Time-temperature-stress superposition of PBX 9502 compressive creep data for lifetime predictions

Woznick, Caitlin S.; Thompson, Darla Graff; De Luca, Racci; Scott, Sidney J.

doi:10.1063/12.0020365

Time-temperature-stress superposition of PBX 9502 compressive creep data for lifetime predictions

Journal Article · Tue Sep 26 00:00:00 EDT 2023 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/12.0020365· OSTI ID:2426756

^[1]; Thompson, Darla Graff ^[1]; De Luca, Racci ^[1]; ^[1]

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

The plastic-bonded explosive (PBX) 9502 is a viscoelastic, high-solids loaded polymer bound composite comprised of 95 weight% (wt%) TATB explosive crystals and 5 wt% FK-800 polymer binder. The uniaxial quasi-static mechanical properties have been studied and characterized extensively over 25+ years, including creep. Creep is the strain evolution over time as a result of an asymmetric load typically at temperatures above ambient. Creep measurements to failure can take excessively long periods of time depending on various factors including applied stress, temperature, and loading rate that render a single test to failure impossible. Using the principles of time-temperature-stress superposition (TTSSP), short-term creep tests at various applied stresses and temperatures can be used for long-term creep predictions. The TTSSP model shifts short-term test data using two factors, one for temperature and stress, creating a master curve at a reference test condition. The master curve can be shifted to predict the creep response at any desired test condition. PBX 9502 compression specimens were tested at three temperatures and various applied stresses. This work discusses the TTSSP analysis of PBX 9502 compressive creep data to create a single comprehensive master curve.

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2426756

Report Number(s):: LA-UR--22-31092

Journal Information:: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 2844; ISSN 0094-243X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Creep
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