Dynamic Strength and Equation of State of Epon 828 and Diethanolamine (DEA) Polymer Epoxy Under Shock Loading

Padgiotis, A.; Voorhees, T. J.; Vogler, T. J.; Jackson, S. I.

doi:10.1007/s40870-025-00469-7

Dynamic Strength and Equation of State of Epon 828 and Diethanolamine (DEA) Polymer Epoxy Under Shock Loading

Journal Article · Thu May 01 00:00:00 EDT 2025 · Journal of Dynamic Behavior of Materials

DOI:https://doi.org/10.1007/s40870-025-00469-7· OSTI ID:2563778

^[1]; Voorhees, T. J. ^[2]; Vogler, T. J. ^[2]; Jackson, S. I. ^[3]

Texas A & M Univ., College Station, TX (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Texas A & M Univ., College Station, TX (United States)

Polymers are increasingly utilized in engineering applications that can experience high loading rates, necessitating increased understanding of their response under such conditions. The tamped Richtmyer-Meshkov Instability (RMI) method was used to characterize the equation of state and dynamic strength of the polymer Epon 828 cured with Diethanolamine (DEA). Plate impact experiments that drove a uniaxial shock compression wave across a sinusoidally corrugated metal-polymer interface were performed to generate shock stresses from 4-12 GPa and strain rates of approximately 1/s in the polymer. X-ray phase contrast imaging recorded the shock motion in the polymer and subsequent interface evolution. Analysis of this data yielded the polymer equation of state and, in conjunction with numerical modeling, the dynamic strength. The equation of state was validated against one-dimensional plate impact experiments from existing literature. The dynamic strength was compared to prior data for Epon 828 and related polymers at lower strain rates and found to exhibit significant strain rate and pressure-hardening effects. The strength of the Epon 828 polymer at 10⁶ 1/s was found to be approximately 1.5 GPa, suggesting that it is comparable to the strength of high strength metals at these dynamic conditions.

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Research Organization:: Sandia National Lab. (SNL-CA), Livermore, CA (United States); Washington State Univ., Pullman, WA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)

Grant/Contract Number:: AC02-06CH11357; NA0003525; NA0003957; NA0003960

OSTI ID:: 2563778

Alternate ID(s):: OSTI ID: 3020549

Journal Information:: Journal of Dynamic Behavior of Materials, Journal Name: Journal of Dynamic Behavior of Materials Journal Issue: 4 Vol. 11; ISSN 2199-7446; ISSN 2199-7454

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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