Some aspects of the energy based approach to fatigue crack propagation

Energetic approach to study the plastic behaviour in CT specimens

“…In fact, the twice per loading cycle temperature variation is correlated to the energy of irreversible processes, so that it can be used for describing the crack propagation. A relation between da/dN and energy is possible, in fact, other authors found and verified the model between the dissipated hysteretic energy per cycle in place and crack growth rate [14].…”

“…Further works will be focused on the determination of the heat dissipated per cycle at the crack tip by considering calibrated temperature data in order to verify the analytical and numerical models present in literature [14], [19]. th Quantitative InfraRed Thermography Conference, 25 -29 June 2018, Berlin, Germany 8 Fig.…”

“…In the specific field of fracture mechanics, a temperature rise is detected in the plastic zone around the crack tip where the plastic volume dissipates energy [9][10][11][12]. Therefore, thermography represents a valid tool to localise the crack tip that is important for both determining in experimental way, the Paris Law [13] as well as fatigue crack propagation [14].…”

“…Other approaches [14], [19], the dissipated energy at the crack tip was be directly related to hysteresis loop [20], and a Paris' law based on these measurements was determined in the Klingbeil's [19] approach.…”

Numerical evaluation of Paris-regime crack growth rate based on plastically dissipated energy

“…To the knowledge of the authors, there is no suitable experimental data establishing W p cr , but is an area of active ongoing research [16]. In this work, W p cr is determined by using one set of experimentally measured data (DK; da=dN) obtained from Ref.…”