The optimization of manufacturing costs, weight and energy consumption of structures are at the center of concerns in the aerospace industry. In this context, industry orients their research towards the development of materials and manufacturing techniques. Among developing manufacturing techniques figure the brazing furnace. This is a manufacturing technique to assemble materials by means of a filler metal. This technique provides several assemblies simultaneously. The brazed assemblies are usually free of residual stresses that can have harmful effects on duty. Otherwise, a relief structure is necessary ensuring good performance in service. Based on the choice of materials, titanium alloys are a good choice because they have an excellent specific strength.
In this perspective aerospace manufacturer Turbomeca aims to develop brazed assemblies TA6V titanium alloy, which will be subject to complex dynamic loading. However, for the company does not have the necessary data to predict the fatigue life of the assemblies. A literature review revealed a lack of experimental data on fatigue of brazed joints in case of uniaxial loading and lack of data in case of complex loads. This research project aims to evaluate the fatigue of brazed joints TA6V subjected to complex loads, through numerical simulations on static loading, simple mechanical testing combined with multiaxial fatigue criteria. At the end of this work, it was demonstrated by the application of this methodology that brazed joint, in this case a T-joint obtained by brazing two Ti-6Al-4V sheets of 1.02 mm thick can withstand a local stress of 185 MPa.
| Date | 11 Jan 2017 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Philippe Bocher (Supervisor) & Vincent Demers (Co-supervisor) |
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Laqibi, Z. (Author),
Bocher (Supervisor) &
Demers (Co-supervisor),
11 Jan 2017Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering