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Strong Magnetic Field Characterisation

Three magnetic field sources were characterised. The sources are needed experiments investigating interactions between hot gases from a detonation and the magnetic field.

Integrated Navigation, Guidance, and Control of Missile Systems: 2-D Dynamic Models

The models developed here are suitable for both conventional and more advanced optimal intelligent guidance, particularly those based on the 'game theory' guidance techniques.

Fatigue Crack Initiation from Pitting Introduced during the Anodising Process

This report presents examples of components from ADF aircraft that exhibited surface pitting which formed during the anodising pre-treatment process. In three of the examples, fatigue cracking had initiated from the surface pits leading to failure of the components.

Equivalent Crack Size Modelling of Corrosion Pitting in an AA7050-T7451 Aluminium Alloy and its Implications for Aircraft Structural Integrity

This report examines the research conducted on 7050-T7451 and how corrosion pitting could influence the fatigue life of components in RAAF aircraft manufactured from this alloy. The report shows that corrosion pitting causes not only a reduction in time to failure at a certain stress but also up to a 50% reduction in the fatigue threshold.

Development of a Thermal Wave Interferometry System for Thin-Film Characterisation

This report describes the development of a Thermal Wave Interferometry (TWI) system for the characterisation of film thickness. The system was shown to resolve variations in paint thickness of less than 1.5 μm

Globally Optimal Path Planning with Anisotropic Running Costs

The control-theoretic Ordered Upwind Methods (OUM) has been employed to solve a number of simple path planning problems.

An Assessment of the Usefulness of Water Tunnels for Aerodynamic Investigations

Water tunnels have some definite advantages over wind tunnels for aerodynamic testing of models. Water tunnels are generally better suited to carrying out fundamental research than they are for applied aerodynamics testing.

A Demonstration using Low-kt Fatigue Specimens of a Method for Predicting the Fatigue Behaviour of Corroded Aircraft Components

Development of a Monte Carlo model of the fatigue life of corroded specimens of aluminium alloy 7010-T7651. The model simulates both the alloy’s metallurgical inclusions and corrosion pits using extreme value statistical distributions.

Retrogression and Re-Ageing In-Service Demonstrator Reliability Trials: Stage III Component Test Report

Retrogression and Re-ageing (RRA) technology is a two stage heat treatment of 7075-T6 aluminium alloy used to improve corrosion resistance while retaining MIL-HDBK-5J structural properties. Trials demonstrated that the RRA process as defined in the Stage III Process Specification had a reliability in excess of 95%.

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