stillingsbetegnelse:
PhD Position in Early application of tolerance design

jobbeskrivelse:
The Department of Mechanical Engineering (MEK) of the Technical University of Denmark (DTU) has an open PhD position focusing on Early application of tolerance design in collaboration with Novo Nordisk. The project is part of the DTU-Novo Nordisk Robust Design consisting of one associate professor, one post doc, PhD students (one now completed) and two research assistants. Responsibilities and tasks Production companies continuously strive to develop high quality products that consistently meet user expectations. The process for developing these products is often based on a stage-gate model consisting of phases which each have a specific focus, e.g. idea generation, conceptualization, embodiment, detailed design, and production ramp-up. In each phase, a variety of solutions are proposed, evaluated and selected for being brought forward to the next development phase. An important aspect in the evaluation process is ‘tolerance analysis’, which is a means for analysing how the functional performance of the product is affected by variation from e.g. manufacturing, assembly and use conditions. This is especially important for functions which are key to the overall product functionality and safety of the product. In recent decades, the field of tolerance analysis (or variation management as it is sometimes referred to) has been augmented with complex analysis tools such as Monte Carlo simulations, Geometrical Product Specifications, Statistical Process Control, and Process Capability Databases. Furthermore, the use of 3D-CAD software has led to the introduction of complex analysis software such as CETOL and Sigmund. Despite these advances, the experience in industry is that tolerance analysis is either not carried out or carried out as a late-stage activity to validate and fine-tune the selected design solutions, rather than playing a pro-active role in designing, evaluating, selecting and optimising designs. As a consequence, solutions which are sensitive to variation are discovered late in the development process, and in some cases, not until the product is in production. In other words, the trend has been towards increased precision and the ability to analyse complex designs and away from simple calculations carried out by the engineering designer at the point of design. There is therefore a real need for developing tools and methods for simple, early stage tolerance analysis that can support the inherent nature of early-stage development, including fast iterations, multiple proposed solutions and lack of full information (e.g. process capability data). The new approach should help to support and prioritise tolerance analysis activities in a systematic manner, such that key performance characteristics are identified and given higher priority. Finally, influences and disturbances other than just dimensional variation from part manufacture must be considered. In order to take product robustness to the next level, tolerance analysis must include considerations related to variation in material properties, in assembly fixtures and operations, ambient conditions, time related variations such as mechanical creep, plasticising, corrosion, as well as external and internal loads. Project Description The first part of the project will be to conduct a review of literature and industrial best practice (interviews and observations from industrial use of tolerance analysis). The review will determine the state of the art, forming a categorisation of available techniques, including the benefits of each as well as the gaps in knowledge and projected future developments. Outputs: •Journal Paper review of state of the art. •Presentation of the current possibilities with an example use of each on a Novo Nordisk part/product. Following the initial review will be a re-scoping phase looks to re-evaluate the feasibility, the novelty and the importance of the main and sub-projects listed below. The criteria for their prioritisation and choice are

Arbejdsgiver Navn: Danmarks Tekniske Universitet

Arbejdsgiver telefonnummer: 45252525

Arbejdsgiver faxnummer: 45881799

Job kort beskrivelse:
Undervisning og forskning på universiteter og højere læreranstalter

land: Danmark

region: Hovedstaden

krævede uddannelse: Ikke angivet

Kilde til jobtilbud: AMS, Offentlige arbejdsformidlinger, Danmark