural Integrity, Belgrade, Sırbistan, 26 - 31 Ağustos 2018, cilt.13, ss.1840-1844 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 13
  • Doi Numarası: 10.1016/j.prostr.2018.12.331
  • Basıldığı Şehir: Belgrade
  • Basıldığı Ülke: Sırbistan
  • Sayfa Sayıları: ss.1840-1844
  • Anahtar Kelimeler: Fastener, socket depth, failure, weight reduction, BOLT
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

In this study, the effect of socket depth on failure types of fasteners were investigated in detail. Socket depth plays a vital role in structural integrity of fasteners particularly in weight reduction studies. Therefore, experimental studies were carried out by cold forged bolts having various socket depths. Fatigue and torque-tension tests were conducted to examine the critical socket depths under different loading types. Finite element analysis were also performed using SIMUFACT FORMING software. According to experimental and numerical investigations, it was shown that the socket depth has significant influence on failure mechanism of fasteners. Depending on the depth of sockets, the locations of the failures were shifted from the threads to the head of fasteners. The main reason for this type of shift was associated with the higher stress levels due to decrease in cross-sectional area of fastener heads. Consequently, it was shown that the critical socket depth is very important parameter in terms of structural integrity of fasteners and it has to be taken into account in the design stage of the every fasteners. (C) 2018 The Authors. Published by Elsevier B.V.