Numerical analysis of the effect of weld-induced residual stress and plastic damage on the ballistic performance of welded steel plate
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Date
2012-06-01
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The current paper presents numerical analyses that elucidate the effects of post-weld residual stress and associated plastic damage on the ballistic performance of 316L austenitic steel plate. Impact simulations of an 18 mm thick plate with a centreline three-pass slot weld by hemispherical-nosed and flat-nosed projectiles are performed, with initial velocities in the range of 300-800 m/s. The numerical framework consists of three interdependent stages: (i) a weld model was developed in Abaqus/Standard and validated using two independent experimental data sets; (ii) a Johnson-Cook material model is calibrated and validated along with the shear failure fracture criterion available in Abaqus/Explicit for impact models; and (iii) the weld modelling results were transferred to an impact model built in Abaqus/Explicit, which employs the validated material and fracture models to predict the ballistic performance of welded plate. It is shown that the associated plastic strain damage accumulated during the welding process - and its distribution - has an adverse effect on the ballistic performance. It has also been determined that a fracture criterion that accounts for pre-existing damage in the weldment must be used for accurate impact analyses of welded structures. Crown Copyright (C) 2012 Published by Elsevier B.V.
Description
Keywords
Numerical analysis, Residual stresses, Plates, Welded joints, Shear properties, Projectiles
Citation
Flores-Johnson, E. A., Muransky, O., Hamelin, C. J., Bendeich, P. J., & Edwards, L. (2012). Numerical analysis of the effect of weld-induced residual stress and plastic damage on the ballistic performance of welded steel plate. Computational Materials Science, 58, 131-139. doi:10.1016/j.commatsci.2012.02.009