학술논문
Hybrid experimental and computational approach for rate dependent mechanical properties using indentation techniques
Document Type
Conference
Author
Source
EuroSimE 2005. Proceedings of the 6th International Conference on Thermal, Mechanial and Multi-Physics Simulation and Experiments in Micro-Electronics and Micro-Systems, 2005. Thermal mechanical and multi-physics simulation and experiments in micro-electronics and micro-syste Thermal, Mechanical and Multi-Physics Simulation and Experiments in Micro-Electronics and Micro-Systems, 2005. EuroSimE 2005. Proceedings of the 6th International Conference on. :510-514 2005
Subject
Language
Abstract
This paper introduces a hybrid test methodology, based on dynamic indentation, to determine the high strain rate properties of materials. A conical indentation test setup, with real time measurement of load and indent depth, is developed for this purpose. Tests are conducted to obtain the load displacement (P-h) curves at different loading rates. Non-linear dynamic finite element analysis (FEA), using an iterative inverse solution technique, is used to convert the experimental data into stress-strain curves at different strain rates. The inverse solution technique involves varying the stress-strain curves until the load-displacement curves obtained from simulation matches the experimentally measured data. Results indicate that the uni-axial dynamic characterization tests under-predict the material properties of the specimen, when compared to the indentation tests. This is important for the characterization of materials that experience localized plasticity; eg. Structures subjected to drop and impact.