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Title: Statistical analysis of compositional factors affecting the compressive strength of alumina-loaded epoxy (ALOX).

Abstract

Detailed statistical analysis of the experimental data from testing of alumina-loaded epoxy (ALOX) composites was conducted to better understand influences of the selected compositional properties on the compressive strength of these ALOX composites. Analysis of variance (ANOVA) for different models with different sets of parameters identified the optimal statistical model as, y{sub l} = -150.71 + 29.72T{sub l} + 204.71D{sub l} + 160.93S{sub 1l} + 90.41S{sub 2l}-20.366T{sub l}S{sub 2l}-137.85D{sub l}S{sub 1l}-90.08D{sub l}S{sub 2l} where y{sub l} is the predicted compressive strength, T{sub l} is the powder type, D{sub l} is the density as the covariate for powder volume concentration, and S{sub il}(i=1,2) is the strain rate. Based on the optimal statistical model, we conclude that the compressive strength of the ALOX composite is significantly influenced by the three main factors examined: powder type, density, and strain rate. We also found that the compressive strength of the ALOX composite is significantly influenced by interactions between the powder type and the strain rate and between the powder volume concentration and the strain rate. However, the interaction between the powder type and the powder volume concentration may not significantly influence the compressive strength of the ALOX composite.

Authors:
;  [1];
  1. (Washington State University, Pullman, WA)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
877740
Report Number(s):
SAND2006-0513
TRN: US200607%%359
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; EPOXIDES; COMPOSITE MATERIALS; COMPRESSION STRENGTH; STRAIN RATE; MATERIALS TESTING; Statistical physics.; Aluminum-Analysis.; Epoxy compounds.

Citation Formats

Montgomery, Stephen Tedford, Ahn, Sung K., and Lee, Moo Yul. Statistical analysis of compositional factors affecting the compressive strength of alumina-loaded epoxy (ALOX).. United States: N. p., 2006. Web. doi:10.2172/877740.
Montgomery, Stephen Tedford, Ahn, Sung K., & Lee, Moo Yul. Statistical analysis of compositional factors affecting the compressive strength of alumina-loaded epoxy (ALOX).. United States. doi:10.2172/877740.
Montgomery, Stephen Tedford, Ahn, Sung K., and Lee, Moo Yul. Wed . "Statistical analysis of compositional factors affecting the compressive strength of alumina-loaded epoxy (ALOX).". United States. doi:10.2172/877740. https://www.osti.gov/servlets/purl/877740.
@article{osti_877740,
title = {Statistical analysis of compositional factors affecting the compressive strength of alumina-loaded epoxy (ALOX).},
author = {Montgomery, Stephen Tedford and Ahn, Sung K. and Lee, Moo Yul},
abstractNote = {Detailed statistical analysis of the experimental data from testing of alumina-loaded epoxy (ALOX) composites was conducted to better understand influences of the selected compositional properties on the compressive strength of these ALOX composites. Analysis of variance (ANOVA) for different models with different sets of parameters identified the optimal statistical model as, y{sub l} = -150.71 + 29.72T{sub l} + 204.71D{sub l} + 160.93S{sub 1l} + 90.41S{sub 2l}-20.366T{sub l}S{sub 2l}-137.85D{sub l}S{sub 1l}-90.08D{sub l}S{sub 2l} where y{sub l} is the predicted compressive strength, T{sub l} is the powder type, D{sub l} is the density as the covariate for powder volume concentration, and S{sub il}(i=1,2) is the strain rate. Based on the optimal statistical model, we conclude that the compressive strength of the ALOX composite is significantly influenced by the three main factors examined: powder type, density, and strain rate. We also found that the compressive strength of the ALOX composite is significantly influenced by interactions between the powder type and the strain rate and between the powder volume concentration and the strain rate. However, the interaction between the powder type and the powder volume concentration may not significantly influence the compressive strength of the ALOX composite.},
doi = {10.2172/877740},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}

Technical Report:

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  • This is a final annual report to the Lawrence Livermore National Laboratory on a project to determine the strength of carbon/epoxy laminates under conditions of multiaxial compressive stress. It was found that the compressive strength of the critical plies in a laminate depends on the total layup of the laminate, and thus compressive strength is an apparent or in-situ'' property. Variations in apparent strength by a factor of 2 were found over the range of laminates investigated. Biaxial compression loadings showed lower than expected failure by buckling under external pressure. The multiaxial compression apparatus was redesigned to eliminate specimen endmore » brooming under conditions of high axial load. 12 refs., 14 figs., 2 tabs.« less
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