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Comperative Study of Objective Stress Rates
A wide array of objective stress rates are available in the literature. This projects concerns it self with preparing comparative simulations regarding a number of these stress rates using our in house meshless solver.
Keywords: meshless methods, computational science, high performance computing, particle methods, simulation, metal cutting, scientific computing, meshfree methods, continuum mechanics
Metal cutting is a very involved process. Large deformations, high temperature gradients and extreme
strain rates are encountered. Thus, the simulation of metal cutting remains an active area of research.
In fact, a state of the art meshless metal cutting solver is developed at IWF. Since metal cutting simulations exhibit large deformations an objective stress rate has to be used. A wide array of such stress rates are available in the literature. This project is concerned with using our meshless solver to do some comparative studies regarding these stress rates.
**Challenges**
Since the objective stress rate is not well defined there is no “right” one. Understanding their different advantages and disadvantages requires a solid understanding of tensor algebra. Interpretation of results can be challenging. Our in house software has no user interface, setting up simulations requires manipulation of source code. This student thesis can be extended to a bachelor thesis if the student is ready to implement additional objective stress rates.
**Tasks**
- Literature review on objective stress rates
- Identification of benchmark problems
- Running simulations and write up report
**Requirements**
- Motivated, creative and autonomous student
- Interest in continuum mechanics
- Some programming skills beneficial (preferably C/C++)
Metal cutting is a very involved process. Large deformations, high temperature gradients and extreme strain rates are encountered. Thus, the simulation of metal cutting remains an active area of research. In fact, a state of the art meshless metal cutting solver is developed at IWF. Since metal cutting simulations exhibit large deformations an objective stress rate has to be used. A wide array of such stress rates are available in the literature. This project is concerned with using our meshless solver to do some comparative studies regarding these stress rates.
**Challenges** Since the objective stress rate is not well defined there is no “right” one. Understanding their different advantages and disadvantages requires a solid understanding of tensor algebra. Interpretation of results can be challenging. Our in house software has no user interface, setting up simulations requires manipulation of source code. This student thesis can be extended to a bachelor thesis if the student is ready to implement additional objective stress rates.
**Tasks**
- Literature review on objective stress rates
- Identification of benchmark problems
- Running simulations and write up report
**Requirements**
- Motivated, creative and autonomous student
- Interest in continuum mechanics
- Some programming skills beneficial (preferably C/C++)