Strain hardening and shock mitigation response of polyurethane under high strain rates
Source abstract
Abstract
Polyurethane is a promising candidate for the potting of embedded electronics due to its shock absorbing properties. This paper discusses the less known strain hardening and shock mitigation properties of 4,4′-methylenediphenyl diisocyanate based polyurethane under dynamic loading. This study is reported in a strain rate range of 1600–2900 s−1 under compression using a split-Hopkinson pressure bar (SHPB). The experimental stress–strain behavior of polyurethane was modeled with Hollomon’s equation to analyze its hardening behavior in dynamic environments. Jointly, the incident, reflected, and transmitted strain signals of the SHPB are analyzed in time and frequency domains to understand the shock absorbing properties of polyurethane. Polyurethane was found to absorb more shock for more intense loading. It was observed to mitigate 81% of shock energy with frequencies up to 10 kHz.
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Research context
OpenAlex topics: High-Velocity Impact and Material Behavior · Structural Response to Dynamic Loads · Energetic Materials and Combustion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Academy of Scientific and Innovative Research (AcSIR) 1 , Ghaziabad 201002, India
CSIR-Central Scientific Instruments Organisation 2 , Sector 30C, Chandigarh 160030, India
Terminal Ballistics Research Laboratory 3 , Sector 30, 160030 Chandigarh, India
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