Failure Mode and Fatigue Behavior of Flow Drill Screw Joints in Lap-Shear Specimens of Aluminum 6082-T6 Sheets of Different Thicknesses

Paper #:
  • 2018-01-1239

Published:
  • 2018-04-03
Abstract:
Failure mode and fatigue behavior of flow drill screw (FDS) joints in lap-shear specimens of aluminum 6082-T6 sheets of different thicknesses are investigated based on the experimental results and a structural stress fatigue life estimation model. Lap-shear specimens of different thicknesses with FDS joints with clearance hole were made and tested under quasi-static and cyclic loading conditions. Optical micrographs show that the failure modes of the FDS joints with clearance hole in lap-shear specimens of different thicknesses are different under quasi-static loading conditions. Optical micrographs show that the failure modes of the FDS joints with clearance hole in lap-shear specimens of different thicknesses are also slightly different under cyclic loading conditions. A structural stress fatigue life estimation model is adopted to estimate the fatigue lives of the FDS joints with clearance hole in lap-shear specimens. The general trends of the fatigue life estimations are in agreement with those of the experimental results.
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