Mechanical properties of aircraft materials subjected to long periods of service usage

Article Abstract:

Several tests were performed on an aircraft's aluminum alloy materials to determine the effects of long periods of service usage on their mechanical properties. The 2024-T3, 7075-T6 and 7178-T6 aluminum alloys were tested for their tensile stress-strain, cyclic stress life and fatigue crack growth. Results have shown that most of the alloy's mechanical properties resulting from long periods of service usage agree with those found in handbooks for virgin material of the same pedigree.

Research, Aluminum alloys, Strength of materials, Strength (Materials), Airplanes

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A finite element analysis of the effect of hardening rules on the indentation test

Article Abstract:

An experiment was conducted to determine the effect of isotropic and kinematic hardening on the depth load relation due to spherical indentation. The finite element method was used to analyze the indentation of an elastic-plastic material. Results revealed that kinematic hardening causes hysteresis loops during a cyclic process and the formation of these loops is similar in linear and non-linear hardening responses.

Usage, Testing, Surface hardening, Viscosity, Finite element method, Materials testing

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Analysis of shadow mask tension subjected to thermal and mechanical loads

Article Abstract:

A heat cycle analysis and creep tests are conducted to analyze the changes to the tension in the shadow mask. In cathode ray tubes, a tension is imposed into the shadow mask during manufacturing to avoid slight variations in the position due to in service temperatures or deformation.

Electron Tube Manufacturing, Electron tubes, CRT Tubes, Cathode ray tubes

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