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The Synthetic Description of the Results, Scientific Achievements and Practical Applications of the Eureka − Imperja Project, E3496! − “Improving the Fatigue Performance of Riveted Joints in Airframes”

Kaniowski J.

Fatigue of Aircraft Structures

2012

Iss. 4

38--57

The goal of the project was to increase the fatigue life of the riveted joints in order to achieve an increase in the aircraft service life, a smaller number of inspections and, consequently, lower aircraft operating costs. This goal was achieved by the analysis and optimization of the riveting process as well as by improving the fatigue life prediction methods (crack initiation and propagation). The project outcomes enable a more precise fatigue life estimation and an increase in Time Before Overhaul (TBO) for currently used aircraft, as well as optimize the design of new aircraft from the fatigue point of view.

Inelastic properties of materials, energy dissipation and fatigue life estimation under uniaxial and multiaxial stress

Vesselinov K.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2001

Vol. 269, z. 67

383-398

Energy approach to fatigue life estimation under combined tension with torsion

Łagoda T., Macha E.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2001

Vol. 269, z. 67

163-182

The paper concerns application of the energy parameter, being a sum of the elastic and plastic strain energy density in the critical plane, for description of experimental data obtained from the fatigue tests of 35NCD16 steel, GGG40 and GGG60 cast irons subjected to constant amplitude cyclic tension-compression, torsion and variable-amplitude tension-compression, torsion and combined tension with torsion. It has been shown that the parameter of specific work of selected stress on selected strains in the critical plane is an efficient parameter expressing the fatigue life of analysed materials under the considered kinds of loading. The critical plane is the plane where the parameter of normal strain energy density reaches its maximum.