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Title: WSEAT Shock Testing Margin Assessment Using Energy Spectra Final Report

Abstract

Several programs at Sandia National Laboratories have adopted energy spectra as a metric to relate the severity of mechanical insults to structural capacity. The purpose being to gain insight into the system's capability, reliability, and to quantify the ultimate margin between the normal operating envelope and the likely system failure point -- a system margin assessment. The fundamental concern with the use of energy metrics was that the applicability domain and implementation details were not completely defined for many problems of interest. The goal of this WSEAT project was to examine that domain of applicability and work out the necessary implementation details. The goal of this project was to provide experimental validation for the energy spectra based methods in the context of margin assessment as they relate to shock environments. The extensive test results concluded that failure predictions using energy methods did not agree with failure predictions using S-N data. As a result, a modification to the energy methods was developed following the form of Basquin's equation to incorporate the power law exponent for fatigue damage. This update to the energy-based framework brings the energy based metrics into agreement with experimental data and historical S-N data.

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Enviroments Engineering and Integration
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); WSEAT
OSTI Identifier:
1423932
Report Number(s):
SAND-2018-1898
660837
DOE Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 54 ENVIRONMENTAL SCIENCES

Citation Formats

Sisemore, Carl, Babuska, Vit, and Booher, Jason. WSEAT Shock Testing Margin Assessment Using Energy Spectra Final Report. United States: N. p., 2018. Web. doi:10.2172/1423932.
Sisemore, Carl, Babuska, Vit, & Booher, Jason. WSEAT Shock Testing Margin Assessment Using Energy Spectra Final Report. United States. doi:10.2172/1423932.
Sisemore, Carl, Babuska, Vit, and Booher, Jason. Mon . "WSEAT Shock Testing Margin Assessment Using Energy Spectra Final Report". United States. doi:10.2172/1423932. https://www.osti.gov/servlets/purl/1423932.
@article{osti_1423932,
title = {WSEAT Shock Testing Margin Assessment Using Energy Spectra Final Report},
author = {Sisemore, Carl and Babuska, Vit and Booher, Jason},
abstractNote = {Several programs at Sandia National Laboratories have adopted energy spectra as a metric to relate the severity of mechanical insults to structural capacity. The purpose being to gain insight into the system's capability, reliability, and to quantify the ultimate margin between the normal operating envelope and the likely system failure point -- a system margin assessment. The fundamental concern with the use of energy metrics was that the applicability domain and implementation details were not completely defined for many problems of interest. The goal of this WSEAT project was to examine that domain of applicability and work out the necessary implementation details. The goal of this project was to provide experimental validation for the energy spectra based methods in the context of margin assessment as they relate to shock environments. The extensive test results concluded that failure predictions using energy methods did not agree with failure predictions using S-N data. As a result, a modification to the energy methods was developed following the form of Basquin's equation to incorporate the power law exponent for fatigue damage. This update to the energy-based framework brings the energy based metrics into agreement with experimental data and historical S-N data.},
doi = {10.2172/1423932},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {1}
}

Technical Report:

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