TY - JOUR
T1 - Effects of bolt torque tightening on the strength and fatigue life of airframe FRP laminate bolted joints
AU - Giannopoulos, Ioannis K.
AU - Doroni-Dawes, Damian
AU - Kourousis, Kyriakos I.
AU - Yasaee, Mehdi
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/9/15
Y1 - 2017/9/15
N2 - The experimental study presented herein, investigated the effects of bolt torque tightening on the strength and fatigue design of bolted AS7/8552 fibre reinforced polymer laminates. Damage initiation and final failure manifestation on the joints was investigated and presented using optical microscopy. Subsequent experimental result analysis explored the application domain of bolted joints within the airframe design sector, bound by the current airworthiness certification requirements and expected airframe design life. The reasons for the static strength of the joint laminates or the fatigue failure of the bolt being the main design drivers for the tested joints were highlighted. The study concluded with comments and suggestions on the application of bolt torque tightening in relation to the strength, fatigue life and damage tolerance characteristics of joints on similar fibre reinforced polymer laminate composite material systems.
AB - The experimental study presented herein, investigated the effects of bolt torque tightening on the strength and fatigue design of bolted AS7/8552 fibre reinforced polymer laminates. Damage initiation and final failure manifestation on the joints was investigated and presented using optical microscopy. Subsequent experimental result analysis explored the application domain of bolted joints within the airframe design sector, bound by the current airworthiness certification requirements and expected airframe design life. The reasons for the static strength of the joint laminates or the fatigue failure of the bolt being the main design drivers for the tested joints were highlighted. The study concluded with comments and suggestions on the application of bolt torque tightening in relation to the strength, fatigue life and damage tolerance characteristics of joints on similar fibre reinforced polymer laminate composite material systems.
KW - Fatigue
KW - Fracture
KW - Mechanical testing
KW - Optical microscopy
KW - Strength
UR - http://www.scopus.com/inward/record.url?scp=85019713099&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2017.05.059
DO - 10.1016/j.compositesb.2017.05.059
M3 - Article
AN - SCOPUS:85019713099
SN - 1359-8368
VL - 125
SP - 19
EP - 26
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -