Failure assessment of armour grade tensile weld specimen: experimental, computational and analytical approach

Armour grade steel is high strength steel and it is used to build structures in defence applications. The weld zone of the armour weldment has lower tensile strength and deformation fracture in combat vehicles. In this study, experimental, computational, and analytical approaches are used to measure the failure assessment of tensile weld specimens. Tensile weld specimens are tested at strain rates of 0.1, 0.5, and 1 m/s and joint efficiencies of 56.2%, 61.2%, and 66.3%. Microstructures can be used to find a weld zone with different zones and ductile cracks in the fusion zone of tensile specimens. The computational approach of the Johnson Cook material model and the damaged material model is examined to assess the failure in the tensile test specimens with the help of different strain rates and temperatures. The analytical approach is used to calculate the stress, strain, and displacement values using safety applicable factors concerning tensile failure for armour grade steel, filler metal, and weld metal. According to MIL-STD-1185 standard, the different strain rates of tensile strength have been accepted within the range. The computational and analytical results are excellent methods for predicting tensile failure in armour weldments.