In this tutorial, the dynamic failure of a bolt–steel plate joint is simulated in Abaqus. The upper and lower steel plates are modeled as three-dimensional solid parts. The bolts are also modeled as three-dimensional solid parts. A figure of the assembled parts is shown below.
Fracture in ductile metals can occur through two main mechanisms:
Ductile fracture caused by nucleation, growth, and coalescence of voids.
Shear fracture caused by shear band localization.
Based on experimental observations, these mechanisms require different criteria to predict the onset of damage.
The ductile criterion predicts damage due to void nucleation, growth, and coalescence.
The shear criterion predicts damage due to shear band localization.
Both criteria are applied in this simulation to study bolt failure. A dynamic explicit step with mass scaling is used to model the failure process. Surface-to-surface interactions are defined, including frictional properties. Fixed boundary conditions are applied to the sides of the bedplate, while a displacement with smooth amplitude is applied to the upper steel plate to introduce loading.
A fine mesh is required for accurate results. Therefore, the parts are partitioned to allow for high-quality meshing.
After running the simulation, results such as stress, strain, damage, failure, and displacement can be obtained. Figures of these results are provided below.
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