| dc.contributor.author | Muiruri, Amos | |
| dc.contributor.author | Maringa, Maina | |
| dc.contributor.author | Du Preez, Willie | |
| dc.date.accessioned | 2025-10-25T20:45:35Z | |
| dc.date.available | 2025-10-25T20:45:35Z | |
| dc.date.issued | 2023 | |
| dc.identifier.citation | Muiruri, A.; Maringa, M.; du Preez,W. Numerical Simulation of the Taylor Impact Test for Laser Powder Bed Fusion Parts Based on Microstructural Internal State Variables. Appl. Sci. 2023, 13, 5372. https://doi.org/10.3390/app13095372 | en_US |
| dc.identifier.uri | https://doi.org/10.3390/app13095372 | |
| dc.identifier.uri | http://repository.mut.ac.ke:8080/xmlui/handle/123456789/6700 | |
| dc.description.abstract | The response of any engineering design components to stresses should be predictable,
While the response of a material to complex loading, such as high strain rates experienced during
service, is difficult to represent with simple tests, the Taylor impact test is one of a number of tests
devised for high strain rate complex loading. To expedite the acceptance of LPBF Ti6Al4V (ELI) for
use in demanding structural applications, there is a need to develop numerical models based on the
internal microstructural state variables to predict the performance of the alloy over a wide range of
high strain rates using such complex tests. This paper documents the numerical simulation of Taylor
impact tests for direct metal laser-sintered and post-processed Ti6Al4V (ELI—Extra Low Interstitial)
alloy. A microstructural variable-based constitutive model was used to predict the mechanical
properties (stresses and evolution of plastic strains) of the material. The corresponding material
parameters of the model were based on the specific microstructure obtained upon post-process heat
treatment. The model was first implemented as a user material subroutine in the explicit finite
element program ABAQUS using the VUHARD subroutine. Subsequently, the symmetrical Taylor
impact tests of Laser Powder Bed Fusion (LPBF) Ti6Al4V (ELI) parts were numerically simulated
using the VUHARD subroutine at different impact velocities. The equivalent von Mises stress and
plastic strain obtained from numerical simulations were compared with the analytical solutions based
on the strain rates obtained. It was shown that the instantaneous and average absolute errors between
the numerical and analytical values of the model were generally less than 5%. The mushroom end,
commonly observed in a Taylor test specimen, was also seen in the numerical model. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Applied sciences | en_US |
| dc.subject | Ti6Al4V (ELI); subroutine; VUHARD; ABAQUS; high strain rate; simulation | en_US |
| dc.title | Numerical Simulation of the Taylor Impact Test for Laser Powder Bed Fusion Parts Based on Microstructural Internal State Variables | en_US |
| dc.type | Article | en_US |
