Mechanical Properties of Polyurethane Materials of Different Thicknesses under Impact Loading

Yibo Chen

doi:10.54691/hbp3d135

Authors

Yibo Chen

DOI:

https://doi.org/10.54691/hbp3d135

Keywords:

Ultra-high Performance Concrete, Seismic Performance, Low-cycle Repeated Loading, Numerical Simulation.

Abstract

To investigate the mechanical response patterns of polyurethane materials with varying thicknesses under impact loading and clarify the influence mechanism of thickness on their impact resistance, dynamic compression tests were conducted on polyurethane specimens with thicknesses of 5 mm, 10 mm, 15 mm, 20 mm, and 25 mm using a Separated Hopkinson Pressed Bar (SHPB) test apparatus under an impact pressure of 0.4 MPa. The study revealed that peak stress initially decreased continuously with increasing thickness, reaching a minimum at 20 mm before slightly rebounding. Peak strain exhibited a monotonically increasing trend with thickness. Elastic modulus decreased significantly with thickness, showing a cumulative reduction of 92.5% within the 5–25 mm thickness range. This study reveals the correlation between thickness and the dynamic mechanical properties of polyurethane materials, providing data support and theoretical reference for selecting polyurethane material thickness in impact-resistant protection engineering.

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