Adaptive Finite Element Methods for Unsteady Lubricated Metal Forming Processes

9300675刘，西北大学的一名研究生将得到支持，为金属成形过程的设计和快速原型设计开发自适应多尺度方法。将发展基于任意拉格朗日-欧拉(ALE)有限元、自适应网格展开技术、多尺度方法和流体动力润滑有限元的金属成形过程计算机模拟方法。特别是，计划通过包括润滑剂流动、压力梯度、薄膜夹带、表面粗糙度和滑动的影响来强调刀具和金属工件之间的相互作用。这将为接触、润滑和摩擦应力提供更逼真的建模。在研究计划中，这些方面将结合金属成形过程的计算机模拟进行研究。模拟结果将与现有的实验数据进行比较，以帮助验证和改进理论模型。

9300675 Liu One graduate student at Northwestern University will be supported to develop adaptive multiple scale methods for the design and rapid prototyping of metal forming processes is requested. Computer simulation methods for metal forming processes based on Arbitrary Lagrangian-Eulerian (ALE) finite elements, adaptive mesh deployment techniques, multiple-scale methods, and hydrodynamic lubrication finite elements will be developed. In particular it is planned to emphasize the interaction of the tool and mental work piece by including the effects of lubricant flow, pressure gradient, film entraiment, surface roughness and sliding. This will provide a more realistic modeling of contact, lubrication, and frictional stresses. In the research program, these aspects will be studied in conjuction with computer simulation of metal forming processes. Simulation results will be compared with available experimental data to help validate and improve the theoretical models.