Numerical analysis and efficient implementation of complex FE-models for mechanical production processes using the example of deep hole drilling

机械制造过程的建模通常会导致复杂的非线性问题公式，其中包括各种固体之间的摩擦接触以及温度和变形等多个物理量的耦合。用有限元法对它们进行离散化，导致离散问题庞大而难以求解。为了在适当的运行时间内进行足够准确的模拟，利用各种方法来减少未知数的数量和所需的计算时间。在本研究项目的框架内，网格和trialspace自适应技术被认为是在特定的深孔钻削过程的情况下。除此之外，重点是调整的解决方法的代数系统的发展和有效的实施所提到的技术，通过“高性能计算”。前两个阶段的工作主要集中在深孔钻削过程的短时过程模拟上。由于工件复杂性的增加，上述提高效率的技术在长时间过程模拟中的应用就显得尤为突出。

The modelling of mechanical manufacturing processes usually leads to complex nonlinear problem formulations, which include the frictional contact between various solids as well as the coupling of several physical quantities like temperature and deformation. Their discretization by means of the FEM leads to huge and difficult to solve discrete problems. To carry out sufficiently accurate simulations in an apropriate run-time, various methods are utilized that reduce both the number of unknowns and the required computing time. Within the framework of this research project mesh-, and trialspace-adaptive techniques are considered in case of the specific deep-hole drilling process. Beyond that the focus is on the development of adjusted solving methods for the algebraic system and the efficient implementation of the mentioned techniques by means of "High-Performance-Computing" . In the first two phases, the work was concentrated on the short time process simulation of the deep-hole drilling process. Because of the increased workpiece complexity, the application of the above mentioned efficiency enhancing techniques to the long time process simulation comes to the fore.