What question did this study set out to answer?

This study aims to investigate the dynamic tensile behaviour of G12.9 high-strength steel bolts exposed to elevated temperatures.

Dynamic tensile behaviour of high-strength steel bolt coupons after elevated temperature exposure

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Experimental study investigates the dynamic response of high-strength steel bolts after fire exposure, indicating potential safety concerns.

This study aims to investigate the dynamic tensile behaviour of G12.9 high-strength steel bolts exposed to elevated temperatures.
Conducted comprehensive experiments on G12.9 high-strength steel bolts after exposure to temperatures ranging from 20 °C to 800 °C.
Tested bolts at varying strain rates from 0.00025 s −1 to 10 2 s −1 to assess dynamic stress-strain response.
Developed a dynamic constitutive model considering strain rate effects.
No significant difference in strain-rate sensitivity up to 400 °C exposure temperature.
Reduction in strength and increased strain-rate sensitivity observed at temperatures above 400 °C.
Dynamic constitutive model allows for better resilience assessments of structural performance post-fire and impact.

Zhu et al. (2026) studied this question.

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Experimental study investigates the dynamic response of high-strength steel bolts after fire exposure, indicating potential safety concerns.