Modification of the Johnson–Cook Material Model for Improved Simulation of Hard Milling High-Performance Steel Components

Understanding the effect of thermomechanical loads during finish cutting processes, in our case hard milling, on surface integrity workpiece is crucial for creation defined quality characteristics high-performance components. Compared to computationally generated modifications by simulation, measurement-based determination material can only be carried out selectively and a point-by-point basis. In practice, however, detailed knowledge changes properties at arbitrary points component great interest. this paper, modification well-known Johnson–Cook model using finite element software Abaqus presented. Special attention was paid kinematic hardening behavior used steel material. Cyclic are relevant chip formation simulation because, after each cut, under loaded plastically several times not necessarily same direction. Therefore, analogy, multiple bending investigated samples made 42CrMo4. A pronounced Bauschinger observed tests. An adaptation results tests possible limited extent without hardening, which why supplemented Armstrong–Frederick approach. The modified Johnson–Cook–Armstrong–Frederick developed practical use as VUMAT verified use.