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Nonlinear time- and temperature-dependent mechanical modelling of precious metal alloys for fibreglass production
The goal of this thesis is to develop and implement a model for the nonlinear time- and temperature-dependent mechanical response of platinum-rhodium alloys into the structural simulation of glass re-melt bushings to be used for hybrid fibre production and subjected to frequent heating/cooling cycles.
Antefil enables manufacturers of fibre-reinforced plastic structures to exploit more efficient processes by providing affordable and sustainable high-quality preforms made from hybrid fibres - even at large scale.
**Motivation**
Antefil is developing a scaled pilot plant for hybrid fibre production based on the methods developed at CMASLab. This is based on glass re-melt spinning, which involves the melting of glass in a so-called bushing made from precious metals. This component is heated to temperatures above 1000°C and is thus subjected to enourmous expansion/contraction cycles when used in an ever-changing prototype or pilot process. It is therefore important to understand the influence of material behaviour and structural design on the durability of bushings used in such settings.
Antefil enables manufacturers of fibre-reinforced plastic structures to exploit more efficient processes by providing affordable and sustainable high-quality preforms made from hybrid fibres - even at large scale.
**Motivation** Antefil is developing a scaled pilot plant for hybrid fibre production based on the methods developed at CMASLab. This is based on glass re-melt spinning, which involves the melting of glass in a so-called bushing made from precious metals. This component is heated to temperatures above 1000°C and is thus subjected to enourmous expansion/contraction cycles when used in an ever-changing prototype or pilot process. It is therefore important to understand the influence of material behaviour and structural design on the durability of bushings used in such settings.
The goal of this thesis is to develop and implement a model for the nonlinear time- and temperature-dependent mechanical response of platinum-rhodium alloys into the structural simulation of glass re-melt bushings to be used for hybrid fibre production and subjected to frequent heating/cooling cycles. This includes the development of a robust numerical simulation tool able to capture temperature-dependent viscoelasticity and hardening effects. Using this tool to simulate cyclic thermal stressing of a given structural design would allow the investigation of excessive deformation or stressing to judge its durability. The robustness of the computational tool shall be tested on the case of an existing bushing and, if time permits, be employed to investigate various scaled designs.
The goal of this thesis is to develop and implement a model for the nonlinear time- and temperature-dependent mechanical response of platinum-rhodium alloys into the structural simulation of glass re-melt bushings to be used for hybrid fibre production and subjected to frequent heating/cooling cycles. This includes the development of a robust numerical simulation tool able to capture temperature-dependent viscoelasticity and hardening effects. Using this tool to simulate cyclic thermal stressing of a given structural design would allow the investigation of excessive deformation or stressing to judge its durability. The robustness of the computational tool shall be tested on the case of an existing bushing and, if time permits, be employed to investigate various scaled designs.
Christoph Schneeberger
CLA E 32.2, Tannenstrasse 3
8092 Zurich, Switzerland
cschneeb@ethz.ch
Christoph Schneeberger CLA E 32.2, Tannenstrasse 3 8092 Zurich, Switzerland cschneeb@ethz.ch