NPR rock bolt steel is a new type of reinforcing steel material, also known as negative Poisson's ratio. It possesses exceptional mechanical properties such as high constant resistance, large deformation, energy absorption, and impact and explosion resistance. Under tension, the material expands laterally within its elastic range; conversely, under compression, it contracts laterally. Traditional PR materials will break after reaching their ultimate load, while NPR structures can undergo large deformations without breaking after reaching a constant resistance value. Compared to PSB and HRB reinforcing bars, NPR rock bolt steel, due to its non-magnetic, high-strength, high-toughness, and highly uniform elongation characteristics, and its ability to adapt to large deformations, has broad application prospects in energy mines, transportation tunnels, earthquake-resistant buildings, and bridge engineering.

Time：26/06/2026 16:39:59

Answers

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