In this paper the fatigue phenomena of 2024 T3 alumium alloy were studied in terms of calorimetric and thermal effects during uniaxial cyclic loading. Thermoelastic coupling sources and dissipation were separately estimated by using infrared thermal data and a local simplified form of the heat equation. The simplifications are essentially based on the assumption that the uniaxial fatigue test remains homogeneous until a macroscopic fatigue crack occurs within the gauge section of the specimen. Heat sources were then compared to predictions derived from mechanical data by assuming a linear isotropic thermoelastic behaviour of the material and by neglectiong the influence of thermomechanical couplings on the hysteresis area of fatigue cycles.
Analysis of thermoelastic and dissipative effects related to the fatigue of 2024 T3 aluminium alloy
MORABITO, Anna;DATTOMA, Vito;
2004-01-01
Abstract
In this paper the fatigue phenomena of 2024 T3 alumium alloy were studied in terms of calorimetric and thermal effects during uniaxial cyclic loading. Thermoelastic coupling sources and dissipation were separately estimated by using infrared thermal data and a local simplified form of the heat equation. The simplifications are essentially based on the assumption that the uniaxial fatigue test remains homogeneous until a macroscopic fatigue crack occurs within the gauge section of the specimen. Heat sources were then compared to predictions derived from mechanical data by assuming a linear isotropic thermoelastic behaviour of the material and by neglectiong the influence of thermomechanical couplings on the hysteresis area of fatigue cycles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
