Physical properties effect on stress-strain behavior of wheat En Masse - Part II. Constitutive elastoplastic parameter dependence on initial bulk density and moisture content

Q. Zhang, Y. Li, Virendra Puri, H. B. Manbeck

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of physical properties, i.e., the initial bulk density and moisture content, on the stress-strain behavior of wheat en masse was studied for axial and isotropic compression loadings. The dependence of fourteen Lade elastoplastic constitutive model parameters on three initial bulk densities and two moisture contents were analyzed statistically. Moisture content mostly affected the elastic parameters, whereas the initial bulk density mainly affected the plastic expansive parameters. Neither bulk density nor moisture content had a significant effect on the plastic collapse parameters over the range of test conditions. Constitutive parameter values were linearly interpolated at an intermediate initial bulk density and moisture content to predict and compare stress-strain behavior of wheat. The χ2 test validated the model prediction in axial and isotropic compression at a 0.05 level of significance.

Original languageEnglish (US)
Pages (from-to)203-209
Number of pages7
JournalTransactions of the American Society of Agricultural Engineers
Volume32
Issue number1
StatePublished - Jan 1 1989

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Plastics
Triticum
bulk density
physical properties
moisture content
Moisture
Physical properties
physical property
wheat
water content
plastics
plastic
compression
Constitutive models
testing
effect
parameter
prediction
test

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)

Cite this

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AU - Puri, Virendra

AU - Manbeck, H. B.

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N2 - The effect of physical properties, i.e., the initial bulk density and moisture content, on the stress-strain behavior of wheat en masse was studied for axial and isotropic compression loadings. The dependence of fourteen Lade elastoplastic constitutive model parameters on three initial bulk densities and two moisture contents were analyzed statistically. Moisture content mostly affected the elastic parameters, whereas the initial bulk density mainly affected the plastic expansive parameters. Neither bulk density nor moisture content had a significant effect on the plastic collapse parameters over the range of test conditions. Constitutive parameter values were linearly interpolated at an intermediate initial bulk density and moisture content to predict and compare stress-strain behavior of wheat. The χ2 test validated the model prediction in axial and isotropic compression at a 0.05 level of significance.

AB - The effect of physical properties, i.e., the initial bulk density and moisture content, on the stress-strain behavior of wheat en masse was studied for axial and isotropic compression loadings. The dependence of fourteen Lade elastoplastic constitutive model parameters on three initial bulk densities and two moisture contents were analyzed statistically. Moisture content mostly affected the elastic parameters, whereas the initial bulk density mainly affected the plastic expansive parameters. Neither bulk density nor moisture content had a significant effect on the plastic collapse parameters over the range of test conditions. Constitutive parameter values were linearly interpolated at an intermediate initial bulk density and moisture content to predict and compare stress-strain behavior of wheat. The χ2 test validated the model prediction in axial and isotropic compression at a 0.05 level of significance.

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