As part of the effort to meet the riveted joint
specification, and to improve overall cycle time, a significant focus of the development effort was paid to speeding up and improving efficiency of the fastening process.
Among the topics are the accumulation of fatigue damages for block-type loads with the use of material memory function, the influences of estimation methods of power spectral density function on the calculated fatigue life with the spectral method, monitoring the destruction process of material using a high-speed camera and a catodioptric stereo-vision system, shear strength testing of bonded joints of dental materials, and evaluating riveted joint
load-carrying capacity based on the formed rivet head dimension.
The chapters cover subjects such as structural design solutions and loading conditions for fuselage skin joins; relevance of laboratory test results for simple lap joining specimens to riveted joints
in a real structure; the effect of various production and design related variables on the riveted joint
fatigue behavior; theoretical and experimental analysis of secondary bending and its implications for riveted joint
fatigue performance; nucleation and shape development of fatigue cracks in riveted longitudinal lap joints; overview of experimental investigations into the multi-site damage for full-scale fuselage panels and riveted lap joint specimens; residual strength predictions for riveted lap joints in a fuselage structure.
pins and nylon washers between wings of pivot hinges are other quality signs.
In a largely different style of experiment involving the coated rivets and their galvanic interaction with surrounding magnesium, the scanning vibrating electrode technique (SVET) was employed, permitting an "in situ" determination of the coupling between any particular rivet and adjacent magnesium as might be encountered in an actual riveted joint
In a presentation to the International Council of Aeronautical Sciences last year, Christner reported that in side-by-side tests, friction stir welded joints had two or more times the static strength of a comparable yet conservatively designed riveted joint
Advanced investigations on a simplified modeling method of self-piercing riveted joints
for crash simulation, 11th LS-Dyna Forum, Ulm, 2012
Fatigue of self-piercing riveted joints
in aluminum alloy 6111," Int.
Her research was on fatigue in the riveted joints
of the fuselage of aircraft.
Among the topics are inertia friction welding for aerospace applications, hybrid laser-arc welding of aerospace and other materials, heat-affected zone cracking in welded nickel superalloys, quality control and non-destructive testing of self-piercing riveted joints
in aerospace and other applications, composite-to-metal bonding, and high-temperature brazing.
Moreover, in case of riveted joints
, contact between joint components should be taken into account.
Other areas explored are force analysis for single-point incremental forming, FEM modeling of self-piercing riveted joints
, aesthetic diode laser welding of stainless steel, the occurrence of humping in welding with highest beam qualities, and mechanical and laser micro deep drawing.