Simulation of kinematic hardening model for carbon steel AISI 1035 weld stress prediction during the welding assembly of a railcar.
Daniyan, Ilesanmi Mpofu, Khumbulani Fameso, Festus Ale, Felix
Daniyan, Ilesanmi
Mpofu, Khumbulani
Fameso, Festus
Ale, Felix
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Abstract
The modelling and dynamic simulation of the welding process and material’s behaviour under different loading and unloading conditions of the thermal, stress and strain is important in order to determine the effect of heat and stress distributions as well as the sustainability of the overall process. This work presents the simulation of kinematic hardening model for AISI 1035 weld stress prediction during the welding assembly of the lower brackets of a railcar. A simplified modelling and simulation of kinematic hardening for AISI 1035 weld stress prediction was carried out using the commercial software code ABAQUS ® Complete Abaqus Environment (CAE) 2017 edition. A combination of the coupled thermal-displacement and static general steps for thermal and mechanical analysis were employed in the Abaqus Standard Implicit module. The weld zone was loaded with the heat flux corresponding to a weld temperature of 900 °C in the thermal step and then propagated into the mechanical loading step where a load of 5 kN was impacted on the top of the weld zone within a step time of 15 milliseconds. The results obtained indicated that the maximum stress from the Von Mises stress exceeds the yield strength of the material. This points to the fact that the material will deform plastically under the application of stress. Beyond this point is the strain hardening point where the material is strengthened by plastic deformation. The findings of this work will assist manufacturers to address the issue of sustainability in terms of the process economics, social and the environmental impacts of the welding process from the design phase.
Description
53rd CIRP Conference on Manufacturing Systems.
Date
2020-01-01
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Publisher
Elsevier
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Keywords
Kinematic model, Modelling, Simulation, Strain hardening, Stress