Strain Rate Sensitivity of Low Carbon Threaded Steel Rods of Grade 4.6
Author Information
Author(s): Trajkovski Jovan, Kunc Robert, Kovacheva Daniela
Primary Institution: Chair of Modelling in Engineering Sciences and Medicine, Faculty of Mechanical Engineering, University of Ljubljana
Hypothesis
The study investigates the performance of low-strength M6 threaded rods of the 4.6 strength class under different strain rates.
Conclusion
The study found that the planned failure of bolts in steel safety barriers is crucial for safety, and the Cowper–Symonds model parameters derived from the tests enable realistic simulations of bolt behavior under dynamic loading.
Supporting Evidence
- The study highlights the importance of planned bolt failure in steel safety barriers for traffic safety.
- True stress-strain data were generated through image-based measurement of specimen deformation.
- Cowper–Symonds model parameters were derived to enable realistic simulations of threaded rod behavior.
- The validation study confirmed the robustness of the model for broader applications in structural safety assessments.
Takeaway
The researchers tested some steel rods to see how they break when pulled at different speeds, which helps make roads safer.
Methodology
Uniaxial tensile tests were performed on M6 threaded rods at various strain rates, and true stress-strain curves were constructed using video analysis.
Limitations
Material parameters were obtained using limited experimental data under relatively low strain rates, suggesting further investigation is needed for higher strain rates.
Digital Object Identifier (DOI)
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