Prediction of fatigue life of aluminum 2024-T3 at low temperature by finite element analysis

Abstract

The change in material properties at low temperature has always been one of the concerned design factors in aircraft industries. The wings and fuselage are repeatedly exposed to sub zero temperature during cruising at high altitude. In this study, fatigue tests were conducted on standard flat specimens of aluminum 2024-T3 at room temperature and at -30 °C. The monotonic and cyclic loading tests were conducted using MTS 810 servo hydraulic machine equipped with a cooling chamber. The monotonic tests were conducted at a crosshead speed rate of 1 mm/min and the cyclic tests at a frequency of 10 Hz with a load ratio of 0.1. The experimental data obtained, such as the yield strength, ultimate strength and S-N curve were used as the input parameters in ANSYS Workbench 16.1. This close agreement demonstrates that the isotropic model in ANSYS workbench is essential in predicting fatigue life. The increase in stress parameter causes fatigue life to decrease. Besides, the decrease in temperature causes the total fatigue life to increase.

Effectiveness of Nanotechnology Treatments in Composite Aircraft Applications

“…where A, B, C, D, E are specific constants which in the particular case of Al2023-T3 assume the values: A = 12.81; B = 3.36; C = 0.68; D = 158.96; E = 0.75 [16,17]. From Equation ( 1) and for all three load types, it is possible to obtain the global k t value obtained during the test as:…”

Experimental and numerical characterization of fatigue crack propagation in high-speed railway wheel ER8 steel

“…In the recent years, FE simulations have been widely applied to demonstrate different crack developments in alloys under various loading conditions. Mazlan et al [7] performed FE simulations for predicting fatigue life of aluminum sheet grade 2024-T3 at low temperatures, in which yield strength, ultimate strength and S-N curve were used as the material input parameters. Martinez et al [8] investigated fretting fatigue crack propagation of a railway axle subjected to bending load.…”